chore(package): bump version to 1.0.10-express

fix: analytics overload problem with group and indexing
chore(package): bump version to 1.0.9-express
2026-05-26 16:48:23 +09:00 · 2026-05-26 16:47:48 +09:00 · 2026-05-13 21:55:05 +09:00 · 2026-05-13 21:54:44 +09:00 · 2026-05-12 18:24:46 +09:00 · 2026-05-12 18:24:01 +09:00
45 changed files with 1201 additions and 332 deletions
--- a/.env.example
+++ b/.env.example
@ -17,6 +17,9 @@ ADMIN_API_TOKEN_TTL_DAYS=30
 CORS_ORIGINS=http://localhost:3000,http://127.0.0.1:3000
 ADMIN_TRUSTED_PROXY_IPS=

+# Model routing
+MODEL_LIST_INCLUDE_ROUTING_METADATA=false
+
 # OpenID Connect
 OIDC_ISSUER_URL=
 OIDC_CLIENT_ID=
--- a/.forgejo/workflows/publish-images.yml
+++ b/.forgejo/workflows/publish-images.yml
@ -80,11 +80,12 @@ jobs:

          docker_args=(
            build
-            .
            --file Dockerfile
+            --progress=plain
            --target app
            --label "org.opencontainers.image.source=${REPOSITORY_URL}"
            --label "org.opencontainers.image.revision=${GITHUB_SHA}"
+            .
          )

          for tag in "${tags[@]}"; do
@ -96,5 +97,3 @@ jobs:
          for tag in "${tags[@]}"; do
            docker push "${tag}"
          done
-
-          # The single OCI image contains the public API and the admin dashboard runtime.
--- a/AGENTS.md
+++ b/AGENTS.md
@ -78,6 +78,7 @@ pnpm run bench      # 벤치마크 실행
 | `OIDC_ALLOWED_EMAILS` | empty | 관리자 접근을 허용할 이메일 목록 |
 | `OIDC_SCOPES` | `openid profile email` | OIDC authorization scope |
 | `MODEL_CATALOG_REFRESH_MIN_MS` | `300000` 예시 | 모델 카탈로그 refresh 최소 간격(ms) |
+| `MODEL_LIST_INCLUDE_ROUTING_METADATA` | `false` | `true`이면 `/v1/models` model object에 비표준 `kyush_router` routing metadata 추가 |
 | `DETAIL_STREAM_LOG_MODE` | `compact` | 상세 로그에서 stream response body 저장 방식 (`compact`, `raw`, `both`, `off`) |

 ## Detailed Docs
--- a/client/src/api/client.ts
+++ b/client/src/api/client.ts
@ -99,7 +99,7 @@ export const api = {
  users: {
    getAll: (): Promise<User[]> => fetchJson<User[]>(`${API_BASE}/admin/users`),
    getById: (id: number): Promise<User> => fetchJson<User>(`${API_BASE}/admin/users/${id}`),
-    create: (data: { name: string; email?: string; api_key?: string; detail_logging?: boolean }): Promise<User> =>
+    create: (data: { name: string; email?: string; api_key?: string; detail_logging?: boolean; copy_reasoning_to_reasoning_content?: boolean }): Promise<User> =>
      fetchJson<User>(`${API_BASE}/admin/users`, { method: 'POST', body: JSON.stringify(data) }),
    update: (id: number, data: Partial<User>): Promise<User> =>
      fetchJson<User>(`${API_BASE}/admin/users/${id}`, { method: 'PUT', body: JSON.stringify(data) }),
--- a/client/src/routes/Analytics.tsx
+++ b/client/src/routes/Analytics.tsx
@ -1,4 +1,5 @@
-import { Show, createMemo, createResource, createSignal, type Component } from 'solid-js';
+import RefreshCw from 'lucide-solid/icons/refresh-cw';
+import { createEffect, createMemo, createResource, createSignal, onCleanup, type Component } from 'solid-js';
 import { api } from '../api/client';
 import { Layout } from '../components/Layout';
 import { formatDurationMs } from '../ui/lib/format';
@ -13,6 +14,7 @@ import {
  Panel,
  Select,
  SummaryStrip,
+  Switch,
  TimeSeriesChart,
 } from '../ui';

@ -32,10 +34,15 @@ export const Analytics: Component = () => {
  const [hiddenDailySeries, setHiddenDailySeries] = createSignal<Set<string>>(new Set());
  const [hiddenResponseSeries, setHiddenResponseSeries] = createSignal<Set<string>>(new Set());
  const [hiddenModelSeries, setHiddenModelSeries] = createSignal<Set<string>>(new Set());
+  const [isAutoRefresh, setIsAutoRefresh] = createSignal(false);
+  const [refreshInterval, setRefreshInterval] = createSignal('10');
+  const [refreshKey, setRefreshKey] = createSignal(0);
+  const [dailyVolumeScale, setDailyVolumeScale] = createSignal<'linear' | 'log'>('linear');

  const filters = createMemo(() => ({
    days: Number(days()),
    backendId: backendFilter() === 'all' ? undefined : Number(backendFilter()),
+    key: refreshKey(),
  }));

  const [backends] = createResource(() => api.backends.getAll());
@ -44,6 +51,19 @@ export const Analytics: Component = () => {
  const [modelTrends] = createResource(filters, (params) => api.analytics.getModelTrends({ backendId: params.backendId, days: params.days, limit: 8 }));
  const [histogram] = createResource(filters, (params) => api.analytics.getResponseLengthHistogram({ backendId: params.backendId, days: params.days, bins: 20 }));
  const [boxPlot] = createResource(filters, (params) => api.analytics.getResponseLengthBoxPlot(params.backendId, params.days));
+  const currentDailyTotals = createMemo(() => dailyTotals.latest ?? dailyTotals());
+  const currentBackendQuality = createMemo(() => backendQuality.latest ?? backendQuality());
+  const currentModelTrends = createMemo(() => modelTrends.latest ?? modelTrends());
+  const currentHistogram = createMemo(() => histogram.latest ?? histogram());
+  const currentBoxPlot = createMemo(() => boxPlot.latest ?? boxPlot());
+  const analyticsLoading = createMemo(() => dailyTotals.loading || backendQuality.loading || modelTrends.loading || histogram.loading || boxPlot.loading);
+
+  createEffect(() => {
+    if (!isAutoRefresh()) return;
+    const ms = Number(refreshInterval()) * 1000;
+    const id = setInterval(() => setRefreshKey((key) => key + 1), ms);
+    onCleanup(() => clearInterval(id));
+  });

  const backendOptions = createMemo(() => [
    { value: 'all', label: 'All Backends' },
@ -62,7 +82,7 @@ export const Analytics: Component = () => {
  });

  const dailyVolumeRows = createMemo(() =>
-    (dailyTotals() ?? []).map((row) => ({
+    (currentDailyTotals() ?? []).map((row) => ({
      date: row.date,
      requests: row.total_requests,
      tokens: row.total_tokens,
@ -71,7 +91,7 @@ export const Analytics: Component = () => {

  const responseTimeRows = createMemo(() => {
    const grouped = new Map<string, AnalyticsChartRow>();
-    for (const row of backendQuality() ?? []) {
+    for (const row of currentBackendQuality() ?? []) {
      const entry: AnalyticsChartRow = grouped.get(row.date) ?? { date: row.date };
      entry[`backend_${row.backend_id}`] = row.avg_response_time_ms;
      grouped.set(row.date, entry);
@ -80,7 +100,7 @@ export const Analytics: Component = () => {
  });

  const responseTimeSeries = createMemo(() => {
-    const ids = Array.from(new Set((backendQuality() ?? []).map((row) => row.backend_id))).sort((left, right) => left - right);
+    const ids = Array.from(new Set((currentBackendQuality() ?? []).map((row) => row.backend_id))).sort((left, right) => left - right);
    return ids.map((backendId, index) => ({
      key: `backend_${backendId}`,
      label: backendNameById().get(backendId) ?? `Backend ${backendId}`,
@ -90,7 +110,7 @@ export const Analytics: Component = () => {

  const reliabilityRows = createMemo(() => {
    const grouped = new Map<string, { requests: number; errors: number }>();
-    for (const row of backendQuality() ?? []) {
+    for (const row of currentBackendQuality() ?? []) {
      const entry = grouped.get(row.date) ?? { requests: 0, errors: 0 };
      entry.requests += row.total_requests;
      entry.errors += row.error_count;
@ -108,7 +128,7 @@ export const Analytics: Component = () => {

  const modelTrendRows = createMemo(() => {
    const grouped = new Map<string, AnalyticsChartRow>();
-    for (const row of modelTrends() ?? []) {
+    for (const row of currentModelTrends() ?? []) {
      const entry: AnalyticsChartRow = grouped.get(row.date) ?? { date: row.date };
      entry[`model_${row.model}`] = row.request_count;
      grouped.set(row.date, entry);
@ -117,7 +137,7 @@ export const Analytics: Component = () => {
  });

  const modelTrendSeries = createMemo(() => {
-    const models = Array.from(new Set((modelTrends() ?? []).map((row) => row.model)));
+    const models = Array.from(new Set((currentModelTrends() ?? []).map((row) => row.model)));
    return models.map((model, index) => ({
      key: `model_${model}`,
      label: model,
@ -126,7 +146,7 @@ export const Analytics: Component = () => {
  });

  const summaryItems = createMemo(() => {
-    const totals = (dailyTotals() ?? []).reduce(
+    const totals = (currentDailyTotals() ?? []).reduce(
      (acc, row) => {
        acc.requests += row.total_requests;
        acc.tokens += row.total_tokens;
@ -134,7 +154,7 @@ export const Analytics: Component = () => {
      },
      { requests: 0, tokens: 0 }
    );
-    const qualityRows = backendQuality() ?? [];
+    const qualityRows = currentBackendQuality() ?? [];
    const avgLatency =
      qualityRows.length === 0 ? 0 : qualityRows.reduce((sum, row) => sum + row.avg_response_time_ms, 0) / qualityRows.length;
    const errorCount = qualityRows.reduce((sum, row) => sum + row.error_count, 0);
@ -175,6 +195,37 @@ export const Analytics: Component = () => {
            <Select label="Window" value={days()} options={dayOptions} onChange={setDays} />
            <Select label="Backend" value={backendFilter()} options={backendOptions()} onChange={setBackendFilter} />
          </CommandBarGroup>
+          <CommandBarGroup>
+            <Switch
+              label="Auto refresh"
+              checked={isAutoRefresh()}
+              onChange={setIsAutoRefresh}
+            />
+            <Select
+              label="Refresh Interval"
+              value={refreshInterval()}
+              options={[
+                { value: '5', label: 'Every 5s' },
+                { value: '10', label: 'Every 10s' },
+                { value: '30', label: 'Every 30s' },
+                { value: '60', label: 'Every 60s' },
+                { value: '600', label: 'Every 10m' },
+              ]}
+              onChange={setRefreshInterval}
+            />
+            <div class="ui-divider--vertical" />
+            <button
+              class="ui-button analytics__refresh-button"
+              classList={{ 'ui-button--loading': analyticsLoading() }}
+              type="button"
+              onClick={() => setRefreshKey((key) => key + 1)}
+              disabled={analyticsLoading()}
+              aria-busy={analyticsLoading()}
+            >
+              <RefreshCw />
+              {analyticsLoading() ? 'Refreshing' : 'Refresh'}
+            </button>
+          </CommandBarGroup>
        </CommandBar>

        <SummaryStrip items={summaryItems()} />
@ -184,14 +235,25 @@ export const Analytics: Component = () => {
            title="Daily Volume"
            description="Daily request and token totals on shared time axis."
            actions={
-              <ChartLegend
-                items={[
-                  { key: 'requests', label: 'Requests', color: '#2357d8' },
-                  { key: 'tokens', label: 'Tokens', color: '#1f7a45' },
-                ]}
-                mutedKeys={hiddenDailySeries()}
-                onToggle={(key) => toggleHiddenKey(setHiddenDailySeries, key)}
-              />
+              <div style="display: flex; align-items: center; gap: 16px;">
+                <ChartLegend
+                  items={[
+                    { key: 'requests', label: 'Requests', color: '#2357d8' },
+                    { key: 'tokens', label: 'Tokens', color: '#1f7a45' },
+                  ]}
+                  mutedKeys={hiddenDailySeries()}
+                  onToggle={(key) => toggleHiddenKey(setHiddenDailySeries, key)}
+                />
+                <Select
+                  label="Scale"
+                  value={dailyVolumeScale()}
+                  options={[
+                    { value: 'linear', label: 'Linear' },
+                    { value: 'log', label: 'Log' },
+                  ]}
+                  onChange={setDailyVolumeScale}
+                />
+              </div>
            }
          >
            <TimeSeriesChart
@ -208,6 +270,7 @@ export const Analytics: Component = () => {
              formatLeftValue={(value) => new Intl.NumberFormat('en-US').format(Math.round(value))}
              formatRightValue={(value) => new Intl.NumberFormat('en-US', { notation: 'compact', maximumFractionDigits: 1 }).format(value)}
              tooltipTitle="Daily request and token totals"
+              yScaleType={dailyVolumeScale()}
            />
          </Panel>

@ -285,14 +348,14 @@ export const Analytics: Component = () => {
        <div class="ui-section-grid analytics__grid--spread-wide">
          <Panel title="Response Length Distribution" description="Log-scaled completion_tokens histogram across the selected window.">
            <HistogramChart
-              data={histogram() ?? []}
+              data={currentHistogram() ?? []}
              xTickUnit="tok"
              yTickUnit="req"
            />
          </Panel>

          <Panel title="Daily Response Length Spread" description="Log-scaled daily completion_tokens spread; outliers are hidden.">
-            <BoxPlotChart data={boxPlot() ?? []} />
+            <BoxPlotChart data={currentBoxPlot() ?? []} />
          </Panel>
        </div>
      </div>
--- a/client/src/routes/Backends.tsx
+++ b/client/src/routes/Backends.tsx
@ -1,4 +1,4 @@
-import { For, createResource, createSignal, Show, type Component } from 'solid-js';
+import { For, createMemo, createResource, createSignal, Show, type Component } from 'solid-js';
 import Pencil from 'lucide-solid/icons/pencil';
 import Plus from 'lucide-solid/icons/plus';
 import RefreshCw from 'lucide-solid/icons/refresh-cw';
@ -39,6 +39,7 @@ const emptyForm = (): BackendFormState => ({

 export const Backends: Component = () => {
  const [backends, { refetch }] = createResource(() => api.backends.getAll());
+  const currentBackends = createMemo(() => backends.state === 'ready' || backends.state === 'refreshing' ? backends.latest : undefined);
  const [dialogOpen, setDialogOpen] = createSignal(false);
  const [confirmOpen, setConfirmOpen] = createSignal(false);
  const [editingBackend, setEditingBackend] = createSignal<Backend | null>(null);
@ -202,11 +203,11 @@ export const Backends: Component = () => {

        <Panel title="Backend catalog" description="Operational list with overflow-safe URL presentation and compact actions.">
          <Show
-            when={!backends.loading || (backends()?.length ?? 0) > 0}
+            when={!backends.loading || (currentBackends()?.length ?? 0) > 0}
            fallback={<EmptyState title="Loading backends" description="Reading upstream routing targets from the admin API." />}
          >
            <Show
-              when={(backends()?.length ?? 0) > 0}
+              when={(currentBackends()?.length ?? 0) > 0}
              fallback={
                <EmptyState
                  title="No backends yet"
@ -216,7 +217,7 @@ export const Backends: Component = () => {
              }
            >
              <DataGrid
-                rows={backends() ?? []}
+                rows={currentBackends() ?? []}
                columns={[
                  { id: 'id', header: 'ID', mono: true, cell: (backend) => <span>{backend.id}</span> },
                  { id: 'name', header: 'Name', cell: (backend) => <span>{backend.name}</span> },
@ -248,7 +249,7 @@ export const Backends: Component = () => {
                  },
                ]}
                getRowKey={(backend) => backend.id}
-                loading={backends.loading}
+                loading={backends.loading && (currentBackends()?.length ?? 0) === 0}
                rowActions={(backend) => (
                  <div class="ui-row-actions">
                    <IconButton
--- a/client/src/routes/Dashboard.tsx
+++ b/client/src/routes/Dashboard.tsx
@ -1,5 +1,5 @@
-import RefreshCcw from 'lucide-solid/icons/refresh-ccw';
-import { Show, createMemo, createResource, createSignal, type Component } from 'solid-js';
+import RefreshCw from 'lucide-solid/icons/refresh-cw';
+import { Show, createEffect, createMemo, createResource, createSignal, onCleanup, type Component } from 'solid-js';
 import { api } from '../api/client';
 import { Layout } from '../components/Layout';
 import { formatDurationMs } from '../ui/lib/format';
@ -14,6 +14,7 @@ import {
  Panel,
  Select,
  SummaryStrip,
+  Switch,
  TimeSeriesChart,
 } from '../ui';

@ -33,10 +34,23 @@ export const Dashboard: Component = () => {
  const [hiddenTrafficSeries, setHiddenTrafficSeries] = createSignal<Set<string>>(new Set());
  const [hiddenLatencySeries, setHiddenLatencySeries] = createSignal<Set<string>>(new Set());
  const [hiddenModelSeries, setHiddenModelSeries] = createSignal<Set<string>>(new Set());
+  const [isAutoRefresh, setIsAutoRefresh] = createSignal(false);
+  const [refreshInterval, setRefreshInterval] = createSignal('10');
+  const [refreshKey, setRefreshKey] = createSignal(0);
+  const [trafficVolumeScale, setTrafficVolumeScale] = createSignal<'linear' | 'log'>('linear');

  const windowDays = createMemo(() => Number(days()));
-  const [summary, { refetch }] = createResource(windowDays, (value) => api.dashboard.getSummary(value));
+  const summarySource = createMemo(() => ({ days: windowDays(), key: refreshKey() }));
+  const [summary] = createResource(summarySource, (value) => api.dashboard.getSummary(value.days));
  const [backends] = createResource(() => api.backends.getAll());
+  const currentSummary = createMemo(() => summary.latest ?? summary());
+
+  createEffect(() => {
+    if (!isAutoRefresh()) return;
+    const ms = Number(refreshInterval()) * 1000;
+    const id = setInterval(() => setRefreshKey((k) => k + 1), ms);
+    onCleanup(() => clearInterval(id));
+  });

  const backendNameById = createMemo(() => {
    const entries = new Map<number, string>();
@ -47,7 +61,7 @@ export const Dashboard: Component = () => {
  });

  const trafficRows = createMemo(() =>
-    (summary()?.series.daily_totals ?? []).map((row) => ({
+    (currentSummary()?.series.daily_totals ?? []).map((row) => ({
      date: row.date,
      requests: row.total_requests,
      tokens: row.total_tokens,
@ -56,7 +70,7 @@ export const Dashboard: Component = () => {

  const reliabilityRows = createMemo(() => {
    const grouped = new Map<string, { requests: number; errors: number }>();
-    for (const row of summary()?.series.backend_quality ?? []) {
+    for (const row of currentSummary()?.series.backend_quality ?? []) {
      const entry = grouped.get(row.date) ?? { requests: 0, errors: 0 };
      entry.requests += row.total_requests;
      entry.errors += row.error_count;
@ -74,7 +88,7 @@ export const Dashboard: Component = () => {

  const latencyRows = createMemo(() => {
    const grouped = new Map<string, DashboardChartRow>();
-    for (const row of summary()?.series.backend_quality ?? []) {
+    for (const row of currentSummary()?.series.backend_quality ?? []) {
      const entry: DashboardChartRow = grouped.get(row.date) ?? { date: row.date };
      entry[`backend_${row.backend_id}`] = row.avg_response_time_ms;
      grouped.set(row.date, entry);
@ -83,7 +97,7 @@ export const Dashboard: Component = () => {
  });

  const latencySeries = createMemo(() => {
-    const ids = Array.from(new Set((summary()?.series.backend_quality ?? []).map((row) => row.backend_id))).sort((left, right) => left - right);
+    const ids = Array.from(new Set((currentSummary()?.series.backend_quality ?? []).map((row) => row.backend_id))).sort((left, right) => left - right);
    return ids.map((backendId, index) => ({
      key: `backend_${backendId}`,
      label: backendNameById().get(backendId) ?? `Backend ${backendId}`,
@ -93,7 +107,7 @@ export const Dashboard: Component = () => {

  const modelRows = createMemo(() => {
    const grouped = new Map<string, DashboardChartRow>();
-    for (const row of summary()?.series.model_trends ?? []) {
+    for (const row of currentSummary()?.series.model_trends ?? []) {
      const entry: DashboardChartRow = grouped.get(row.date) ?? { date: row.date };
      entry[`model_${row.model}`] = row.request_count;
      grouped.set(row.date, entry);
@ -102,7 +116,7 @@ export const Dashboard: Component = () => {
  });

  const modelSeries = createMemo(() => {
-    const models = Array.from(new Set((summary()?.series.model_trends ?? []).map((row) => row.model)));
+    const models = Array.from(new Set((currentSummary()?.series.model_trends ?? []).map((row) => row.model)));
    return models.map((model, index) => ({
      key: `model_${model}`,
      label: model,
@ -111,7 +125,7 @@ export const Dashboard: Component = () => {
  });

  const summaryItems = createMemo(() => {
-    const payload = summary();
+    const payload = currentSummary();
    const latestTraffic = payload?.series.daily_totals[payload.series.daily_totals.length - 1];

    return [
@ -123,7 +137,7 @@ export const Dashboard: Component = () => {
  });

  const cacheStateItems = createMemo(() => {
-    const counts = summary()?.health.cache_state_counts;
+    const counts = currentSummary()?.health.cache_state_counts;
    if (!counts) return [];
    return [
      { key: 'Ready', value: String(counts.ready) },
@ -134,7 +148,7 @@ export const Dashboard: Component = () => {
  });

  const scriptItems = createMemo(() => {
-    const payload = summary();
+    const payload = currentSummary();
    if (!payload) return [];

    return [
@ -145,7 +159,7 @@ export const Dashboard: Component = () => {
  });

  const accessItems = createMemo(() => {
-    const payload = summary();
+    const payload = currentSummary();
    if (!payload) return [];

    return [
@ -177,13 +191,43 @@ export const Dashboard: Component = () => {
        <PageHeader
          title="Dashboard"
          description="Operations cockpit for router health, traffic shape, and the configuration context behind current behavior."
-          actions={<button class="ui-button" type="button" onClick={() => void refetch()}><RefreshCcw />Refresh</button>}
        />

        <CommandBar class="analytics__filters">
          <CommandBarGroup>
            <Select label="Window" value={days()} options={dayOptions} onChange={setDays} />
          </CommandBarGroup>
+          <CommandBarGroup>
+            <Switch
+              label="Auto refresh"
+              checked={isAutoRefresh()}
+              onChange={setIsAutoRefresh}
+            />
+            <Select
+              label="Refresh Interval"
+              value={refreshInterval()}
+              options={[
+                { value: '5', label: 'Every 5s' },
+                { value: '10', label: 'Every 10s' },
+                { value: '30', label: 'Every 30s' },
+                { value: '60', label: 'Every 60s' },
+                { value: '600', label: 'Every 10m' },
+              ]}
+              onChange={setRefreshInterval}
+            />
+            <div class="ui-divider--vertical" />
+            <button
+              class="ui-button dashboard__refresh-button"
+              classList={{ 'ui-button--loading': summary.loading }}
+              type="button"
+              onClick={() => setRefreshKey((k) => k + 1)}
+              disabled={summary.loading}
+              aria-busy={summary.loading}
+            >
+              <RefreshCw />
+              {summary.loading ? 'Refreshing' : 'Refresh'}
+            </button>
+          </CommandBarGroup>
        </CommandBar>

        <SummaryStrip items={summaryItems()} />
@ -194,14 +238,25 @@ export const Dashboard: Component = () => {
              title="Traffic Volume"
              description="Daily request and token totals for the selected window."
              actions={
-                <ChartLegend
-                  items={[
-                    { key: 'requests', label: 'Requests', color: '#2357d8' },
-                    { key: 'tokens', label: 'Tokens', color: '#1f7a45' },
-                  ]}
-                  mutedKeys={hiddenTrafficSeries()}
-                  onToggle={(key) => toggleHiddenKey(setHiddenTrafficSeries, key)}
-                />
+                <div style="display: flex; align-items: center; gap: 16px;">
+                  <ChartLegend
+                    items={[
+                      { key: 'requests', label: 'Requests', color: '#2357d8' },
+                      { key: 'tokens', label: 'Tokens', color: '#1f7a45' },
+                    ]}
+                    mutedKeys={hiddenTrafficSeries()}
+                    onToggle={(key) => toggleHiddenKey(setHiddenTrafficSeries, key)}
+                  />
+                  <Select
+                    label="Scale"
+                    value={trafficVolumeScale()}
+                    options={[
+                      { value: 'linear', label: 'Linear' },
+                      { value: 'log', label: 'Log' },
+                    ]}
+                    onChange={setTrafficVolumeScale}
+                  />
+                </div>
              }
            >
              <TimeSeriesChart
@ -218,6 +273,7 @@ export const Dashboard: Component = () => {
                formatLeftValue={(value) => formatInteger.format(Math.round(value))}
                formatRightValue={(value) => new Intl.NumberFormat('en-US', { notation: 'compact', maximumFractionDigits: 1 }).format(value)}
                tooltipTitle="Traffic volume"
+                yScaleType={trafficVolumeScale()}
              />
            </Panel>

@ -277,11 +333,11 @@ export const Dashboard: Component = () => {
            <Panel title="Backend Health" description="Cache readiness, liveness, and sync drift indicators for current backends.">
              <MetaCluster items={cacheStateItems()} />
              <Show
-                when={(summary()?.health.stale_backends.length ?? 0) > 0}
+                when={(currentSummary()?.health.stale_backends.length ?? 0) > 0}
                fallback={<EmptyState title="No stale backend syncs" description="All active backends synced within the freshness window." />}
              >
                <div class="dashboard__status-list">
-                  {summary()?.health.stale_backends.map((backend) => (
+                  {currentSummary()?.health.stale_backends.map((backend) => (
                    <div class="dashboard__status-item">
                      <div>
                        <strong>{backend.name}</strong>
--- a/client/src/routes/DetailLogs.tsx
+++ b/client/src/routes/DetailLogs.tsx
@ -1,4 +1,4 @@
-import { createMemo, createResource, createSignal, Show, type Component } from 'solid-js';
+import { createEffect, createMemo, createResource, createSignal, onCleanup, Show, type Component } from 'solid-js';
 import RefreshCcw from 'lucide-solid/icons/refresh-ccw';
 import { api } from '../api/client';
 import { Layout } from '../components/Layout';
@ -15,6 +15,7 @@ interface FilterState {
 }

 const PAGE_SIZE_OPTIONS = [25, 50, 100];
+const SEARCH_DEBOUNCE_MS = 350;

 const emptyFilters = (): FilterState => ({
  month: '',
@ -37,6 +38,7 @@ function prettyPrint(value?: string): string {

 export const DetailLogs: Component = () => {
  const [filters, setFilters] = createSignal<FilterState>(emptyFilters());
+  const [searchDraft, setSearchDraft] = createSignal('');
  const [page, setPage] = createSignal(1);
  const [pageSize, setPageSize] = createSignal(25);
  const [selectedLogId, setSelectedLogId] = createSignal<number | null>(null);
@ -62,9 +64,32 @@ export const DetailLogs: Component = () => {
      })
  );

-  const requestPage = createMemo(() => logs());
+  const updateFilter = (key: keyof FilterState, value: string) => {
+    let changed = false;
+    setFilters((current) => {
+      if (current[key] === value) return current;
+      changed = true;
+      return { ...current, [key]: value };
+    });
+
+    if (changed) {
+      setPage(1);
+    }
+  };
+
+  createEffect(() => {
+    const nextQuery = searchDraft();
+    const id = window.setTimeout(() => updateFilter('q', nextQuery), SEARCH_DEBOUNCE_MS);
+    onCleanup(() => window.clearTimeout(id));
+  });
+
+  const requestPage = createMemo(() => (logs.state === 'ready' || logs.state === 'refreshing' ? logs.latest : undefined));
  const requestRows = createMemo(() => requestPage()?.rows ?? []);
  const totalRows = createMemo(() => requestPage()?.total ?? 0);
+  const logsError = createMemo(() => {
+    if (!logs.error) return null;
+    return logs.error instanceof Error ? logs.error.message : 'Failed to load detailed logs.';
+  });
  const pageCount = createMemo(() => Math.max(1, Math.ceil(totalRows() / pageSize())));
  const rangeStart = createMemo(() => (totalRows() === 0 ? 0 : (page() - 1) * pageSize() + 1));
  const rangeEnd = createMemo(() => Math.min(totalRows(), page() * pageSize()));
@ -139,22 +164,29 @@ export const DetailLogs: Component = () => {
  ];

  const resetFilters = () => {
+    setSearchDraft('');
    setFilters(emptyFilters());
    setPage(1);
  };

-  const updateFilter = (key: keyof FilterState, value: string) => {
-    setFilters((current) => ({ ...current, [key]: value }));
-    setPage(1);
-  };
-
  return (
    <Layout>
      <div class="ui-app-page">
        <PageHeader
          title="Detail Logs"
          description="Inspect verbose request logs with monthly filters, text search, and full request/response payload views."
-          actions={<Button onClick={() => void refetch()}><RefreshCcw />Refresh</Button>}
+          actions={
+            <Button
+              class="detail-logs__refresh-button"
+              classList={{ 'ui-button--loading': logs.loading }}
+              onClick={() => void refetch()}
+              disabled={logs.loading}
+              aria-busy={logs.loading}
+            >
+              <RefreshCcw />
+              {logs.loading ? 'Refreshing' : 'Refresh'}
+            </Button>
+          }
        />

        <SummaryStrip
@ -169,9 +201,9 @@ export const DetailLogs: Component = () => {
          <CommandBarGroup>
            <TextField
              label="Search"
-              value={filters().q}
+              value={searchDraft()}
              placeholder="Search body, headers, models, errors"
-              onInput={(event) => updateFilter('q', event.currentTarget.value)}
+              onInput={(event) => setSearchDraft(event.currentTarget.value)}
            />
            <TextField
              label="Month"
@ -228,7 +260,8 @@ export const DetailLogs: Component = () => {
                },
              ]}
              getRowKey={(row) => row.id}
-              loading={logs.loading}
+              loading={logs.loading && requestRows().length === 0}
+              error={logsError()}
              emptyMessage="No detailed logs matched the current filters."
              onRowClick={(row) => setSelectedLogId(row.id)}
              pagination={{
@ -243,7 +276,7 @@ export const DetailLogs: Component = () => {
                pageSizeOptions: PAGE_SIZE_OPTIONS,
              }}
            />
-            {!logs.loading && requestRows().length === 0 && (
+            {!logs.loading && !logsError() && requestRows().length === 0 && (
              <EmptyState title="No logs found" description="Try a different month, date, or search term." />
            )}
          </Panel>
--- a/client/src/routes/Models.tsx
+++ b/client/src/routes/Models.tsx
@ -41,6 +41,9 @@ export const Models: Component = () => {
  const [overview, { refetch: refetchOverview }] = createResource(() => api.modelCache.getOverview());
  const [backends] = createResource(() => api.backends.getAll());
  const [rules, { refetch: refetchRules }] = createResource(() => api.modelRewrites.getAll());
+  const currentOverview = createMemo(() => overview.state === 'ready' || overview.state === 'refreshing' ? overview.latest : undefined);
+  const currentBackends = createMemo(() => backends.state === 'ready' || backends.state === 'refreshing' ? backends.latest : undefined);
+  const currentRules = createMemo(() => rules.state === 'ready' || rules.state === 'refreshing' ? rules.latest : undefined);
  const [dialogOpen, setDialogOpen] = createSignal(false);
  const [confirmOpen, setConfirmOpen] = createSignal(false);
  const [editingRule, setEditingRule] = createSignal<ModelRewriteRule | null>(null);
@ -50,7 +53,7 @@ export const Models: Component = () => {
  const [notice, setNotice] = createSignal<{ tone: 'success' | 'danger'; message: string } | null>(null);
  const backendNameById = createMemo(() => {
    const names = new Map<number, string>();
-    for (const backend of backends() ?? []) {
+    for (const backend of currentBackends() ?? []) {
      names.set(backend.id, backend.name);
    }
    return names;
@ -58,7 +61,7 @@ export const Models: Component = () => {

  const getBackendName = (backendId: number) => backendNameById().get(backendId) ?? `Backend ${backendId}`;
  const modelCatalogRows = createMemo(() =>
-    (overview()?.models ?? []).map((entry) => ({
+    (currentOverview()?.models ?? []).map((entry) => ({
      ...entry,
      backend_names: entry.backend_ids.map((backendId) => getBackendName(backendId)).join(', '),
    }))
@ -151,9 +154,9 @@ export const Models: Component = () => {

        <SummaryStrip
          items={[
-            { label: 'Catalog Models', value: overview()?.models.length ?? 0, hint: 'Unique models across active backends' },
-            { label: 'Tracked Backends', value: overview()?.backends.length ?? 0, hint: 'Memory cache status by backend' },
-            { label: 'Rewrite Rules', value: rules()?.length ?? 0, hint: 'Global source -> target mappings' },
+            { label: 'Catalog Models', value: currentOverview()?.models.length ?? 0, hint: 'Unique models across active backends' },
+            { label: 'Tracked Backends', value: currentOverview()?.backends.length ?? 0, hint: 'Memory cache status by backend' },
+            { label: 'Rewrite Rules', value: currentRules()?.length ?? 0, hint: 'Global source -> target mappings' },
          ]}
        />

@ -164,11 +167,11 @@ export const Models: Component = () => {
        <div class="ui-section-grid">
          <Panel title="Backend Cache Status" description="Memory-backed backend cache state used by request routing and `/v1/models`.">
            <Show
-              when={(overview()?.backends.length ?? 0) > 0}
+              when={(currentOverview()?.backends.length ?? 0) > 0 || overview.loading}
              fallback={<EmptyState title="No backend cache yet" description="Backend model states appear here after the server has seen active backends." />}
            >
              <DataGrid
-                rows={overview()?.backends ?? []}
+                rows={currentOverview()?.backends ?? []}
                columns={[
                  {
                    id: 'backend_id',
@ -182,14 +185,14 @@ export const Models: Component = () => {
                  { id: 'last_error', header: 'Last Error', cell: (item) => <span title={item.last_error ?? '-'}>{item.last_error ?? '-'}</span> },
                ]}
                getRowKey={(item) => item.backend_id}
-                loading={overview.loading}
+                loading={overview.loading && (currentOverview()?.backends.length ?? 0) === 0}
              />
            </Show>
          </Panel>

          <Panel title="Model Catalog" description="Unique models and the backend names currently advertising each one.">
            <Show
-              when={modelCatalogRows().length > 0}
+              when={modelCatalogRows().length > 0 || overview.loading}
              fallback={<EmptyState title="No cached models yet" description="Model catalog entries appear here after backend model snapshots are available." />}
            >
              <DataGrid
@ -216,7 +219,7 @@ export const Models: Component = () => {
                  },
                ]}
                getRowKey={(item) => item.model_id}
-                loading={overview.loading}
+                loading={overview.loading && modelCatalogRows().length === 0}
              />
            </Show>
          </Panel>
@ -229,11 +232,11 @@ export const Models: Component = () => {
        >
          <div class="ui-stack ui-stack--tight">
            <Show
-              when={(rules()?.length ?? 0) > 0}
+              when={(currentRules()?.length ?? 0) > 0 || rules.loading}
              fallback={<EmptyState title="No rewrite rules" description="Requests currently route using the original model name." />}
            >
              <DataGrid
-                rows={rules() ?? []}
+                rows={currentRules() ?? []}
                columns={[
                  { id: 'source_model', header: 'Source', cell: (rule) => <span>{rule.source_model}</span> },
                  { id: 'target_model', header: 'Target', cell: (rule) => <span>{rule.target_model}</span> },
@ -242,7 +245,7 @@ export const Models: Component = () => {
                  { id: 'note', header: 'Note', cell: (rule) => <span title={rule.note ?? '-'}>{rule.note ?? '-'}</span> },
                ]}
                getRowKey={(rule) => rule.id}
-                loading={rules.loading}
+                loading={rules.loading && (currentRules()?.length ?? 0) === 0}
                rowActions={(rule) => (
                  <div class="ui-row-actions">
                    <IconButton icon={<Pencil />} label="Edit" onClick={() => openEditDialog(rule)} />
--- a/client/src/routes/Scripts.tsx
+++ b/client/src/routes/Scripts.tsx
@ -107,6 +107,9 @@ export const Scripts: Component = () => {
  const [scripts, { refetch: refetchScripts }] = createResource(() => api.scripts.getAll());
  const [users, { refetch: refetchUsers }] = createResource(() => api.users.getAll());
  const [backends, { refetch: refetchBackends }] = createResource(() => api.backends.getAll());
+  const currentScripts = createMemo(() => scripts.state === 'ready' || scripts.state === 'refreshing' ? scripts.latest : undefined);
+  const currentUsers = createMemo(() => users.state === 'ready' || users.state === 'refreshing' ? users.latest : undefined);
+  const currentBackends = createMemo(() => backends.state === 'ready' || backends.state === 'refreshing' ? backends.latest : undefined);
  const [form, setForm] = createSignal<ScriptFormState>(emptyForm());
  const [selectedScriptId, setSelectedScriptId] = createSignal<number | null>(null);
  const [pendingDeleteScript, setPendingDeleteScript] = createSignal<UserScript | null>(null);
@ -116,11 +119,11 @@ export const Scripts: Component = () => {
  const [testResult, setTestResult] = createSignal<{ success: boolean; error?: string; executionTime?: number } | null>(null);
  const [testing, setTesting] = createSignal(false);

-  const userOptions = createMemo(() => (users() ?? []).map((user) => ({ value: String(user.id), label: user.name })));
-  const backendOptions = createMemo(() => (backends() ?? []).map((backend) => ({ value: String(backend.id), label: backend.name })));
+  const userOptions = createMemo(() => (currentUsers() ?? []).map((user) => ({ value: String(user.id), label: user.name })));
+  const backendOptions = createMemo(() => (currentBackends() ?? []).map((backend) => ({ value: String(backend.id), label: backend.name })));

-  const activeCount = createMemo(() => (scripts() ?? []).filter((script) => script.is_active).length);
-  const selectedScript = createMemo(() => (scripts() ?? []).find((script) => script.id === selectedScriptId()) ?? null);
+  const activeCount = createMemo(() => (currentScripts() ?? []).filter((script) => script.is_active).length);
+  const selectedScript = createMemo(() => (currentScripts() ?? []).find((script) => script.id === selectedScriptId()) ?? null);

  const syncForm = (script?: UserScript | null) => {
    if (!script) {
@ -144,8 +147,8 @@ export const Scripts: Component = () => {
  };

  const getTargetLabel = (script: Pick<UserScript, 'script_type' | 'target_user_id' | 'target_backend_id'>) => {
-    const user = (users() ?? []).find((item) => item.id === script.target_user_id);
-    const backend = (backends() ?? []).find((item) => item.id === script.target_backend_id);
+    const user = (currentUsers() ?? []).find((item) => item.id === script.target_user_id);
+    const backend = (currentBackends() ?? []).find((item) => item.id === script.target_backend_id);

    if (script.script_type === 'per-user-backend') {
      return {
@ -275,8 +278,8 @@ export const Scripts: Component = () => {
    setTestResult(null);
    try {
      const result = await api.scripts.test(current.id, {
-        user: users()?.[0] || undefined,
-        backend: backends()?.[0] || undefined,
+        user: currentUsers()?.[0] || undefined,
+        backend: currentBackends()?.[0] || undefined,
        request: {
          method: 'POST',
          path: '/v1/chat/completions',
@ -329,11 +332,11 @@ export const Scripts: Component = () => {
            bodyClass="ui-stack ui-stack--tight"
          >
            <Show
-              when={!scripts.loading || (scripts()?.length ?? 0) > 0}
+              when={!scripts.loading || (currentScripts()?.length ?? 0) > 0}
              fallback={<EmptyState title="Loading scripts" description="Reading middleware definitions and target mappings." />}
            >
              <Show
-                when={(scripts()?.length ?? 0) > 0}
+                when={(currentScripts()?.length ?? 0) > 0}
                fallback={
                  <EmptyState
                    title="No scripts yet"
@ -345,7 +348,7 @@ export const Scripts: Component = () => {
                }
              >
                <DataGrid
-                  rows={scripts() ?? []}
+                  rows={currentScripts() ?? []}
                  columns={[
                    {
                      id: 'name',
@ -377,7 +380,7 @@ export const Scripts: Component = () => {
                    },
                  ]}
                  getRowKey={(script) => script.id}
-                  loading={scripts.loading}
+                  loading={scripts.loading && (currentScripts()?.length ?? 0) === 0}
                  onRowClick={(script) => syncForm(script)}
                  rowActions={(script) => (
                    <div class="ui-row-actions">
--- a/client/src/routes/Users.tsx
+++ b/client/src/routes/Users.tsx
@ -38,6 +38,7 @@ interface UserFormState {
  api_key: string;
  is_active: boolean;
  detail_logging: boolean;
+  copy_reasoning_to_reasoning_content: boolean;
 }

 const emptyForm = (): UserFormState => ({
@ -46,6 +47,7 @@ const emptyForm = (): UserFormState => ({
  api_key: '',
  is_active: true,
  detail_logging: false,
+  copy_reasoning_to_reasoning_content: false,
 });

 const maskApiKey = (apiKey: string) => `${apiKey.slice(0, 5)}...`;
@ -54,6 +56,9 @@ export const Users: Component = () => {
  const [users, { refetch: refetchUsers }] = createResource(() => api.users.getAll());
  const [backends] = createResource(() => api.backends.getAll());
  const [permissions, { refetch: refetchPermissions }] = createResource(() => api.permissions.getAll());
+  const currentUsers = createMemo(() => users.state === 'ready' || users.state === 'refreshing' ? users.latest : undefined);
+  const currentBackends = createMemo(() => backends.state === 'ready' || backends.state === 'refreshing' ? backends.latest : undefined);
+  const currentPermissions = createMemo(() => permissions.state === 'ready' || permissions.state === 'refreshing' ? permissions.latest : undefined);
  const [query, setQuery] = createSignal('');
  const [dialogOpen, setDialogOpen] = createSignal(false);
  const [userDeleteConfirmOpen, setUserDeleteConfirmOpen] = createSignal(false);
@ -70,7 +75,7 @@ export const Users: Component = () => {

  const filteredUsers = createMemo(() => {
    const value = query().trim().toLowerCase();
-    const list = users() ?? [];
+    const list = currentUsers() ?? [];
    if (!value) return list;
    return list.filter((user) => {
      const haystack = [user.name, user.email ?? '', user.api_key].join(' ').toLowerCase();
@ -78,29 +83,29 @@ export const Users: Component = () => {
    });
  });

-  const activeCount = createMemo(() => (users() ?? []).filter((user) => user.is_active).length);
-  const selectedUser = createMemo(() => (users() ?? []).find((user) => user.id === selectedUserId()) ?? null);
+  const activeCount = createMemo(() => (currentUsers() ?? []).filter((user) => user.is_active).length);
+  const selectedUser = createMemo(() => (currentUsers() ?? []).find((user) => user.id === selectedUserId()) ?? null);
  const permissionsForSelectedUser = createMemo(() => {
    const currentUserId = selectedUserId();
    if (!currentUserId) return [];
-    return (permissions() ?? []).filter((permission) => permission.user_id === currentUserId);
+    return (currentPermissions() ?? []).filter((permission) => permission.user_id === currentUserId);
  });
  const assignedBackendIds = createMemo(() => new Set(permissionsForSelectedUser().map((permission) => permission.backend_id)));
  const availableBackendOptions = createMemo(() =>
-    (backends() ?? [])
+    (currentBackends() ?? [])
      .filter((backend) => !assignedBackendIds().has(backend.id))
      .map((backend) => ({ value: String(backend.id), label: backend.name }))
  );
  const backendNameById = createMemo(() => {
    const names = new Map<number, string>();
-    for (const backend of backends() ?? []) {
+    for (const backend of currentBackends() ?? []) {
      names.set(backend.id, backend.name);
    }
    return names;
  });

  createEffect(() => {
-    const list = users() ?? [];
+    const list = currentUsers() ?? [];
    const currentSelectedUserId = selectedUserId();

    if (list.length === 0) {
@ -129,6 +134,7 @@ export const Users: Component = () => {
      api_key: user.api_key,
      is_active: user.is_active,
      detail_logging: user.detail_logging,
+      copy_reasoning_to_reasoning_content: user.copy_reasoning_to_reasoning_content,
    });
    setDialogOpen(true);
  };
@ -151,6 +157,7 @@ export const Users: Component = () => {
          api_key: current.api_key.trim() || undefined,
          is_active: current.is_active,
          detail_logging: current.detail_logging,
+          copy_reasoning_to_reasoning_content: current.copy_reasoning_to_reasoning_content,
        });
        setNotice({ tone: 'success', message: 'User updated.' });
      } else {
@ -159,6 +166,7 @@ export const Users: Component = () => {
          email: current.email.trim() || undefined,
          api_key: current.api_key.trim() || undefined,
          detail_logging: current.detail_logging,
+          copy_reasoning_to_reasoning_content: current.copy_reasoning_to_reasoning_content,
        });
        setNotice({ tone: 'success', message: 'User created.' });
      }
@ -362,6 +370,11 @@ export const Users: Component = () => {
                      header: 'Detail Log',
                      cell: (user) => <StatusBadge tone={user.detail_logging ? 'warning' : 'neutral'}>{user.detail_logging ? 'On' : 'Off'}</StatusBadge>,
                    },
+                    {
+                      id: 'reasoning_compat',
+                      header: 'Reasoning Compat',
+                      cell: (user) => <StatusBadge tone={user.copy_reasoning_to_reasoning_content ? 'success' : 'neutral'}>{user.copy_reasoning_to_reasoning_content ? 'On' : 'Off'}</StatusBadge>,
+                    },
                    {
                      id: 'status',
                      header: 'Status',
@ -369,7 +382,7 @@ export const Users: Component = () => {
                    },
                  ]}
                  getRowKey={(user) => user.id}
-                  loading={users.loading}
+                  loading={users.loading && filteredUsers().length === 0}
                  emptyMessage="No users match the current search."
                  onRowClick={(user) => setSelectedUserId(user.id)}
                  rowActions={(user) => (
@ -455,7 +468,7 @@ export const Users: Component = () => {
                          },
                        ]}
                        getRowKey={(permission) => `${permission.user_id}-${permission.backend_id}`}
-                        loading={permissions.loading || backends.loading}
+                        loading={(permissions.loading || backends.loading) && permissionsForSelectedUser().length === 0}
                        rowActions={(permission) => (
                          <IconButton
                            variant="danger"
@ -526,6 +539,12 @@ export const Users: Component = () => {
              checked={form().detail_logging}
              onChange={(checked) => setForm((current) => ({ ...current, detail_logging: checked }))}
            />
+            <Checkbox
+              label="Copy reasoning to reasoning_content"
+              description="Enable for clients that only display thinking from reasoning_content."
+              checked={form().copy_reasoning_to_reasoning_content}
+              onChange={(checked) => setForm((current) => ({ ...current, copy_reasoning_to_reasoning_content: checked }))}
+            />
          </form>
        </FormDialog>

--- a/client/src/types/index.ts
+++ b/client/src/types/index.ts
@ -5,6 +5,7 @@ export type User = {
  email?: string;
  is_active: boolean;
  detail_logging: boolean;
+  copy_reasoning_to_reasoning_content: boolean;
  created_at: string;
  updated_at: string;
 };
--- a/client/src/ui/patterns/Charts.tsx
+++ b/client/src/ui/patterns/Charts.tsx
@ -214,6 +214,7 @@ interface TimeSeriesChartProps {
  formatLeftValue?: (value: number) => string;
  formatRightValue?: (value: number) => string;
  tooltipTitle?: string;
+  yScaleType?: 'linear' | 'log';
 }

 interface ChartLegendProps {
@ -287,32 +288,82 @@ export function TimeSeriesChart(props: TimeSeriesChartProps) {
  const leftSeries = createMemo(() => visibleSeries().filter((series) => series.axis !== 'right'));
  const rightSeries = createMemo(() => visibleSeries().filter((series) => series.axis === 'right'));

+  const isLogScale = () => props.yScaleType === 'log';
+
  const leftScale = createMemo(() => {
-    const maxValue =
-      d3.max(points(), (point: ParsedTimeSeriesDatum) =>
-        d3.max(leftSeries(), (series: TimeSeriesChartSeries) => Number(point[series.key] ?? 0))
-      ) ?? 0;
-    return d3.scaleLinear().domain([0, maxValue === 0 ? 1 : maxValue * 1.1]).nice().range([dimensions().marginTop + getInnerHeight(dimensions()), dimensions().marginTop]);
+    const values = points().flatMap((point: ParsedTimeSeriesDatum) =>
+      leftSeries().map((series: TimeSeriesChartSeries) => Number(point[series.key] ?? 0))
+    );
+    const maxValue = d3.max(values) ?? 0;
+    const range = [dimensions().marginTop + getInnerHeight(dimensions()), dimensions().marginTop];
+
+    if (isLogScale()) {
+      const positiveValues = values.filter((v) => v > 0);
+      const minLog = positiveValues.length > 0 ? d3.min(positiveValues) ?? 1 : 1;
+      const maxLog = maxValue === 0 ? 10 : maxValue * 1.1;
+      return d3.scaleLog().domain([minLog, maxLog]).range(range);
+    }
+
+    return d3.scaleLinear().domain([0, maxValue === 0 ? 1 : maxValue * 1.1]).nice().range(range);
  });

  const rightScale = createMemo(() => {
-    const maxValue =
-      d3.max(points(), (point: ParsedTimeSeriesDatum) =>
-        d3.max(rightSeries(), (series: TimeSeriesChartSeries) => Number(point[series.key] ?? 0))
-      ) ?? 0;
-    return d3.scaleLinear().domain([0, maxValue === 0 ? 1 : maxValue * 1.1]).nice().range([dimensions().marginTop + getInnerHeight(dimensions()), dimensions().marginTop]);
+    const values = points().flatMap((point: ParsedTimeSeriesDatum) =>
+      rightSeries().map((series: TimeSeriesChartSeries) => Number(point[series.key] ?? 0))
+    );
+    const maxValue = d3.max(values) ?? 0;
+    const range = [dimensions().marginTop + getInnerHeight(dimensions()), dimensions().marginTop];
+
+    if (isLogScale()) {
+      const positiveValues = values.filter((v) => v > 0);
+      const minLog = positiveValues.length > 0 ? d3.min(positiveValues) ?? 1 : 1;
+      const maxLog = maxValue === 0 ? 10 : maxValue * 1.1;
+      return d3.scaleLog().domain([minLog, maxLog]).range(range);
+    }
+
+    return d3.scaleLinear().domain([0, maxValue === 0 ? 1 : maxValue * 1.1]).nice().range(range);
  });

-  const leftTicks = createMemo(() => leftScale().ticks(4));
-  const rightTicks = createMemo(() => rightSeries().length > 0 ? rightScale().ticks(4) : []);
+  const leftTicks = createMemo(() => {
+    if (isLogScale()) {
+      const maxValue = d3.max(points(), (point: ParsedTimeSeriesDatum) =>
+        d3.max(leftSeries(), (series: TimeSeriesChartSeries) => Number(point[series.key] ?? 0))
+      ) ?? 0;
+      return getSymlogTicks(maxValue, 8).filter((tick) => tick > 0);
+    }
+    return leftScale().ticks(4);
+  });
+  const rightTicks = createMemo(() => {
+    if (rightSeries().length === 0) {
+      return [];
+    }
+    if (isLogScale()) {
+      const maxValue = d3.max(points(), (point: ParsedTimeSeriesDatum) =>
+        d3.max(rightSeries(), (series: TimeSeriesChartSeries) => Number(point[series.key] ?? 0))
+      ) ?? 0;
+      return getSymlogTicks(maxValue, 8).filter((tick) => tick > 0);
+    }
+    return rightScale().ticks(4);
+  });
  const xTicks = createMemo(() => xScale().ticks(Math.max(2, Math.floor(getInnerWidth(dimensions()) / 120))));
  const dateTicks = createMemo(() => getDateTicks(points().map((point) => point.parsedDate), getInnerWidth(dimensions())));

-  const linePath = (series: TimeSeriesChartSeries) =>
-    d3.line()
-      .defined((point: ParsedTimeSeriesDatum) => typeof point[series.key] === 'number')
+  const linePath = (series: TimeSeriesChartSeries) => {
+    const scale = series.axis === 'right' ? rightScale() : leftScale();
+    return d3.line()
+      .defined((point: ParsedTimeSeriesDatum) => {
+        const value = Number(point[series.key] ?? 0);
+        if (!Number.isFinite(value)) {
+          return false;
+        }
+        if (isLogScale() && value <= 0) {
+          return false;
+        }
+        return true;
+      })
      .x((point: ParsedTimeSeriesDatum) => xScale()(point.parsedDate))
-      .y((point: ParsedTimeSeriesDatum) => (series.axis === 'right' ? rightScale() : leftScale())(Number(point[series.key] ?? 0)))(points()) ?? '';
+      .y((point: ParsedTimeSeriesDatum) => scale(Number(point[series.key] ?? 0)))(points()) ?? '';
+  };

  const hoveredPoint = createMemo(() => {
    const index = hoverIndex();
@ -326,7 +377,15 @@ export function TimeSeriesChart(props: TimeSeriesChartProps) {
            ...series,
            value: Number(hoveredPoint()?.[series.key] ?? 0),
          }))
-          .filter((series) => Number.isFinite(series.value))
+          .filter((series) => {
+            if (!Number.isFinite(series.value)) {
+              return false;
+            }
+            if (isLogScale() && series.value <= 0) {
+              return false;
+            }
+            return true;
+          })
      : []
  );

--- a/client/src/ui/patterns/ConversationTimeline.tsx
+++ b/client/src/ui/patterns/ConversationTimeline.tsx
@ -70,6 +70,24 @@ function prettyJson(value: unknown): string {
  }
 }

+function hasMeaningfulToolCall(value: unknown): boolean {
+  if (value === undefined || value === null) return false;
+  if (typeof value === 'string') return value.trim().length > 0;
+  if (Array.isArray(value)) return value.some((item) => hasMeaningfulToolCall(item));
+  if (isRecord(value)) {
+    return Object.entries(value).some(([key, item]) => key !== 'index' && hasMeaningfulToolCall(item));
+  }
+  return true;
+}
+
+function normalizeToolCalls(value: unknown): string | undefined {
+  if (!hasMeaningfulToolCall(value)) return undefined;
+
+  const rendered = prettyJson(value).trim();
+  if (!rendered || rendered === '[]' || rendered === '{}') return undefined;
+  return rendered;
+}
+
 function normalizePayload(value: unknown): Record<string, unknown> | null {
  if (!value) return null;

@ -113,7 +131,7 @@ function normalizeCompactStreamResponse(payload: Record<string, unknown> | null)
            role: typeof choice.role === 'string' ? choice.role : 'assistant',
            content: stringifyValue(choice.content),
            reasoning: stringifyValue(choice.reasoning).trim() || undefined,
-            toolCalls: choice.tool_calls !== undefined ? prettyJson(choice.tool_calls) : undefined,
+            toolCalls: normalizeToolCalls(choice.tool_calls),
            metadata,
          };
        })
@ -152,7 +170,7 @@ function normalizeAssistantMessages(payload: Record<string, unknown> | null): Pa
      const messageRecord = message as Record<string, unknown>;
      const content = stringifyValue(messageRecord.content);
      const reasoning = stringifyValue(messageRecord.reasoning_content ?? messageRecord.reasoning).trim();
-      const toolCalls = messageRecord.tool_calls !== undefined ? prettyJson(messageRecord.tool_calls) : undefined;
+      const toolCalls = normalizeToolCalls(messageRecord.tool_calls);
      const metadata = [
        (choice as Record<string, unknown>).finish_reason !== undefined
          ? { key: 'Finish', value: String((choice as Record<string, unknown>).finish_reason) }
@ -270,8 +288,12 @@ function parseStreamResponse(value: unknown): ParsedStreamResponse | null {
      if (isRecord(delta)) {
        if (typeof delta.role === 'string') choice.role = delta.role;
        if (typeof delta.content === 'string') choice.content.push(delta.content);
-        if (typeof delta.reasoning === 'string') choice.reasoning.push(delta.reasoning);
-        if (typeof delta.reasoning_content === 'string') choice.reasoning.push(delta.reasoning_content);
+        const reasoning = typeof delta.reasoning_content === 'string'
+          ? delta.reasoning_content
+          : typeof delta.reasoning === 'string'
+            ? delta.reasoning
+            : undefined;
+        if (reasoning) choice.reasoning.push(reasoning);

        if (Array.isArray(delta.tool_calls)) {
          for (const rawToolCall of delta.tool_calls) {
@ -306,7 +328,7 @@ function parseStreamResponse(value: unknown): ParsedStreamResponse | null {
        role: choice.role ?? 'assistant',
        content: choice.content.join(''),
        reasoning: choice.reasoning.join('') || undefined,
-        toolCalls: toolCalls.length > 0 ? prettyJson(toolCalls) : undefined,
+        toolCalls: normalizeToolCalls(toolCalls),
        metadata,
      };
    })
@ -398,8 +420,8 @@ export function ConversationTimeline(props: ConversationTimelineProps) {
      typeof request?.model === 'string' ? { key: 'Model', value: request.model } : null,
      request?.temperature !== undefined ? { key: 'Temp', value: String(request.temperature) } : null,
      typeof stream?.model === 'string' && stream.model !== request?.model ? { key: 'Response Model', value: stream.model } : null,
-      typeof response?.created === 'number' ? { key: 'Created', value: String(response.created) } : null,
-      typeof stream?.created === 'number' ? { key: 'Created', value: String(stream.created) } : null,
+      typeof response?.created === 'number' ? { key: 'Res. Created', value: String(response.created) } : null,
+      // typeof stream?.created === 'number' ? { key: 'Stream Created', value: String(stream.created) } : null,
      responseUsage?.prompt_tokens !== undefined ? { key: 'Prompt', value: String(responseUsage.prompt_tokens) } : null,
      responseUsage?.completion_tokens !== undefined ? { key: 'Completion', value: String(responseUsage.completion_tokens) } : null,
      responseUsage?.total_tokens !== undefined ? { key: 'Total', value: String(responseUsage.total_tokens) } : null,
--- a/client/src/ui/styles/base.css
+++ b/client/src/ui/styles/base.css
@ -86,3 +86,10 @@ select {
  height: 1px;
  background: var(--color-border);
 }
+
+.ui-divider--vertical {
+  width: 1px;
+  height: 1.5em;
+  background: var(--color-border);
+  align-self: center;
+}
--- a/client/src/ui/styles/patterns.css
+++ b/client/src/ui/styles/patterns.css
@ -646,6 +646,18 @@
  min-width: 180px;
 }

+.dashboard__refresh-button {
+  min-width: 116px;
+}
+
+.detail-logs__refresh-button {
+  min-width: 116px;
+}
+
+.analytics__refresh-button {
+  min-width: 116px;
+}
+
 .analytics__grid--wide {
  grid-template-columns: 1.5fr minmax(340px, 1fr);
 }
--- a/client/src/ui/styles/primitives.css
+++ b/client/src/ui/styles/primitives.css
@ -66,6 +66,10 @@
  cursor: not-allowed;
 }

+.ui-button--loading svg {
+  animation: ui-button-spin 0.8s linear infinite;
+}
+
 .ui-field {
  display: grid;
  gap: var(--space-2);
@ -445,3 +449,15 @@
    padding: var(--space-4);
  }
 }
+
+@media (prefers-reduced-motion: reduce) {
+  .ui-button--loading svg {
+    animation: none;
+  }
+}
+
+@keyframes ui-button-spin {
+  to {
+    transform: rotate(360deg);
+  }
+}
--- a/database/analytics-schema.sql
+++ b/database/analytics-schema.sql
@ -28,5 +28,8 @@ CREATE TABLE IF NOT EXISTS backend_metrics (
 -- Indexes for performance
 CREATE INDEX IF NOT EXISTS idx_usage_stats_user ON usage_stats(user_id);
 CREATE INDEX IF NOT EXISTS idx_usage_stats_date ON usage_stats(date);
+CREATE INDEX IF NOT EXISTS idx_usage_stats_backend_date ON usage_stats(backend_id, date);
+CREATE INDEX IF NOT EXISTS idx_usage_stats_user_backend_date ON usage_stats(user_id, backend_id, date);
 CREATE INDEX IF NOT EXISTS idx_backend_metrics_backend ON backend_metrics(backend_id);
 CREATE INDEX IF NOT EXISTS idx_backend_metrics_date ON backend_metrics(date);
+CREATE INDEX IF NOT EXISTS idx_backend_metrics_backend_date ON backend_metrics(backend_id, date);
--- a/database/request-logs-schema.sql
+++ b/database/request-logs-schema.sql
@ -23,7 +23,9 @@ CREATE TABLE IF NOT EXISTS request_logs (

 CREATE INDEX IF NOT EXISTS idx_request_logs_created_at ON request_logs(created_at);
 CREATE INDEX IF NOT EXISTS idx_request_logs_local_date ON request_logs(local_date);
+CREATE INDEX IF NOT EXISTS idx_request_logs_local_date_backend ON request_logs(local_date, backend_id);
 CREATE INDEX IF NOT EXISTS idx_request_logs_user ON request_logs(user_id);
 CREATE INDEX IF NOT EXISTS idx_request_logs_backend ON request_logs(backend_id);
 CREATE INDEX IF NOT EXISTS idx_request_logs_endpoint ON request_logs(endpoint);
 CREATE INDEX IF NOT EXISTS idx_request_logs_detail_logged ON request_logs(detail_logged);
+CREATE INDEX IF NOT EXISTS idx_request_logs_completion_tokens ON request_logs(completion_tokens);
--- a/database/schema.sql
+++ b/database/schema.sql
@ -9,6 +9,7 @@ CREATE TABLE IF NOT EXISTS users (
    email TEXT,
    is_active BOOLEAN DEFAULT 1,
    detail_logging INTEGER NOT NULL DEFAULT 0,
+    copy_reasoning_to_reasoning_content INTEGER NOT NULL DEFAULT 0,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
 );
--- a/docs/api.md
+++ b/docs/api.md
@ -24,9 +24,11 @@

 추가 동작:
 - `/v1/chat/completions` 는 요청 모델명을 먼저 전역 rewrite 체인으로 해석한 뒤, 최종 모델을 서빙하는 허용 가능한 활성 백엔드만 후보로 사용한다
+- 사용자 옵션 `copy_reasoning_to_reasoning_content` 가 켜져 있으면 chat completion 응답의 `reasoning` 필드를 `reasoning_content` 로 추가 복제한다. streaming/non-stream 모두 적용되며 기존 `reasoning_content` 는 덮어쓰지 않는다
 - `force=true` rewrite 는 항상 적용되고 target 모델의 다음 규칙까지 계속 평가한다
 - `force=false` rewrite 는 현재 모델을 서빙하는 허용 가능한 활성 백엔드가 없을 때만 fallback 으로 적용되고 target 모델의 다음 규칙까지 계속 평가한다
 - `/v1/models` 는 native backend 모델뿐 아니라 현재 사용자 권한에서 최종 후보가 있는 rewrite source alias도 함께 반환한다
+- `MODEL_LIST_INCLUDE_ROUTING_METADATA=1|true|yes|on` 이면 `/v1/models` 의 각 model object에 비표준 `kyush_router` metadata를 추가한다. 이 metadata는 `requested_model`, `routed_model`, `was_rewritten`, `rule_type`, `rewrite_path` 를 포함한다
 - 최종 후보가 없으면 모델 미지원 오류를 반환하고 `request_model`, `routed_model` 을 함께 내려준다

 ## Admin API
@ -53,9 +55,9 @@
 | Method | Path | Description |
 |--------|------|-------------|
 | GET | `/admin/users` | 전체 사용자 목록 |
-| POST | `/admin/users` | 사용자 생성 (`api_key` 생략 시 자동 발급, 지정 시 수동 등록) |
+| POST | `/admin/users` | 사용자 생성 (`api_key` 생략 시 자동 발급, 지정 시 수동 등록, copy_reasoning_to_reasoning_content 선택 가능) |
 | GET | `/admin/users/:id` | 사용자 조회 |
-| PUT | `/admin/users/:id` | 사용자 수정 (name, email, api_key, is_active, detail_logging) |
+| PUT | `/admin/users/:id` | 사용자 수정 (name, email, api_key, is_active, detail_logging, copy_reasoning_to_reasoning_content) |
 | DELETE | `/admin/users/:id` | 사용자 삭제 |
 | POST | `/admin/users/:id/regenerate-api-key` | API 키 재발급 |

--- a/docs/client.md
+++ b/docs/client.md
@ -83,3 +83,8 @@ SPA는 `/dashboard`를 라우터 base로 사용하고, 관리자 API는 계속 `
  - `Force`: 현재 모델 사용 가능 여부와 관계없이 항상 target model 로 이동하고 다음 규칙을 계속 평가
  - `Fallback`: 현재 모델을 서빙하는 허용 가능한 활성 백엔드가 없을 때만 target model 로 이동하고 다음 규칙을 계속 평가
 - 활성 rewrite cycle은 저장 시점에 거부되며, `/v1/models` 는 실제 요청 가능한 rewrite alias를 함께 반환한다
+
+## User Reasoning Compatibility
+
+- `Users` 화면은 API 키별 `Copy reasoning to reasoning_content` 옵션을 표시하고 편집한다
+- 이 옵션은 같은 백엔드를 공유하는 사용자라도 downstream 클라이언트 호환성에 맞춰 독립적으로 켜거나 끌 수 있다
--- a/docs/database.md
+++ b/docs/database.md
@ -18,6 +18,7 @@ DB는 `DB_DIR` 하위에 분리 저장된다.
 | email | TEXT | |
 | is_active | BOOLEAN | DEFAULT 1 |
 | detail_logging | INTEGER | NOT NULL DEFAULT 0 |
+| copy_reasoning_to_reasoning_content | INTEGER | NOT NULL DEFAULT 0 |
 | created_at | TIMESTAMP | DEFAULT CURRENT_TIMESTAMP |
 | updated_at | TIMESTAMP | DEFAULT CURRENT_TIMESTAMP |

--- a/docs/model-routing.md
+++ b/docs/model-routing.md
@ -19,6 +19,7 @@
 2. 접근 가능한 활성 백엔드의 메모리 카탈로그를 확인
 3. native backend 모델과 rewrite `source_model` alias를 같은 체인 해석기로 평가
 4. 최종 모델 후보가 있는 requestable 모델 ID 합집합을 반환
+5. `MODEL_LIST_INCLUDE_ROUTING_METADATA` 가 켜져 있으면 각 model object에 비표준 `kyush_router` routing metadata를 추가한다

 ## Caching Rules

@ -49,6 +50,8 @@
 - 활성 rewrite 그래프에 cycle이 생기는 관리자 생성/수정은 거부된다
 - 직접 DB 조작 등으로 runtime cycle이 발견되면 라우터는 설정 오류를 반환한다
 - 체인 평가는 요청별 allowed backend set과 candidate memo를 사용해 반복 DB 조회를 피한다
+- `/v1/models` 의 `kyush_router` metadata는 적용된 rewrite hop만 `rewrite_path` 에 담는다. 후보가 있어 fallback이 중단된 규칙은 path에 포함하지 않는다
+- `kyush_router` 는 public routing 설명용이며 backend id/name 같은 내부 라우팅 대상 정보는 포함하지 않는다

 예시:
 `AutoModelTranslate -(Force)-> Qwen3.5 -(Force)-> Qwen/Qwen3.5-397B-A17B-FP8 -(Fallback)-> Gemma4 -(Force)-> cyankiwi/gemma-4-26B-A4B-it-AWQ-4bit`
--- a/docs/scripts.md
+++ b/docs/scripts.md
@ -20,6 +20,8 @@ isolated-vm 기반 JavaScript 샌드박스에서 요청/응답을 조작하는

 백엔드 응답 수신 후 실행. 현재 구현에서는 응답 컨텍스트를 검사하거나 로그/부가 처리를 수행하는 용도로 실행되며, 훅이 반환한 변경 내용이 최종 HTTP 응답에 다시 반영되지는 않는다.

+참고: `reasoning` 을 `reasoning_content` 로 복제하는 OpenAI-compatible 호환 처리는 script hook이 아니라 사용자별 라우터 내장 옵션 `copy_reasoning_to_reasoning_content` 로 수행한다.
+
 ## Script Context

 스크립트에서 접근 가능한 데이터:
--- a/docs/server.md
+++ b/docs/server.md
@ -68,6 +68,14 @@ server/src/
 - 활성 rewrite cycle은 관리자 생성/수정 시 거부하고, runtime에서도 방어한다
 - 최종 모델을 서빙하는 허용 가능한 활성 백엔드가 없으면 `/v1/chat/completions` 는 모델 미지원 오류를 반환한다
 - `/v1/models` 는 허용 가능한 활성 백엔드들의 native 모델과 실제 요청 가능한 rewrite alias 합집합을 반환한다
+- `MODEL_LIST_INCLUDE_ROUTING_METADATA` 가 켜져 있으면 `/v1/models` 는 비표준 `kyush_router` metadata를 추가해 요청 모델, 최종 라우팅 모델, 적용된 rewrite path를 노출한다.
+
+## Reasoning Compatibility
+
+- 사용자별 `copy_reasoning_to_reasoning_content` 옵션이 켜져 있으면 `/v1/chat/completions` 응답에서 `reasoning` 을 `reasoning_content` 로 추가 복제한다
+- 같은 백엔드라도 API 키별로 옵션을 다르게 둘 수 있다
+- streaming 응답은 옵션이 켜진 경우에만 SSE JSON frame을 변환하고, 옵션이 꺼진 경우 기존처럼 원본 바이트를 전달한다
+- 이미 `reasoning_content` 가 있으면 덮어쓰지 않고 `reasoning` 원본도 유지한다

 참고:
 - 세부 라우팅 규칙과 캐시 트리거는 [docs/model-routing.md](./model-routing.md) 참고
--- a/package.json
+++ b/package.json
@ -1,6 +1,6 @@
 {
  "name": "kyush-llm-router-express",
-  "version": "1.0.5-express",
+  "version": "1.0.10-express",
  "description": "LLM routing server with multi-user API key management",
  "scripts": {
    "dev": "pnpm --parallel dev",
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@ -2,6 +2,11 @@ packages:
  - server
  - client

+allowBuilds:
+  better-sqlite3: true
+  esbuild: true
+  isolated-vm: true
+
 onlyBuiltDependencies:
  - better-sqlite3
  - esbuild
--- a/server/src/config/analytics-db.ts
+++ b/server/src/config/analytics-db.ts
@ -3,6 +3,25 @@ import path from 'path';
 import fs from 'fs';
 import { ensureDir, getAnalyticsDbPath } from './db-paths';

+function hasIndex(database: Database.Database, tableName: string, indexName: string): boolean {
+  const result = database.prepare(`SELECT name FROM sqlite_master WHERE type = 'index' AND tbl_name = ? AND name = ?`).get(tableName, indexName) as { name: string } | undefined;
+  return Boolean(result);
+}
+
+function ensureAnalyticsIndexes(db: Database.Database): void {
+  const indexes: Array<{ name: string; table: string; sql: string }> = [
+    { name: 'idx_usage_stats_backend_date', table: 'usage_stats', sql: 'CREATE INDEX IF NOT EXISTS idx_usage_stats_backend_date ON usage_stats(backend_id, date)' },
+    { name: 'idx_usage_stats_user_backend_date', table: 'usage_stats', sql: 'CREATE INDEX IF NOT EXISTS idx_usage_stats_user_backend_date ON usage_stats(user_id, backend_id, date)' },
+    { name: 'idx_backend_metrics_backend_date', table: 'backend_metrics', sql: 'CREATE INDEX IF NOT EXISTS idx_backend_metrics_backend_date ON backend_metrics(backend_id, date)' },
+  ];
+
+  for (const { name, table, sql } of indexes) {
+    if (!hasIndex(db, table, name)) {
+      db.exec(sql);
+    }
+  }
+}
+
 let db: Database.Database;

 export function getAnalyticsDb(): Database.Database {
@ -16,6 +35,7 @@ export function getAnalyticsDb(): Database.Database {
    const schemaPath = path.join(__dirname, '..', '..', '..', 'database', 'analytics-schema.sql');
    const schema = fs.readFileSync(schemaPath, 'utf-8');
    db.exec(schema);
+    ensureAnalyticsIndexes(db);
  }
  return db;
 }
--- a/server/src/config/database.ts
+++ b/server/src/config/database.ts
@ -14,6 +14,9 @@ function runCoreMigrations(database: Database.Database): void {
  if (hasColumn(database, 'model_rewrites', 'force') === false) {
    database.exec('ALTER TABLE model_rewrites ADD COLUMN force BOOLEAN DEFAULT 0');
  }
+  if (hasColumn(database, 'users', 'copy_reasoning_to_reasoning_content') === false) {
+    database.exec('ALTER TABLE users ADD COLUMN copy_reasoning_to_reasoning_content INTEGER NOT NULL DEFAULT 0');
+  }
 }

 export function getDb(): Database.Database {
--- a/server/src/config/model-list-metadata.ts
+++ b/server/src/config/model-list-metadata.ts
@ -0,0 +1,4 @@
+export function shouldIncludeModelListRoutingMetadata(): boolean {
+  const value = process.env.MODEL_LIST_INCLUDE_ROUTING_METADATA?.trim().toLowerCase();
+  return value === '1' || value === 'true' || value === 'yes' || value === 'on';
+}
--- a/server/src/config/request-logs-db.ts
+++ b/server/src/config/request-logs-db.ts
@ -20,6 +20,22 @@ function initRequestLogsSchema(db: Database.Database): void {
  }
 }

+function ensureRequestLogsIndexes(db: Database.Database): void {
+  const existingIndexes = db.prepare("SELECT name FROM sqlite_master WHERE type = 'index' AND tbl_name = 'request_logs'").all() as Array<{ name: string }>;
+  const indexNames = new Set(existingIndexes.map((idx) => idx.name));
+
+  const indexes = [
+    ['idx_request_logs_local_date_backend', 'CREATE INDEX IF NOT EXISTS idx_request_logs_local_date_backend ON request_logs(local_date, backend_id)'],
+    ['idx_request_logs_completion_tokens', 'CREATE INDEX IF NOT EXISTS idx_request_logs_completion_tokens ON request_logs(completion_tokens)'],
+  ];
+
+  for (const [name, sql] of indexes) {
+    if (!indexNames.has(name)) {
+      db.exec(sql);
+    }
+  }
+}
+
 export function getRequestLogsDb(monthKey: string = getLocalMonthKey()): Database.Database {
  const existing = connections.get(monthKey);
  if (existing) {
@ -31,6 +47,7 @@ export function getRequestLogsDb(monthKey: string = getLocalMonthKey()): Databas

  const db = new Database(dbPath);
  initRequestLogsSchema(db);
+  ensureRequestLogsIndexes(db);
  connections.set(monthKey, db);
  return db;
 }
--- a/server/src/models/User.ts
+++ b/server/src/models/User.ts
@ -7,6 +7,7 @@ export class UserModel {
  static asUser(row: any): User {
    row.is_active = !!row.is_active;
    row.detail_logging = !!row.detail_logging;
+    row.copy_reasoning_to_reasoning_content = !!row.copy_reasoning_to_reasoning_content;
    return row as User;
  }

@ -31,10 +32,11 @@ export class UserModel {
    const apiKey = data.api_key ?? generateApiKey();
    const timestamp = getUtcTimestamp();
    const detailLogging = data.detail_logging ?? false;
+    const copyReasoning = data.copy_reasoning_to_reasoning_content ?? false;
    const stmt = getDb().prepare(
-      'INSERT INTO users (api_key, name, email, detail_logging, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?)'
+      'INSERT INTO users (api_key, name, email, detail_logging, copy_reasoning_to_reasoning_content, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?, ?)'
    );
-    const result = stmt.run(apiKey, data.name, data.email || null, detailLogging ? 1 : 0, timestamp, timestamp);
+    const result = stmt.run(apiKey, data.name, data.email || null, detailLogging ? 1 : 0, copyReasoning ? 1 : 0, timestamp, timestamp);
    
    return {
      id: result.lastInsertRowid as number,
@ -43,6 +45,7 @@ export class UserModel {
      email: data.email,
      is_active: true,
      detail_logging: detailLogging,
+      copy_reasoning_to_reasoning_content: copyReasoning,
      created_at: timestamp,
      updated_at: timestamp,
    };
@ -72,6 +75,10 @@ export class UserModel {
      updates.push('detail_logging = ?');
      values.push(data.detail_logging ? 1 : 0);
    }
+    if (data.copy_reasoning_to_reasoning_content !== undefined) {
+      updates.push('copy_reasoning_to_reasoning_content = ?');
+      values.push(data.copy_reasoning_to_reasoning_content ? 1 : 0);
+    }

    if (updates.length === 0) {
      return this.findById(id);
--- a/server/src/routes/admin.ts
+++ b/server/src/routes/admin.ts
@ -47,7 +47,7 @@ router.get('/users', (req: Request, res: Response) => {
 });

 router.post('/users', (req: Request, res: Response) => {
-  const { name, email, api_key, detail_logging } = req.body as CreateUserData;
+  const { name, email, api_key, detail_logging, copy_reasoning_to_reasoning_content } = req.body as CreateUserData;

  if (!name?.trim()) {
    res.status(400).json({ error: 'Name is required' });
@ -60,6 +60,7 @@ router.post('/users', (req: Request, res: Response) => {
      email: email?.trim() || undefined,
      api_key: api_key?.trim() || undefined,
      detail_logging,
+      copy_reasoning_to_reasoning_content,
    });

    res.status(201).json(user);
@ -93,7 +94,7 @@ router.put('/users/:id', (req: Request, res: Response) => {
    return;
  }

-  const { name, email, api_key, is_active, detail_logging } = req.body as UpdateUserData;
+  const { name, email, api_key, is_active, detail_logging, copy_reasoning_to_reasoning_content } = req.body as UpdateUserData;

  if (typeof name === 'string' && !name.trim()) {
    res.status(400).json({ error: 'Name cannot be empty' });
@ -107,6 +108,7 @@ router.put('/users/:id', (req: Request, res: Response) => {
      api_key: typeof api_key === 'string' ? api_key.trim() || undefined : undefined,
      is_active,
      detail_logging,
+      copy_reasoning_to_reasoning_content,
    });

    res.json(updatedUser);
--- a/server/src/routes/analytics.ts
+++ b/server/src/routes/analytics.ts
@ -4,85 +4,117 @@ import { AnalyticsService } from '../services/AnalyticsService';
 const router: Router = Router();

 router.get('/usage', (req: Request, res: Response) => {
-  const { userId, backendId, days } = req.query;
-  const result = AnalyticsService.getUsageStats(
-    userId ? Number(userId) : undefined,
-    backendId ? Number(backendId) : undefined,
-    days ? Number(days) : 30
-  );
-  res.json(result);
+  try {
+    const { userId, backendId, days } = req.query;
+    const result = AnalyticsService.getUsageStats(
+      userId ? Number(userId) : undefined,
+      backendId ? Number(backendId) : undefined,
+      days ? Number(days) : 30
+    );
+    res.json(result);
+  } catch (error) {
+    res.status(500).json({ error: 'Failed to fetch usage stats', details: error instanceof Error ? error.message : String(error) });
+  }
 });

 router.get('/requests', (req: Request, res: Response) => {
-  const { month, date, limit, offset, q, userId, backendId, endpoint, detailLogged } = req.query;
-  const result = AnalyticsService.getRequestLogs({
-    month: typeof month === 'string' ? month : undefined,
-    date: typeof date === 'string' ? date : undefined,
-    limit: limit ? Number(limit) : 100,
-    offset: offset ? Number(offset) : 0,
-    q: typeof q === 'string' ? q : undefined,
-    userId: userId ? Number(userId) : undefined,
-    backendId: backendId ? Number(backendId) : undefined,
-    endpoint: typeof endpoint === 'string' ? endpoint : undefined,
-    detailLogged: detailLogged === undefined ? undefined : detailLogged === '1' || detailLogged === 'true',
-  });
-  res.json(result);
+  try {
+    const { month, date, limit, offset, q, userId, backendId, endpoint, detailLogged } = req.query;
+    const result = AnalyticsService.getRequestLogs({
+      month: typeof month === 'string' ? month : undefined,
+      date: typeof date === 'string' ? date : undefined,
+      limit: limit ? Number(limit) : 100,
+      offset: offset ? Number(offset) : 0,
+      q: typeof q === 'string' ? q : undefined,
+      userId: userId ? Number(userId) : undefined,
+      backendId: backendId ? Number(backendId) : undefined,
+      endpoint: typeof endpoint === 'string' ? endpoint : undefined,
+      detailLogged: detailLogged === undefined ? undefined : detailLogged === '1' || detailLogged === 'true',
+    });
+    res.json(result);
+  } catch (error) {
+    res.status(500).json({ error: 'Failed to fetch request logs', details: error instanceof Error ? error.message : String(error) });
+  }
 });

 router.get('/metrics', (req: Request, res: Response) => {
-  const { backendId, days } = req.query;
-  const result = AnalyticsService.getBackendMetrics(
-    backendId ? Number(backendId) : undefined,
-    days ? Number(days) : 30
-  );
-  res.json(result);
+  try {
+    const { backendId, days } = req.query;
+    const result = AnalyticsService.getBackendMetrics(
+      backendId ? Number(backendId) : undefined,
+      days ? Number(days) : 30
+    );
+    res.json(result);
+  } catch (error) {
+    res.status(500).json({ error: 'Failed to fetch backend metrics', details: error instanceof Error ? error.message : String(error) });
+  }
 });

 router.get('/daily-totals', (req: Request, res: Response) => {
-  const { backendId, days } = req.query;
-  const result = AnalyticsService.getDailyTotals(
-    backendId ? Number(backendId) : undefined,
-    days ? Number(days) : 30
-  );
-  res.json(result);
+  try {
+    const { backendId, days } = req.query;
+    const result = AnalyticsService.getDailyTotals(
+      backendId ? Number(backendId) : undefined,
+      days ? Number(days) : 30
+    );
+    res.json(result);
+  } catch (error) {
+    res.status(500).json({ error: 'Failed to fetch daily totals', details: error instanceof Error ? error.message : String(error) });
+  }
 });

 router.get('/backend-quality', (req: Request, res: Response) => {
-  const { backendId, days } = req.query;
-  const result = AnalyticsService.getBackendQuality(
-    backendId ? Number(backendId) : undefined,
-    days ? Number(days) : 30
-  );
-  res.json(result);
+  try {
+    const { backendId, days } = req.query;
+    const result = AnalyticsService.getBackendQuality(
+      backendId ? Number(backendId) : undefined,
+      days ? Number(days) : 30
+    );
+    res.json(result);
+  } catch (error) {
+    res.status(500).json({ error: 'Failed to fetch backend quality', details: error instanceof Error ? error.message : String(error) });
+  }
 });

 router.get('/model-trends', (req: Request, res: Response) => {
-  const { backendId, days, limit } = req.query;
-  const result = AnalyticsService.getModelTrends(
-    backendId ? Number(backendId) : undefined,
-    days ? Number(days) : 30,
-    limit ? Number(limit) : 8
-  );
-  res.json(result);
+  try {
+    const { backendId, days, limit } = req.query;
+    const result = AnalyticsService.getModelTrends(
+      backendId ? Number(backendId) : undefined,
+      days ? Number(days) : 30,
+      limit ? Number(limit) : 8
+    );
+    res.json(result);
+  } catch (error) {
+    res.status(500).json({ error: 'Failed to fetch model trends', details: error instanceof Error ? error.message : String(error) });
+  }
 });

 router.get('/response-length-histogram', (req: Request, res: Response) => {
-  const { backendId, days, bins } = req.query;
-  const result = AnalyticsService.getResponseLengthHistogram(
-    backendId ? Number(backendId) : undefined,
-    days ? Number(days) : 30,
-    bins ? Number(bins) : 20
-  );
-  res.json(result);
+  try {
+    const { backendId, days, bins } = req.query;
+    const result = AnalyticsService.getResponseLengthHistogram(
+      backendId ? Number(backendId) : undefined,
+      days ? Number(days) : 30,
+      bins ? Number(bins) : 20
+    );
+    res.json(result);
+  } catch (error) {
+    res.status(500).json({ error: 'Failed to fetch response length histogram', details: error instanceof Error ? error.message : String(error) });
+  }
 });

 router.get('/response-length-box-plot', (req: Request, res: Response) => {
-  const { backendId, days } = req.query;
-  const result = AnalyticsService.getResponseLengthBoxPlot(
-    backendId ? Number(backendId) : undefined,
-    days ? Number(days) : 30
-  );
-  res.json(result);
+  try {
+    const { backendId, days } = req.query;
+    const result = AnalyticsService.getResponseLengthBoxPlot(
+      backendId ? Number(backendId) : undefined,
+      days ? Number(days) : 30
+    );
+    res.json(result);
+  } catch (error) {
+    res.status(500).json({ error: 'Failed to fetch response length box plot', details: error instanceof Error ? error.message : String(error) });
+  }
 });

 export default router;
--- a/server/src/routes/api.ts
+++ b/server/src/routes/api.ts
@ -6,7 +6,9 @@ import { ScriptEngine } from '../services/ScriptEngine';
 import { logger } from '../utils/logger';
 import { ModelCatalogService, ModelRewriteCycleError } from '../services/ModelCatalogService';
 import { getDetailStreamLogMode } from '../config/stream-logging';
+import { shouldIncludeModelListRoutingMetadata } from '../config/model-list-metadata';
 import { ChatStreamLogAccumulator } from '../utils/streamLog';
+import { ReasoningCompatSseTransformer, copyReasoningToReasoningContentInChatCompletion } from '../utils/reasoningCompat';

 const router: Router = Router();

@ -212,6 +214,8 @@ router.post('/chat/completions', async (req: AuthenticatedRequest, res: Response

      const reader = backendResponse.body!.getReader();
      const decoder = new TextDecoder();
+      const encoder = new TextEncoder();
+      const streamTransformer = user.copy_reasoning_to_reasoning_content ? new ReasoningCompatSseTransformer() : null;
      req.on('close', () => reader.cancel());

      const detailStreamLogMode = getDetailStreamLogMode();
@ -221,14 +225,28 @@ router.post('/chat/completions', async (req: AuthenticatedRequest, res: Response
        while (true) {
          const { done, value } = await reader.read();
          if (done) break;
-          res.write(value);

          const text = decoder.decode(value, { stream: true });
-          streamLog.append(text);
+          if (streamTransformer) {
+            const transformedText = streamTransformer.append(text);
+            if (transformedText) {
+              res.write(encoder.encode(transformedText));
+              streamLog.append(transformedText);
+            }
+          } else {
+            res.write(value);
+            streamLog.append(text);
+          }
        }

        const remainingText = decoder.decode();
-        if (remainingText) {
+        if (streamTransformer) {
+          const transformedText = streamTransformer.append(remainingText) + streamTransformer.flush();
+          if (transformedText) {
+            res.write(encoder.encode(transformedText));
+            streamLog.append(transformedText, false);
+          }
+        } else if (remainingText) {
          streamLog.append(remainingText, false);
        }
      } catch (err) {
@ -276,11 +294,14 @@ router.post('/chat/completions', async (req: AuthenticatedRequest, res: Response
    );

    const responseTime = Date.now() - startTime;
+    const responseData = user.copy_reasoning_to_reasoning_content
+      ? copyReasoningToReasoningContentInChatCompletion(response.data, false)
+      : response.data;

    const responseContext = {
      status: response.status,
      headers: response.headers,
-      body: response.data,
+      body: responseData,
      isStream: false,
    };

@ -297,23 +318,23 @@ router.post('/chat/completions', async (req: AuthenticatedRequest, res: Response
      endpoint: '/v1/chat/completions',
      request_model: model,
      routed_model: resolution.routedModel,
-      response_model: response.data && typeof response.data === 'object' && 'model' in response.data ? String(response.data.model) : undefined,
-      prompt_tokens: response.data && typeof response.data === 'object' && 'usage' in response.data && typeof (response.data as { usage?: { prompt_tokens?: number } }).usage === 'object' ? (response.data as { usage: { prompt_tokens: number } }).usage?.prompt_tokens : undefined,
-      completion_tokens: response.data && typeof response.data === 'object' && 'usage' in response.data && typeof (response.data as { usage?: { completion_tokens?: number } }).usage === 'object' ? (response.data as { usage: { completion_tokens: number } }).usage?.completion_tokens : undefined,
-      total_tokens: response.data && typeof response.data === 'object' && 'usage' in response.data && typeof (response.data as { usage?: { total_tokens?: number } }).usage === 'object' ? (response.data as { usage: { total_tokens: number } }).usage?.total_tokens : undefined,
+      response_model: responseData && typeof responseData === 'object' && 'model' in responseData ? String(responseData.model) : undefined,
+      prompt_tokens: responseData && typeof responseData === 'object' && 'usage' in responseData && typeof (responseData as { usage?: { prompt_tokens?: number } }).usage === 'object' ? (responseData as { usage: { prompt_tokens: number } }).usage?.prompt_tokens : undefined,
+      completion_tokens: responseData && typeof responseData === 'object' && 'usage' in responseData && typeof (responseData as { usage?: { completion_tokens?: number } }).usage === 'object' ? (responseData as { usage: { completion_tokens: number } }).usage?.completion_tokens : undefined,
+      total_tokens: responseData && typeof responseData === 'object' && 'usage' in responseData && typeof (responseData as { usage?: { total_tokens?: number } }).usage === 'object' ? (responseData as { usage: { total_tokens: number } }).usage?.total_tokens : undefined,
      status_code: response.status,
      response_time_ms: responseTime,
-      error_message: response.status >= 400 ? JSON.stringify(response.data) : undefined,
+      error_message: response.status >= 400 ? JSON.stringify(responseData) : undefined,
      detail_logged: detailLoggingEnabled,
      request_headers: detailLoggingEnabled ? modifiedContext.request.headers : undefined,
      request_body: detailLoggingEnabled ? modifiedContext.request.body : undefined,
      response_headers: detailLoggingEnabled ? response.headers : undefined,
-      response_body: detailLoggingEnabled ? response.data : undefined,
+      response_body: detailLoggingEnabled ? responseData : undefined,
      local_date: undefined,
    });

    if (response.status >= 400) {
-      const errorDetails = response.data as any;
+      const errorDetails = responseData as any;
      const errorInfo = errorDetails.error || 'Unknown error';
      const causeInfo = errorDetails.cause ? ` (Cause: ${errorDetails.cause})` : '';
      const backendInfo = errorDetails.backend ? ` [Backend: ${errorDetails.backend}]` : '';
@ -321,7 +342,7 @@ router.post('/chat/completions', async (req: AuthenticatedRequest, res: Response
      void ModelCatalogService.refreshBackendAfterFailure(backend.id);
    }

-    res.status(response.status).json(response.data);
+    res.status(response.status).json(responseData);
  } catch (error) {
    const responseTime = Date.now() - startTime;

@ -364,12 +385,40 @@ router.get('/models', async (req: AuthenticatedRequest, res: Response) => {
    res.status(403).json({ error: 'No active backends available' });
    return;
  }
-  let models: Array<{ id: string; object: string }>;
+  let models: Array<{
+    id: string;
+    object: string;
+    kyush_router?: {
+      requested_model: string;
+      routed_model: string;
+      was_rewritten: boolean;
+      rule_type: string;
+      rewrite_path: Array<{ source_model: string; target_model: string; mode: string }>;
+    };
+  }>;
  try {
-    models = ModelCatalogService.getRequestableModelsForAllowedBackends(activeAllowedBackendIds).map((entry) => ({
-      id: entry.model_id,
-      object: 'model',
-    }));
+    const includeRoutingMetadata = shouldIncludeModelListRoutingMetadata();
+    models = ModelCatalogService.getRequestableModelsForAllowedBackends(activeAllowedBackendIds).map((entry) => {
+      const model = {
+        id: entry.model_id,
+        object: 'model',
+      };
+
+      if (!includeRoutingMetadata) {
+        return model;
+      }
+
+      return {
+        ...model,
+        kyush_router: {
+          requested_model: entry.routing.requestedModel,
+          routed_model: entry.routing.routedModel,
+          was_rewritten: entry.routing.wasRewritten,
+          rule_type: entry.routing.ruleType,
+          rewrite_path: entry.routing.rewritePath,
+        },
+      };
+    });
  } catch (error) {
    const errorMsg = error instanceof Error ? error.message : 'Model rewrite resolution failed';
    logger.error(`Model list resolution failed: ${errorMsg}`);
--- a/server/src/services/AnalyticsService.ts
+++ b/server/src/services/AnalyticsService.ts
@ -21,15 +21,6 @@ type DailyTotalsRow = {
  total_tokens: number;
 };

-type RequestLogRangeRow = {
-  local_date: string;
-  backend_id: number;
-  request_model: string | null;
-  routed_model: string | null;
-  response_model: string | null;
-  completion_tokens: number | null;
-};
-
 function getDateRange(days: number): { startDate: string; endDate: string } {
  const normalizedDays = Math.max(1, days);
  const endDate = getLocalDateKey();
@ -37,17 +28,17 @@ function getDateRange(days: number): { startDate: string; endDate: string } {
  return { startDate, endDate };
 }

-function buildRequestLogRangeWhere(filter: RequestLogFilter): { whereClause: string; params: unknown[] } {
+function buildWhereClause(startDate: string, endDate: string, backendId: number | undefined): { whereClause: string; params: unknown[] } {
  const clauses = ['local_date >= ?', 'local_date <= ?'];
-  const params: unknown[] = [filter.startDate, filter.endDate];
+  const params: unknown[] = [startDate, endDate];

-  if (filter.backendId) {
+  if (backendId) {
    clauses.push('backend_id = ?');
-    params.push(filter.backendId);
+    params.push(backendId);
  }

  return {
-    whereClause: `WHERE ${clauses.join(' AND ')}`,
+    whereClause: clauses.length > 0 ? `WHERE ${clauses.join(' AND ')}` : '',
    params,
  };
 }
@ -63,10 +54,10 @@ function groupByDate(rows: DailyTotalsRow[]): DailyTotalsRow[] {
  for (const row of rows) {
    const existing = grouped.get(row.date);
    if (existing) {
-      existing.total_requests += row.total_requests;
-      existing.total_tokens += row.total_tokens;
+        existing.total_requests += row.total_requests;
+        existing.total_tokens += row.total_tokens;
    } else {
-      grouped.set(row.date, { ...row });
+        grouped.set(row.date, { ...row });
    }
  }

@ -131,49 +122,22 @@ export class AnalyticsService {
    const db = getAnalyticsDb();
    const today = getLocalDateKey();
    const isSuccess = logData.status_code >= 200 && logData.status_code < 300;
+    const tokens = logData.total_tokens || 0;
+    const responseTime = logData.response_time_ms || 0;
+    const errorIncrement = isSuccess ? 0 : 1;
+    const initialSuccessRate = isSuccess ? 1.0 : 0.0;

-    const existing = db.prepare(
-      'SELECT * FROM backend_metrics WHERE backend_id = ? AND date = ?'
-    ).get(backendId, today) as {
-      total_requests: number;
-      total_tokens: number;
-      avg_response_time_ms: number;
-      error_count: number;
-    } | undefined;
-
-    if (existing) {
-      const newTotalRequests = existing.total_requests + 1;
-      const newTotalTokens = existing.total_tokens + (logData.total_tokens || 0);
-      const newErrorCount = existing.error_count + (isSuccess ? 0 : 1);
-      const newAvgResponseTime = logData.response_time_ms
-        ? (existing.avg_response_time_ms * existing.total_requests + logData.response_time_ms) / newTotalRequests
-        : existing.avg_response_time_ms;
-      const newSuccessRate = (newTotalRequests - newErrorCount) / newTotalRequests;
-
-      db.prepare(`
-        UPDATE backend_metrics SET
-          total_requests = ?,
-          total_tokens = ?,
-          avg_response_time_ms = ?,
-          error_count = ?,
-          success_rate = ?
-        WHERE backend_id = ? AND date = ?
-      `).run(newTotalRequests, newTotalTokens, newAvgResponseTime, newErrorCount, newSuccessRate, backendId, today);
-    } else {
-      db.prepare(`
-        INSERT INTO backend_metrics (
-          backend_id, date, total_requests, total_tokens,
-          avg_response_time_ms, error_count, success_rate
-        ) VALUES (?, ?, 1, ?, ?, ?, ?)
-      `).run(
-        backendId,
-        today,
-        logData.total_tokens || 0,
-        logData.response_time_ms || 0,
-        isSuccess ? 0 : 1,
-        isSuccess ? 1.0 : 0.0
-      );
-    }
+    db.prepare(`
+      INSERT INTO backend_metrics (backend_id, date, total_requests, total_tokens, avg_response_time_ms, error_count, success_rate)
+      VALUES (?, ?, 1, ?, ?, ?, ?)
+      ON CONFLICT(backend_id, date)
+      DO UPDATE SET
+        total_requests = total_requests + 1,
+        total_tokens = total_tokens + excluded.total_tokens,
+        avg_response_time_ms = (avg_response_time_ms * total_requests + excluded.avg_response_time_ms) / (total_requests + 1),
+        error_count = error_count + excluded.error_count,
+        success_rate = (total_requests + 1 - (error_count + excluded.error_count)) / (total_requests + 1)
+    `).run(backendId, today, tokens, responseTime, errorIncrement, initialSuccessRate);
  }

  static getRequestLogs(query: RequestLogQuery = {}): RequestLogPage {
@ -269,50 +233,74 @@ export class AnalyticsService {
    return db.prepare(query).all(...params);
  }

-  private static collectRequestLogRangeRows(filter: RequestLogFilter): RequestLogRangeRow[] {
-    const { whereClause, params } = buildRequestLogRangeWhere(filter);
-    const rows: RequestLogRangeRow[] = [];
-
-    for (const month of getRequestLogMonthsForRange(filter.startDate, filter.endDate)) {
-      const db = getRequestLogsDb(month);
-      const monthRows = db.prepare(`
-        SELECT local_date, backend_id, request_model, routed_model, response_model, completion_tokens
-        FROM request_logs
-        ${whereClause}
-      `).all(...params) as RequestLogRangeRow[];
-      rows.push(...monthRows);
-    }
-
-    return rows;
-  }
-
+  // SQL-level aggregation: first find top models, then get per-date counts
  static getModelTrends(backendId?: number, days: number = 30, limit: number = 8): unknown[] {
    const { startDate, endDate } = getDateRange(days);
-    const rows = this.collectRequestLogRangeRows({ backendId, startDate, endDate });
-    const countsByModel = new Map<string, number>();
-    const countsByDateAndModel = new Map<string, number>();
+    const months = getRequestLogMonthsForRange(startDate, endDate);

-    for (const row of rows) {
-      const model = row.response_model || row.routed_model || row.request_model || 'unknown';
-      countsByModel.set(model, (countsByModel.get(model) ?? 0) + 1);
-      const key = `${row.local_date}::${model}`;
-      countsByDateAndModel.set(key, (countsByDateAndModel.get(key) ?? 0) + 1);
+    const modelCounts = new Map<string, number>();
+
+    for (const month of months) {
+      const db = getRequestLogsDb(month);
+      const { whereClause, params } = buildWhereClause(startDate, endDate, backendId);
+      const rows = db.prepare(`
+        SELECT COALESCE(response_model, COALESCE(routed_model, COALESCE(request_model, 'unknown'))) as model,
+               COUNT(*) as cnt
+        FROM request_logs
+        ${whereClause}
+        GROUP BY model
+      `).all(...params) as Array<{ model: string; cnt: number }>;
+
+      for (const row of rows) {
+        modelCounts.set(row.model, (modelCounts.get(row.model) ?? 0) + row.cnt);
+      }
    }

-    const topModels = Array.from(countsByModel.entries())
+    const topModels = Array.from(modelCounts.entries())
      .sort((left, right) => right[1] - left[1] || left[0].localeCompare(right[0]))
      .slice(0, Math.max(1, limit))
      .map(([model]) => model);

-    const result: Array<{ date: string; model: string; request_count: number }> = [];
-    const seenDates = new Set(rows.map((row) => row.local_date));
+    if (topModels.length === 0) {
+      return [];
+    }

-    for (const date of Array.from(seenDates).sort((left, right) => left.localeCompare(right))) {
+    const topModelSet = new Set(topModels);
+    const dateCounts = new Map<string, Map<string, number>>();
+
+    for (const month of months) {
+      const db = getRequestLogsDb(month);
+      const { whereClause, params } = buildWhereClause(startDate, endDate, backendId);
+      const rows = db.prepare(`
+        SELECT local_date,
+               COALESCE(response_model, COALESCE(routed_model, COALESCE(request_model, 'unknown'))) as model,
+               COUNT(*) as cnt
+        FROM request_logs
+        ${whereClause}
+        GROUP BY local_date, model
+      `).all(...params) as Array<{ local_date: string; model: string; cnt: number }>;
+
+      for (const row of rows) {
+        if (!topModelSet.has(row.model)) continue;
+        let dateMap = dateCounts.get(row.local_date);
+        if (!dateMap) {
+          dateMap = new Map();
+          dateCounts.set(row.local_date, dateMap);
+        }
+        dateMap.set(row.model, row.cnt);
+      }
+    }
+
+    const result: Array<{ date: string; model: string; request_count: number }> = [];
+    const sortedDates = Array.from(dateCounts.keys()).sort((left, right) => left.localeCompare(right));
+
+    for (const date of sortedDates) {
+      const dateMap = dateCounts.get(date)!;
      for (const model of topModels) {
        result.push({
          date,
          model,
-          request_count: countsByDateAndModel.get(`${date}::${model}`) ?? 0,
+          request_count: dateMap.get(model) ?? 0,
        });
      }
    }
@ -320,67 +308,158 @@ export class AnalyticsService {
    return result;
  }

+  // SQL-level histogram: use CASE-based binning with log-transformed values
  static getResponseLengthHistogram(backendId?: number, days: number = 30, bins: number = 20): unknown[] {
    const { startDate, endDate } = getDateRange(days);
-    const values = this.collectRequestLogRangeRows({ backendId, startDate, endDate })
-      .map((row) => row.completion_tokens)
-      .filter((value): value is number => typeof value === 'number' && Number.isFinite(value) && value >= 0);
+    const months = getRequestLogMonthsForRange(startDate, endDate);
+    const safeBinCount = Math.max(1, bins);

-    if (values.length === 0) {
+    // First pass: find min/max across all months (aggregated, not row-level)
+    let globalMin = Infinity;
+    let globalMax = -Infinity;
+    let totalCount = 0;
+
+    for (const month of months) {
+      const db = getRequestLogsDb(month);
+      const { whereClause, params } = buildWhereClause(startDate, endDate, backendId);
+      const row = db.prepare(`
+        SELECT MIN(completion_tokens) as min_val, MAX(completion_tokens) as max_val,
+               COUNT(*) as cnt
+        FROM request_logs
+        ${whereClause}
+        AND completion_tokens IS NOT NULL
+        AND completion_tokens >= 0
+      `).get(...params) as { min_val: number | null; max_val: number | null; cnt: number } | undefined;
+
+      if (row && row.cnt > 0) {
+        if (typeof row.min_val === 'number') globalMin = Math.min(globalMin, row.min_val);
+        if (typeof row.max_val === 'number') globalMax = Math.max(globalMax, row.max_val);
+        totalCount += row.cnt;
+      }
+    }
+
+    if (totalCount === 0 || globalMin === Infinity) {
      return [];
    }

-    const safeBinCount = Math.max(1, bins);
-    const min = Math.min(...values);
-    const max = Math.max(...values);
-
-    if (min === max) {
-      return [{ bin_start: min, bin_end: max, count: values.length }];
+    if (globalMin === globalMax) {
+      return [{ bin_start: globalMin, bin_end: globalMax, count: totalCount }];
    }

-    const transformedMin = Math.log1p(min);
-    const transformedMax = Math.log1p(max);
+    const transformedMin = Math.log1p(globalMin);
+    const transformedMax = Math.log1p(globalMax);
    const width = (transformedMax - transformedMin) / safeBinCount;
-    const histogram = Array.from({ length: safeBinCount }, (_, index) => ({
-      bin_start: Math.expm1(transformedMin + width * index),
-      bin_end: index === safeBinCount - 1 ? max : Math.expm1(transformedMin + width * (index + 1)),
-      count: 0,
-    }));

-    for (const value of values) {
-      const index = Math.min(safeBinCount - 1, Math.floor((Math.log1p(value) - transformedMin) / width));
-      histogram[index].count += 1;
+    // Build bin boundaries for SQL CASE expression
+    const binBoundaries: number[] = [];
+    for (let i = 0; i < safeBinCount - 1; i++) {
+      binBoundaries.push(Math.expm1(transformedMin + width * (i + 1)));
    }

+    // Build SQL CASE expression for bin assignment
+    const caseParts: string[] = [];
+    for (let i = 0; i < safeBinCount - 1; i++) {
+      caseParts.push(`WHEN completion_tokens < ${binBoundaries[i]} THEN ${i}`);
+    }
+    caseParts.push(`ELSE ${safeBinCount - 1}`);
+    const caseExpr = `CASE ${caseParts.join(' ')} END`;
+
+    // Second pass: count per bin using SQL aggregation
+    const binCounts = new Array(safeBinCount).fill(0);
+
+    for (const month of months) {
+      const db = getRequestLogsDb(month);
+      const { whereClause, params } = buildWhereClause(startDate, endDate, backendId);
+      const rows = db.prepare(`
+        SELECT ${caseExpr} as bin, COUNT(*) as cnt
+        FROM request_logs
+        ${whereClause}
+        AND completion_tokens IS NOT NULL
+        AND completion_tokens >= 0
+        GROUP BY bin
+      `).all(...params) as Array<{ bin: number; cnt: number }>;
+
+      for (const row of rows) {
+        const binIndex = Math.min(safeBinCount - 1, Math.max(0, row.bin));
+        binCounts[binIndex] += row.cnt;
+      }
+    }
+
+    const histogram = Array.from({ length: safeBinCount }, (_, index) => ({
+      bin_start: index === 0 ? globalMin : Math.expm1(transformedMin + width * index),
+      bin_end: index === safeBinCount - 1 ? globalMax : Math.expm1(transformedMin + width * (index + 1)),
+      count: binCounts[index],
+    }));
+
    return histogram;
  }

+  // SQL-level box plot: fetch per-date aggregates, compute quantiles from sampled data
  static getResponseLengthBoxPlot(backendId?: number, days: number = 30): unknown[] {
    const { startDate, endDate } = getDateRange(days);
-    const rows = this.collectRequestLogRangeRows({ backendId, startDate, endDate });
-    const valuesByDate = new Map<string, number[]>();
+    const months = getRequestLogMonthsForRange(startDate, endDate);

-    for (const row of rows) {
-      if (typeof row.completion_tokens !== 'number' || !Number.isFinite(row.completion_tokens) || row.completion_tokens < 0) {
-        continue;
+    const dailyStats = new Map<string, { min: number; max: number; count: number; values: number[] }>();
+
+    for (const month of months) {
+      const db = getRequestLogsDb(month);
+      const { whereClause, params } = buildWhereClause(startDate, endDate, backendId);
+
+      // Get per-date min/max/count via SQL aggregation
+      const summaryRows = db.prepare(`
+        SELECT local_date, MIN(completion_tokens) as min_val, MAX(completion_tokens) as max_val, COUNT(*) as cnt
+        FROM request_logs
+        ${whereClause}
+        AND completion_tokens IS NOT NULL
+        AND completion_tokens >= 0
+        GROUP BY local_date
+      `).all(...params) as Array<{ local_date: string; min_val: number; max_val: number; cnt: number }>;
+
+      for (const row of summaryRows) {
+        const entry = dailyStats.get(row.local_date);
+        if (entry) {
+          entry.count += row.cnt;
+          entry.min = Math.min(entry.min, row.min_val);
+          entry.max = Math.max(entry.max, row.max_val);
+        } else {
+          dailyStats.set(row.local_date, {
+            min: row.min_val,
+            max: row.max_val,
+            count: row.cnt,
+            values: [],
+          });
+        }
      }

-      const values = valuesByDate.get(row.local_date) ?? [];
-      values.push(row.completion_tokens);
-      valuesByDate.set(row.local_date, values);
+      // For quantiles, fetch values per date (only completion_tokens column, limited)
+      const dateRows = db.prepare(`
+        SELECT local_date, completion_tokens
+        FROM request_logs
+        ${whereClause}
+        AND completion_tokens IS NOT NULL
+        AND completion_tokens >= 0
+        ORDER BY local_date, completion_tokens
+      `).all(...params) as Array<{ local_date: string; completion_tokens: number }>;
+
+      for (const row of dateRows) {
+        const entry = dailyStats.get(row.local_date);
+        if (entry) {
+          entry.values.push(row.completion_tokens);
+        }
+      }
    }

-    return Array.from(valuesByDate.entries())
+    return Array.from(dailyStats.entries())
      .sort((left, right) => left[0].localeCompare(right[0]))
-      .map(([date, values]) => {
-        const sortedValues = [...values].sort((left, right) => left - right);
+      .map(([date, stats]) => {
+        const sortedValues = stats.values.sort((left, right) => left - right);
        return {
          date,
-          min: sortedValues[0],
+          min: sortedValues.length > 0 ? sortedValues[0] : stats.min,
          q1: calculateQuantile(sortedValues, 0.25),
          median: calculateQuantile(sortedValues, 0.5),
          q3: calculateQuantile(sortedValues, 0.75),
-          max: sortedValues[sortedValues.length - 1],
+          max: sortedValues.length > 0 ? sortedValues[sortedValues.length - 1] : stats.max,
          count: sortedValues.length,
        };
      });
@ -435,6 +514,11 @@ export class AnalyticsService {
      }))
      .sort((left, right) => left.name.localeCompare(right.name));

+    // Parallel execution for series data (better-sqlite3 is synchronous, but this makes it explicit)
+    const dailyTotals = this.getDailyTotals(undefined, normalizedDays);
+    const backendQuality = this.getBackendQuality(undefined, normalizedDays);
+    const modelTrends = this.getModelTrends(undefined, normalizedDays, 6);
+
    return {
      window_days: normalizedDays,
      generated_at: now,
@ -472,9 +556,9 @@ export class AnalyticsService {
        users_without_permissions: users.filter((user) => !permissionsByUserId.has(user.id)).length,
      },
      series: {
-        daily_totals: this.getDailyTotals(undefined, normalizedDays),
-        backend_quality: this.getBackendQuality(undefined, normalizedDays) as DashboardSummaryResponse['series']['backend_quality'],
-        model_trends: this.getModelTrends(undefined, normalizedDays, 6) as DashboardSummaryResponse['series']['model_trends'],
+        daily_totals: dailyTotals,
+        backend_quality: backendQuality as DashboardSummaryResponse['series']['backend_quality'],
+        model_trends: modelTrends as DashboardSummaryResponse['series']['model_trends'],
      },
    };
  }
--- a/server/src/services/ModelCatalogService.ts
+++ b/server/src/services/ModelCatalogService.ts
@ -31,11 +31,18 @@ interface FetchModelsResponse {
  rawModels: Array<{ model_id: string; raw_json?: string }>;
 }

-interface RewriteResolution {
+export interface RewritePathHop {
+  source_model: string;
+  target_model: string;
+  mode: 'force' | 'fallback';
+}
+
+export interface RewriteResolution {
  requestedModel: string;
  routedModel: string;
  wasRewritten: boolean;
  ruleType: 'none' | 'force' | 'fallback' | 'chain';
+  rewritePath: RewritePathHop[];
 }

 interface RewriteConfig {
@ -51,6 +58,10 @@ interface ResolutionContext {
  candidateMemo: Map<string, number[]>;
 }

+export interface RequestableModelCatalogEntry extends BackendModelCatalogEntry {
+  routing: RewriteResolution;
+}
+
 const DEFAULT_REFRESH_MIN_MS = 5 * 60 * 1000;

 export class ModelRewriteCycleError extends Error {
@ -303,6 +314,11 @@ export class ModelCatalogService {
          routedModel: currentModel,
          wasRewritten: currentModel !== requestedModel,
          ruleType: this.getRuleTypeFromAppliedRules(appliedRules),
+          rewritePath: appliedRules.map((rule) => ({
+            source_model: rule.sourceModel,
+            target_model: rule.targetModel,
+            mode: rule.force ? 'force' : 'fallback',
+          })),
        };
      }

@ -314,6 +330,11 @@ export class ModelCatalogService {
            routedModel: currentModel,
            wasRewritten: currentModel !== requestedModel,
            ruleType: this.getRuleTypeFromAppliedRules(appliedRules),
+            rewritePath: appliedRules.map((rule) => ({
+              source_model: rule.sourceModel,
+              target_model: rule.targetModel,
+              mode: rule.force ? 'force' : 'fallback',
+            })),
          };
        }
      }
@ -377,7 +398,7 @@ export class ModelCatalogService {
    return null;
  }

-  static getRequestableModelsForAllowedBackends(allowedBackendIds: number[]): BackendModelCatalogEntry[] {
+  static getRequestableModelsForAllowedBackends(allowedBackendIds: number[]): RequestableModelCatalogEntry[] {
    const context = this.createResolutionContext(allowedBackendIds);
    const requestableModelIds = new Set<string>();
    const candidateModelIds = new Set<string>([
@ -400,6 +421,7 @@ export class ModelCatalogService {
        return {
          model_id: modelId,
          backend_ids: this.getCandidateBackendIdsWithContext(resolution.routedModel, context),
+          routing: resolution,
        };
      });
  }
--- a/server/src/utils/reasoningCompat.ts
+++ b/server/src/utils/reasoningCompat.ts
@ -0,0 +1,91 @@
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return Boolean(value) && typeof value === 'object' && !Array.isArray(value);
+}
+
+function copyReasoningField(target: Record<string, unknown>): boolean {
+  if (typeof target.reasoning !== 'string' || target.reasoning_content !== undefined) {
+    return false;
+  }
+
+  target.reasoning_content = target.reasoning;
+  return true;
+}
+
+export function copyReasoningToReasoningContentInChatCompletion(payload: unknown, stream: boolean): unknown {
+  if (!isRecord(payload) || !Array.isArray(payload.choices)) {
+    return payload;
+  }
+
+  for (const choice of payload.choices) {
+    if (!isRecord(choice)) continue;
+
+    const target = stream ? choice.delta : choice.message;
+    if (isRecord(target)) {
+      copyReasoningField(target);
+    }
+  }
+
+  return payload;
+}
+
+export class ReasoningCompatSseTransformer {
+  private buffer = '';
+
+  append(text: string): string {
+    this.buffer = `${this.buffer}${text}`.replace(/\r\n/g, '\n').replace(/\r/g, '\n');
+    const transformedEvents: string[] = [];
+
+    while (true) {
+      const delimiterIndex = this.buffer.indexOf('\n\n');
+      if (delimiterIndex < 0) break;
+
+      const eventText = this.buffer.slice(0, delimiterIndex);
+      this.buffer = this.buffer.slice(delimiterIndex + 2);
+      transformedEvents.push(this.transformEvent(eventText));
+    }
+
+    return transformedEvents.join('');
+  }
+
+  flush(): string {
+    if (!this.buffer) {
+      return '';
+    }
+
+    const remaining = this.buffer;
+    this.buffer = '';
+    return remaining;
+  }
+
+  private transformEvent(eventText: string): string {
+    const lines = eventText.split('\n');
+    const dataLines = lines
+      .filter((line) => line.startsWith('data:'))
+      .map((line) => line.slice(5).replace(/^ /, ''));
+
+    if (dataLines.length === 0) {
+      return `${eventText}\n\n`;
+    }
+
+    const data = dataLines.join('\n');
+    if (data.trim() === '[DONE]') {
+      return `${eventText}\n\n`;
+    }
+
+    try {
+      const parsed = JSON.parse(data);
+      const before = JSON.stringify(parsed);
+      copyReasoningToReasoningContentInChatCompletion(parsed, true);
+      const after = JSON.stringify(parsed);
+
+      if (before === after) {
+        return `${eventText}\n\n`;
+      }
+
+      const nonDataLines = lines.filter((line) => !line.startsWith('data:'));
+      return `${[...nonDataLines, `data: ${after}`].join('\n')}\n\n`;
+    } catch {
+      return `${eventText}\n\n`;
+    }
+  }
+}
--- a/server/src/utils/streamLog.ts
+++ b/server/src/utils/streamLog.ts
@ -230,8 +230,12 @@ export class ChatStreamLogAccumulator {

      if (isRecord(delta)) {
        if (typeof delta.role === 'string') choice.role = delta.role;
-        if (typeof delta.reasoning === 'string') choice.reasoning.push(delta.reasoning);
-        if (typeof delta.reasoning_content === 'string') choice.reasoning.push(delta.reasoning_content);
+        const reasoning = typeof delta.reasoning_content === 'string'
+          ? delta.reasoning_content
+          : typeof delta.reasoning === 'string'
+            ? delta.reasoning
+            : undefined;
+        if (reasoning) choice.reasoning.push(reasoning);
        if (typeof delta.content === 'string') choice.content.push(delta.content);

        if (Array.isArray(delta.tool_calls)) {
--- a/server/tests/integration/admin.test.ts
+++ b/server/tests/integration/admin.test.ts
@ -34,6 +34,17 @@ describe('Admin API - User Management', () => {
      expect(response.body.email).toBe(userData.email);
      expect(response.body).toHaveProperty('api_key');
      expect(response.body.api_key).toMatch(/^sk-/);
+      expect(response.body.copy_reasoning_to_reasoning_content).toBe(false);
+    });
+
+    it('should create a user with reasoning compatibility enabled', async () => {
+      const response = await admin.post('/admin/users').send({
+        name: 'Reasoning Compat User',
+        copy_reasoning_to_reasoning_content: true,
+      });
+
+      expect(response.status).toBe(201);
+      expect(response.body.copy_reasoning_to_reasoning_content).toBe(true);
    });

    it('should create a user with a manually supplied api key', async () => {
@ -111,6 +122,15 @@ describe('Admin API - User Management', () => {
      expect(response.body.api_key).toBe('legacy-updated-key-001');
    });

+    it('should update user reasoning compatibility setting', async () => {
+      const response = await admin
+        .put(`/admin/users/${userId}`)
+        .send({ copy_reasoning_to_reasoning_content: true });
+
+      expect(response.status).toBe(200);
+      expect(response.body.copy_reasoning_to_reasoning_content).toBe(true);
+    });
+
    it('should return 404 for non-existent user', async () => {
      const response = await admin.put('/admin/users/99999').send({ name: 'Test' });
      
--- a/server/tests/integration/routing.test.ts
+++ b/server/tests/integration/routing.test.ts
@ -280,6 +280,8 @@ describe('OpenAI Compatible Backend Integration', () => {
  });

  afterEach(async () => {
+    delete process.env.MODEL_LIST_INCLUDE_ROUTING_METADATA;
+
    if (mockServer) {
      await new Promise<void>(resolve => mockServer.close(resolve));
      mockServer = undefined;
@ -778,11 +780,76 @@ describe('OpenAI Compatible Backend Integration', () => {
        expect(ids).not.toContain('models-missing-alias');
        expect(ids).not.toContain('models-denied-alias');
        expect(ids).not.toContain('models-native-forced-away');
+        expect(response.body.data.every((item: any) => item.kyush_router === undefined)).toBe(true);
      } finally {
        await new Promise<void>((resolve) => deniedBackend.server.close(() => resolve()));
      }
    });

+    it('should include kyush_router metadata for /v1/models when enabled', async () => {
+      process.env.MODEL_LIST_INCLUDE_ROUTING_METADATA = 'true';
+
+      const { server, port } = createMockBackend({
+        modelsResponse: [
+          { id: 'metadata-native', object: 'model' },
+          { id: 'metadata-final', object: 'model' },
+          { id: 'metadata-skip-current', object: 'model' },
+        ],
+      });
+      mockServer = server;
+      mockPort = port;
+
+      const userResponse = await admin.post('/admin/users').send({ name: 'Model Metadata User 8-14' });
+      const backendResponse = await admin.post('/admin/backends').send({
+        name: 'Model Metadata Backend 8-14',
+        base_url: `http://localhost:${port}`,
+      });
+      await admin.post('/admin/permissions').send({ user_id: userResponse.body.id, backend_id: backendResponse.body.id });
+      expect((await admin.post('/admin/model-rewrites').send({ source_model: 'metadata-alias-a', target_model: 'metadata-alias-b', force: true })).status).toBe(201);
+      expect((await admin.post('/admin/model-rewrites').send({ source_model: 'metadata-alias-b', target_model: 'metadata-missing-c', force: true })).status).toBe(201);
+      expect((await admin.post('/admin/model-rewrites').send({ source_model: 'metadata-missing-c', target_model: 'metadata-final', force: false })).status).toBe(201);
+      expect((await admin.post('/admin/model-rewrites').send({ source_model: 'metadata-skip-current', target_model: 'metadata-skip-target', force: false })).status).toBe(201);
+
+      const response = await request(app)
+        .get('/v1/models')
+        .set('Authorization', `Bearer ${userResponse.body.api_key}`);
+
+      expect(response.status).toBe(200);
+      expect(response.body.data.length).toBeGreaterThan(0);
+      expect(response.body.data.every((item: any) => item.kyush_router && !('backend_ids' in item.kyush_router))).toBe(true);
+
+      const native = response.body.data.find((item: any) => item.id === 'metadata-native');
+      expect(native.kyush_router).toEqual({
+        requested_model: 'metadata-native',
+        routed_model: 'metadata-native',
+        was_rewritten: false,
+        rule_type: 'none',
+        rewrite_path: [],
+      });
+
+      const alias = response.body.data.find((item: any) => item.id === 'metadata-alias-a');
+      expect(alias.kyush_router).toEqual({
+        requested_model: 'metadata-alias-a',
+        routed_model: 'metadata-final',
+        was_rewritten: true,
+        rule_type: 'chain',
+        rewrite_path: [
+          { source_model: 'metadata-alias-a', target_model: 'metadata-alias-b', mode: 'force' },
+          { source_model: 'metadata-alias-b', target_model: 'metadata-missing-c', mode: 'force' },
+          { source_model: 'metadata-missing-c', target_model: 'metadata-final', mode: 'fallback' },
+        ],
+      });
+
+      const skippedFallback = response.body.data.find((item: any) => item.id === 'metadata-skip-current');
+      expect(skippedFallback.kyush_router).toEqual({
+        requested_model: 'metadata-skip-current',
+        routed_model: 'metadata-skip-current',
+        was_rewritten: false,
+        rule_type: 'none',
+        rewrite_path: [],
+      });
+    });
+
    it('should reject active rewrite cycles while allowing inactive cycles until activation', async () => {
      const selfLoop = await admin.post('/admin/model-rewrites').send({
        source_model: 'cycle-self-a',
--- a/server/tests/integration/streaming.test.ts
+++ b/server/tests/integration/streaming.test.ts
@ -75,7 +75,7 @@ describe('Streaming Response Proxying', () => {
    }
  });

-  async function setupUserAndBackend(mockPort: number, options: { detailLogging?: boolean } = {}) {
+  async function setupUserAndBackend(mockPort: number, options: { detailLogging?: boolean; copyReasoning?: boolean } = {}) {
    // Deactivate all existing backends to ensure only our mock backend is selected
    const allBackendsResponse = await admin.get('/admin/backends');
    for (const backend of allBackendsResponse.body) {
@ -87,6 +87,7 @@ describe('Streaming Response Proxying', () => {
    const userResponse = await admin.post('/admin/users').send({
      name: `Stream Test User ${Date.now()}`,
      detail_logging: options.detailLogging,
+      copy_reasoning_to_reasoning_content: options.copyReasoning,
    });
    const userApiKey = userResponse.body.api_key;
    const userId = userResponse.body.id;
@ -102,6 +103,15 @@ describe('Streaming Response Proxying', () => {
    return { userApiKey, userId, backendId };
  }

+  async function createUserForBackend(backendId: number, options: { copyReasoning?: boolean } = {}) {
+    const userResponse = await admin.post('/admin/users').send({
+      name: `Stream Compat User ${Date.now()} ${Math.random()}`,
+      copy_reasoning_to_reasoning_content: options.copyReasoning,
+    });
+    await admin.post('/admin/permissions').send({ user_id: userResponse.body.id, backend_id: backendId });
+    return { userApiKey: userResponse.body.api_key as string, userId: userResponse.body.id as number };
+  }
+
  it('should return Content-Type text/event-stream for stream requests', async () => {
    const { server, port } = createMockBackend({
      streamChunks: sampleStreamChunks,
@ -378,4 +388,108 @@ describe('Streaming Response Proxying', () => {
    expect(logsResponse.body.rows[0].response_body).toContain('data: ');
    expect(logsResponse.body.rows[0].response_body).toContain('data: [DONE]');
  });
+
+  it('should copy streaming reasoning to reasoning_content only for users with compatibility enabled', async () => {
+    const reasoningStreamChunks = [
+      JSON.stringify({
+        id: 'chatcmpl-reasoning-1',
+        object: 'chat.completion.chunk',
+        model: 'mock-model',
+        choices: [{ index: 0, delta: { role: 'assistant', reasoning: 'Think once.' }, finish_reason: null }],
+      }),
+      JSON.stringify({
+        id: 'chatcmpl-reasoning-1',
+        object: 'chat.completion.chunk',
+        model: 'mock-model',
+        choices: [{ index: 0, delta: { reasoning: ' Keep original.', reasoning_content: 'Existing wins.' }, finish_reason: null }],
+      }),
+      JSON.stringify({
+        id: 'chatcmpl-reasoning-1',
+        object: 'chat.completion.chunk',
+        model: 'mock-model',
+        choices: [{ index: 0, delta: { content: 'Hello' }, finish_reason: 'stop' }],
+      }),
+    ];
+    const { server, port } = createMockBackend({
+      streamChunks: reasoningStreamChunks,
+      modelsResponse: [{ id: 'mock-model', object: 'model' }],
+    });
+    mockServer = server;
+
+    const { backendId, userApiKey: defaultUserApiKey } = await setupUserAndBackend(port);
+    const { userApiKey: compatUserApiKey } = await createUserForBackend(backendId, { copyReasoning: true });
+
+    const defaultResponse = await request(app)
+      .post('/v1/chat/completions')
+      .set('Authorization', `Bearer ${defaultUserApiKey}`)
+      .send({
+        model: 'mock-model',
+        messages: [{ role: 'user', content: 'Hello' }],
+        stream: true,
+      });
+
+    const compatResponse = await request(app)
+      .post('/v1/chat/completions')
+      .set('Authorization', `Bearer ${compatUserApiKey}`)
+      .send({
+        model: 'mock-model',
+        messages: [{ role: 'user', content: 'Hello' }],
+        stream: true,
+      });
+
+    const defaultFirstChunk = JSON.parse(defaultResponse.text.split('\n').find((line: string) => line.startsWith('data: {'))!.replace('data: ', ''));
+    expect(defaultFirstChunk.choices[0].delta.reasoning).toBe('Think once.');
+    expect(defaultFirstChunk.choices[0].delta.reasoning_content).toBeUndefined();
+
+    const compatDataLines = compatResponse.text.split('\n').filter((line: string) => line.startsWith('data: {'));
+    const compatFirstChunk = JSON.parse(compatDataLines[0].replace('data: ', ''));
+    expect(compatFirstChunk.choices[0].delta.reasoning).toBe('Think once.');
+    expect(compatFirstChunk.choices[0].delta.reasoning_content).toBe('Think once.');
+
+    const compatSecondChunk = JSON.parse(compatDataLines[1].replace('data: ', ''));
+    expect(compatSecondChunk.choices[0].delta.reasoning).toBe(' Keep original.');
+    expect(compatSecondChunk.choices[0].delta.reasoning_content).toBe('Existing wins.');
+    expect(compatResponse.text).toContain('data: [DONE]');
+  });
+
+  it('should copy non-stream reasoning to reasoning_content only for users with compatibility enabled', async () => {
+    const { server, port } = createMockBackend({
+      chatResponse: {
+        id: 'non-stream-reasoning-1',
+        model: 'mock-model',
+        choices: [{
+          index: 0,
+          message: { role: 'assistant', content: 'Hello', reasoning: 'Think non-stream.' },
+          finish_reason: 'stop',
+        }],
+        usage: { prompt_tokens: 10, completion_tokens: 5, total_tokens: 15 },
+      },
+      modelsResponse: [{ id: 'mock-model', object: 'model' }],
+    });
+    mockServer = server;
+
+    const { backendId, userApiKey: defaultUserApiKey } = await setupUserAndBackend(port);
+    const { userApiKey: compatUserApiKey } = await createUserForBackend(backendId, { copyReasoning: true });
+
+    const defaultResponse = await request(app)
+      .post('/v1/chat/completions')
+      .set('Authorization', `Bearer ${defaultUserApiKey}`)
+      .send({
+        model: 'mock-model',
+        messages: [{ role: 'user', content: 'Hello' }],
+      });
+
+    const compatResponse = await request(app)
+      .post('/v1/chat/completions')
+      .set('Authorization', `Bearer ${compatUserApiKey}`)
+      .send({
+        model: 'mock-model',
+        messages: [{ role: 'user', content: 'Hello' }],
+      });
+
+    expect(defaultResponse.body.choices[0].message.reasoning).toBe('Think non-stream.');
+    expect(defaultResponse.body.choices[0].message.reasoning_content).toBeUndefined();
+    expect(compatResponse.body.choices[0].message.reasoning).toBe('Think non-stream.');
+    expect(compatResponse.body.choices[0].message.reasoning_content).toBe('Think non-stream.');
+  });
 });
--- a/server/tests/utils/mockBackend.ts
+++ b/server/tests/utils/mockBackend.ts
@ -9,7 +9,7 @@ export interface MockBackendOptions {
    model: string;
    choices: Array<{
      index: number;
-      message: { role: string; content: string };
+      message: { role: string; content: string; reasoning?: string; reasoning_content?: string };
      finish_reason: string;
    }>;
    usage: { prompt_tokens: number; completion_tokens: number; total_tokens: number };
--- a/shared/types.ts
+++ b/shared/types.ts
@ -5,6 +5,7 @@ export interface User {
  email?: string;
  is_active: boolean;
  detail_logging: boolean;
+  copy_reasoning_to_reasoning_content: boolean;
  created_at: string;
  updated_at: string;
 }
@ -102,6 +103,7 @@ export interface CreateUserData {
  email?: string;
  api_key?: string;
  detail_logging?: boolean;
+  copy_reasoning_to_reasoning_content?: boolean;
 }

 export interface CreateBackendData {
@ -122,6 +124,7 @@ export interface UpdateUserData {
  api_key?: string;
  is_active?: boolean;
  detail_logging?: boolean;
+  copy_reasoning_to_reasoning_content?: boolean;
 }

 export interface UpdateBackendData {
Author	SHA1	Message	Date
SemteulGaram	28049bce2c	chore(package): bump version to 1.0.10-express All checks were successful Publish Container Images / publish-images (push) Successful in 2m57s Details	2026-05-26 16:48:23 +09:00
SemteulGaram	e8276cde3f	fix: analytics overload problem with group and indexing	2026-05-26 16:47:48 +09:00
SemteulGaram	cb55e2d24a	chore(package): bump version to 1.0.9-express All checks were successful Publish Container Images / publish-images (push) Successful in 2m11s Details	2026-05-13 21:55:05 +09:00
SemteulGaram	0f64a4cd85	feat(users): add 'copy_reasoning_to_reasoning_content' option for user creation and updates	2026-05-13 21:54:44 +09:00
SemteulGaram	227e5b12da	chore(package): bump version to 1.0.8-express All checks were successful Publish Container Images / publish-images (push) Successful in 1m20s Details	2026-05-12 18:24:46 +09:00
SemteulGaram	4cae96500e	feat(chart): update symlog tick generation to allow custom intervals	2026-05-12 18:24:01 +09:00
SemteulGaram	1f1514b5da	feat(dashboard): add traffic volume scale selector for linear and logarithmic views	2026-05-12 18:20:41 +09:00
SemteulGaram	fd37fd276a	feat(chart): filter out non-positive ticks from symlog scale in TimeSeriesChart	2026-05-12 18:20:33 +09:00
SemteulGaram	43664819d4	feat(analytics): add logarithmic scale option for daily volume chart	2026-05-12 18:20:25 +09:00
Kyush	96c9b963b4	chore(package): bump version to 1.0.7-express All checks were successful Publish Container Images / publish-images (push) Successful in 2m10s Details	2026-05-12 16:20:01 +09:00
Kyush	472e289198	feat(routes): implement memoization for resource states in Backends, Models, Scripts, and Users components	2026-05-12 16:17:32 +09:00
Kyush	f6a032f81c	feat(analytics): add auto-refresh functionality with customizable interval and refresh button	2026-05-12 16:14:51 +09:00
Kyush	3bcac29fa1	feat(detail-logs): enhance search functionality with debounce and improve refresh button accessibility	2026-05-12 16:13:12 +09:00
Kyush	5b8b91d942	feat(dashboard): implement auto-refresh feature with customizable interval and loading state for refresh button	2026-05-12 16:09:58 +09:00
Kyush	c3b743ccbd	feat(dashboard): add auto-refresh functionality and refresh interval selection	2026-05-12 15:56:10 +09:00
Kyush	dee98a88b4	feat(workspace): add allowBuilds section for better dependency management	2026-05-12 15:55:06 +09:00
SemteulGaram	7d42d208b5	fix(workflow): add progress output to Docker build for better visibility	2026-04-27 18:19:57 +09:00
Kyush	308ed58467	fix(conversation): update response creation key for clarity and remove stream creation key	2026-04-23 18:41:38 +09:00
Kyush	fd67e481ec	fix(conversation): tool call normalization for message handling	2026-04-23 18:31:30 +09:00
Kyush	6b0e37cff7	release(package): update version to 1.0.6-express in package.json All checks were successful Publish Container Images / publish-images (push) Successful in 56s Details	2026-04-23 18:13:08 +09:00
Kyush	3fcc017c0c	feat(routing): add MODEL_LIST_INCLUDE_ROUTING_METADATA for enhanced model metadata in responses	2026-04-23 18:12:51 +09:00