feat(webapp): sessions view for compiled conversation history

[plind-junior]

what

adds a /sessions view to the vendored webapp console: a card grid of the enrich pipeline's compiled type=session pages — the compiled-conversation-history surface the console was missing.

each card shows the session title, created date, enrich summary, and the compiled subject chips; cards sort newest first, filter client-side by title/summary/subject, and click through to the existing /browse/page/<id> drawer deep-link. the view fans out over all scoped projects like the other list views, tags rows with the project label when aggregated, and renders the standard unavailable/empty/error states when kb.list_pages is missing or empty.

why

capture + enrich already compile every conversation into a session page with a summary and typed subjects, but nothing in the console displayed them — the compiled history was only reachable by reading .vouch/pages/ by hand. this is the card-view half of making compiled sessions browsable; a cross-session subjects index can follow separately.

how it was tested

• new SessionsView.test.tsx written first (7 tests: ordering, {type: "session"} request param, subject chips, filtering, drawer deep-link, empty state, unavailable state)
• Shell.test.tsx extended for the new nav link
• full webapp suite green: 29 files, 165 tests
• tsc --noEmit clean

no server changes — kb.list_pages already accepted the type filter.

Summary by CodeRabbit

• New Features

  • Added a Sessions view displaying compiled conversation history in newest-first order.
  • Added session cards with titles, dates, summaries, subject labels, filtering, and links to detailed views.
  • Added Sessions navigation to the sidebar.
  • Added clear empty-state and endpoint availability messages.

• Bug Fixes

  • Improved handling of session loading errors with visible error messaging.

[github-actions]

this PR changes UI (web/, src/vouch/web/, or webapp/) but has no before/after screenshots in the description. UI changes are reviewed by screenshot, not by running the app. add before and after screenshots, then reopen.

[coderabbitai]

Caution

Review failed

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: b40bd83f-9919-47bf-9c0e-bbeb8beeb6f0

📥 Commits

Reviewing files that changed from the base of the PR and between b806941 and b436ee3.

📒 Files selected for processing (5)

• webapp/src/App.tsx
• webapp/src/components/Shell.test.tsx
• webapp/src/components/Shell.tsx
• webapp/src/views/SessionsView.test.tsx
• webapp/src/views/SessionsView.tsx

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Walkthrough

Adds a new /sessions route and sidebar entry for SessionsView. The view loads compiled session pages, supports filtering and newest-first sorting, displays metadata and subjects, handles loading/error/availability states, and opens selected pages in the browse drawer.

Changes

Sessions feature

Layer / File(s)	Summary
Session loading and card rendering webapp/src/views/SessionsView.tsx, webapp/src/views/SessionsView.test.tsx	SessionsView fetches session pages, filters and sorts them, renders session cards and conditional states, and tests loading, filtering, metadata, errors, availability, and navigation.
Sessions route and shell navigation webapp/src/App.tsx, webapp/src/components/Shell.tsx, webapp/src/components/Shell.test.tsx	Registers /sessions, adds the Sessions sidebar item and page title, and verifies the connected navigation link.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Sequence Diagram(s)

sequenceDiagram
  participant SessionsView
  participant useConnection
  participant useFanout
  participant BrowseRoute
  SessionsView->>useConnection: Read aggregated connection mode
  SessionsView->>useFanout: Request session pages with type session
  useFanout-->>SessionsView: Return session page records or error
  SessionsView->>BrowseRoute: Navigate to selected page browse route

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/webapp-sessions-view

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[github-actions]

this PR changes UI (web/, src/vouch/web/, or webapp/) but has no before/after screenshots in the description. UI changes are reviewed by screenshot, not by running the app. add before and after screenshots, then reopen.

[github-actions]

this PR changes UI (web/, src/vouch/web/, or webapp/) but has no before/after screenshots in the description. UI changes are reviewed by screenshot, not by running the app. add before and after screenshots, then reopen.