feat(app): add incremental React session path (#1362)

* feat(server): add workspace session read APIs

Expose workspace-scoped session list, detail, message, and snapshot reads so the client can fetch session data without depending on activation choreography.

* feat(app): route mounted session reads through OpenWork APIs

Use the new workspace-scoped session read endpoints for mounted OpenWork clients so the current frontend stops depending on direct session proxy reads for list, detail, message, and todo loading.

* feat(app): add React read-only session transcript

Introduce a feature-gated React island for the session transcript so we can replace the session surface incrementally while keeping the Solid shell intact.

* feat(app): add React session composer surface

Extend the feature-gated React session island to own its draft, prompt send, stop flow, and snapshot polling so the session body can evolve independently from the Solid composer.

* feat(app): add React session transition model

Keep the React session surface stable during session switches by tracking rendered vs intended session state and exposing a developer debug panel for render-source and transition inspection.

* docs(prd): add React migration plan to repo

Copy the incremental React adoption PRD into the OpenWork repo so the migration plan lives next to the implementation and PR branch.

* docs(prd): sync full React migration plan

Replace the shortened repo copy with the full incremental React adoption PRD so the implementation branch and product plan stay in sync.

* feat(desktop): add React session launch modes

Add dedicated Tauri dev and debug-build entrypoints for the React session path and honor a build-time React session flag before local storage so the alternate shell is easy to launch and reproduce.

* fix(app): fall back to legacy mounted session reads

Keep the new app working against older OpenWork servers by falling back to the original mounted OpenCode session reads when the workspace-scoped session read APIs are unavailable.

apps/server/package.json

@@ -44,7 +44,8 @@
   "dependencies": {
     "jsonc-parser": "^3.2.1",
     "minimatch": "^10.0.1",
-    "yaml": "^2.6.1"
+    "yaml": "^2.6.1",
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "@types/node": "^22.10.2",