feat(webui): Wave 6A — usage badge and failover timeline

.github/workflows/deploy-pages.yml

@@ -127,7 +127,7 @@ jobs:
         run: |
           cd webui && npm ci && npm run build
           cd ..
-          npx playwright test tests/e2e/pages-chat.spec.ts tests/e2e/failover-dual-endpoint.spec.ts tests/e2e/model-picker.spec.ts tests/e2e/message-actions.spec.ts tests/e2e/health-panel.spec.ts tests/e2e/turnstile-gate.spec.ts tests/e2e/catalog-explorer.spec.ts tests/e2e/export-session.spec.ts tests/e2e/hash-routing.spec.ts tests/e2e/import-session.spec.ts tests/e2e/shortcuts-sheet.spec.ts tests/e2e/streaming-polish.spec.ts tests/e2e/compare-mode.spec.ts tests/e2e/vision-attach.spec.ts tests/e2e/tier-settings.spec.ts
+          npx playwright test tests/e2e/pages-chat.spec.ts tests/e2e/failover-dual-endpoint.spec.ts tests/e2e/model-picker.spec.ts tests/e2e/message-actions.spec.ts tests/e2e/health-panel.spec.ts tests/e2e/turnstile-gate.spec.ts tests/e2e/catalog-explorer.spec.ts tests/e2e/export-session.spec.ts tests/e2e/hash-routing.spec.ts tests/e2e/import-session.spec.ts tests/e2e/shortcuts-sheet.spec.ts tests/e2e/streaming-polish.spec.ts tests/e2e/compare-mode.spec.ts tests/e2e/vision-attach.spec.ts tests/e2e/tier-settings.spec.ts tests/e2e/failover-timeline.spec.ts
 
       - name: Run live Pages chat e2e (real proxy)
         env:

CONCEPTS.md

@@ -45,6 +45,11 @@ Shared vocabulary for the static chat gateway and Python library.
 | **Compare mode** | Two-column chat UI: same prompt to two independently configured sources |
 | **Web UI provider tier** | Optional headless-browser route against free web chat UIs; requires user-run runner; off by default on public demo |
 | **SearXNG discovery tier** | Metasearch pass to suggest candidate free web chat URLs when API/web tiers exhaust |
+| **Thinking block** | Collapsible reasoning trace in assistant messages when the active route streams a reasoning channel |
+| **Tool-call card** | Structured in-message UI for streamed tool invocations with lifecycle status (display-only until a later wave adds execution) |
+| **Usage badge** | Per-reply UI showing token counts (when exposed by route) plus TTFT and total latency |
+| **Failover timeline** | Expanded routing view: ordered hop attempts with endpoint, model, outcome, and tier skip reasons |
+| **Voice input** | Web Speech dictation into the composer on supported browsers; user sends manually |
 
 ## Learnings index