jobs: master-detail JobsPage (list + detail, resizable) for /jobs and /jobs/:id

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/jobs-unification.md

@@ -76,9 +76,10 @@ Favor power-user affordances over guardrails. See memory `sole-user-assume-compe
       Router mounted at `/jobs` and `/pipeline-jobs`. *Needs a restart to deploy; then curl/phone-testable.*
       WS consolidation still pending (old `/api/tasks/run/ws` + `/api/tasks/pipeline/ws` still live).
 - [~] 3 frontend
-  - [x] 3a JobDetail script branch — `ScriptJobDetail` (terminal, polls `GET /jobs/:id/log` + status,
-        Stop button) + `JobDetailView` wrapper routing by `mode` (pipeline detail renamed
-        `PipelineJobDetail`). Script jobs are now viewable at `/jobs/:id`.
+  - [x] 3a jobs UI — **master-detail** `JobsPage` (like `/chat`): `WorkspaceLayout` with a list panel
+        (left, polls `GET /jobs`, highlights active) + a detail panel (right) that branches by `mode`
+        — `ScriptJobDetail` terminal (polls log + status, Stop) or `PipelineJobDetail`. One page serves
+        both `/jobs` and `/jobs/:id`; list click navigates. Replaced the old separate list/detail pages.
   - [ ] 3b `/jobs/new` page — extract the input UI (TaskInputForm + per-group config + folder probing)
         from `TaskRunnerModal` into a shared component; Run/Queue → `POST /jobs` → navigate.
   - [x] `inline` flag plumbed (parser + list/detail endpoints); 3 quick tasks flagged.