feat(ui): single-view layout with MCP URL in header + full-bleed service map

[aksOps]

Summary

UX cleanup of the embedded React UI based on user feedback during a live session on a 34" desktop:

• Removed Traces and Logs views from the nav. Service Map is the only remaining view, so nav tabs are dropped entirely.
• MCP endpoint URL now lives in the TopNav header with an inline Copy button — visible from any state, no navigation needed. Standalone MCPConsole view is unmounted (file kept as orphaned source for a follow-up cleanup pass).
• Service Map canvas height now scales with viewport via a new `useWindowHeight` hook. Was hard-capped at 660px; now floor=460, cap=`windowH - 320`, so a 1440-tall window gets ~1120px of canvas.
• Fixed: even a 34" monitor was rendering everything at "mobile size". Root cause: the design-system `` component defaults to `display: inline-flex`, which collapses the container to its widest child's intrinsic width. Top-level `` in remaining views now overrides this with `{ display: 'flex', width: '100%' }` so the page fills wide monitors.

Bundle

`248KB → 233KB` after tree-shaking the orphaned Traces/Logs view + MCPConsole code from the production bundle.

Files

• `ui/src/App.tsx` — strip traces/logs imports, hooks, callbacks, state
• `ui/src/components/nav/TopNav.tsx` — single-view nav, MCP URL+Copy in header
• `ui/src/components/observability/ServicesView.tsx` — width-fill, dynamic map height
• `ui/src/components/observability/ServiceSidePanel.tsx` — drop `onViewTraces`/`onViewLogs` props + buttons (no destination anymore)
• `ui/src/components/observability/tests/ServiceSidePanel.test.tsx` — drop the orphaned "View Traces" test
• `ui/src/hooks/useWindowHeight.ts` — new SSR-safe resize-tracking hook
• `ui/src/components/mcp/MCPConsole.tsx` — annotated as orphaned, contains the same URL+Copy pattern but is no longer routed
• `internal/ui/dist/*` — fresh production bundle (Vite output, tracked per project convention)

Orphaned source kept for follow-up

`TracesView.tsx`, `LogsView.tsx`, `useTraces.ts`, `useLogs.ts`, `MCPConsole.tsx` (and related tests). Tree-shaken from the bundle so they don't ship; left in source to keep this PR scoped to the UX change. A small follow-up will delete them.

Test plan

• `make ui-build` clean
• `go build ./...` clean
• Daemon starts on `HTTP_PORT=37776` and serves `index-B9ZFj2IV.js`
• Visual: 34" monitor shows full-width layout (verified by user during session)
• Visual: service map fills available height (verified by user during session)
• CI green
• SonarCloud Quality Gate green

🤖 Generated with Claude Code

[sonarqubecloud]

Quality Gate passed

Issues
6 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud