feat(doc-mode): unified surface — ephemeral tasks, tmp/, /exec redirect, palette, SWR (#117)

Phases 1-3 of the unified-surface plan, bundled per the user's request.
The directive document/folder UI is now the canonical place to interact
with makima; legacy /exec is subsumed by routing redirects, /contracts is
already hidden in nav, and orphan tasks surface under a top-level tmp/
pseudo-folder. Phase 4 (porting contract-only features) was confirmed
out of scope; Phase 5 (deleting the contracts code) is a follow-up.

## Backend

- New migration `20260501000000_archive_existing_contracts.sql` flips
  every legacy contract to `archived` so /contracts is read-only history.
- New endpoint `POST /api/v1/directives/{id}/tasks` creates an ephemeral
  task — `directive_id` set, `directive_step_id` NULL, repo/branch
  inherited from the directive. Reuses `create_task_for_owner`.
- New endpoint `GET /api/v1/directives/{id}/tasks` lists ephemeral tasks
  attached to a directive (drives the per-folder ephemeral group).
- `GET /api/v1/mesh/tasks?orphan=true` returns top-level tasks with no
  `directive_id` AND no `parent_task_id` — backs the sidebar's tmp/.
- New repo helpers `list_ephemeral_directive_tasks_for_owner` and
  `list_orphan_tasks_for_owner`.
- The existing `mesh_merge` endpoints are reused as-is for ephemeral
  task merge (no new merge logic needed).

## Frontend

### Sticky composer + auto-scroll fix (`DocumentTaskStream.tsx`)
- Sticky comment composer pinned to viewport bottom; padding compensates
  so the last entry isn't hidden behind it.
- `autoScroll` now resumes when the user scrolls back within 80px of
  the bottom (previously stuck off forever after a single scroll-up).
- Floating "↓ Jump to latest" chip when the user has scrolled away.
- Action header strip: explicit Stop / Send / Open-in-task-page +
  conditional "Merge to base ↗" button on ephemeral terminal tasks.
- Module-level cache of historical entries by taskId so re-selecting a
  task you've viewed renders instantly while a fresh fetch runs.

### Sidebar (`document-directives.tsx`)
- Top-level `tmp/` folder: orphan tasks, polled every 5s.
- Per-directive `tasks/` subfolder now also surfaces ephemeral tasks
  (lazily fetched on folder open) with a distinct asterisk-on-terminal
  icon (`EphemeralTaskIcon`).
- Inline hover-action chips on each directive folder header: Start /
  Pause / PR / +New task. Right-click menu still works as a power-user
  fallback.
- "Now executing" amber strip in the editor pane: surfaces the live
  orchestrator/completion/running-step task with a one-click jump.
- Inline `+ New task` modal (name + plan); on submit calls
  `createDirectiveTask` and navigates into the freshly-spawned task.
- New `EphemeralAwareTaskStream` wrapper passes `ephemeral` and
  `status` to `DocumentTaskStream` so the merge button only shows when
  the selected task is genuinely an ephemeral spinoff in a terminal
  state. Step-spawned tasks merge via the directive's PR completion.

### SWR cache (`useDirectives.ts`)
- Module-level `listCache` and per-id `detailCache` (mirrors the pattern
  in `useUserSettings.ts`). Mounting the hook renders the cache value
  immediately if present and kicks a background refresh; subscribers see
  the new value when it lands. Cuts perceived navigation latency to
  near-zero on warm cache hits.

### QuickSwitcher (`QuickSwitcher.tsx`, new)
- IntelliJ-style double-Shift command palette mounted at app root.
- Listens at the document level for two `Shift` keydowns within 300ms
  with no other key in between; ignores while focus is in an
  input/textarea so capitalising letters doesn't pop the palette.
- Searches across directives + their tasks (orchestrator/completion/
  steps/ephemerals) + orphan tmp tasks. Fuzzy matches on title.
- Eagerly loads task details for the first 20 directives on open so
  searches don't block on per-directive fetches.

### Routing (`main.tsx` + `exec-redirect.tsx` + `tmp.tsx`)
- New `ExecRedirect` wrapper at `/exec/:id`: when documentMode is on
  AND the task has a `directiveId`, replaces the URL with
  `/directives/<directiveId>?task=<taskId>`. Otherwise renders the
  legacy `MeshPage` as before.
- New `/tmp/:taskId` route renders `DocumentTaskStream` standalone for
  orphan tasks, with the masthead and a `tmp / <slug>` breadcrumb.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

1 files changed, 13 insertions, 1 deletions

diff --git a/makima/frontend/src/main.tsx b/makima/frontend/src/main.tsx
index 4f7c525..bbb72f3 100644
--- a/makima/frontend/src/main.tsx
+++ b/makima/frontend/src/main.tsx
@@ -7,6 +7,7 @@ import { SupervisorQuestionsProvider } from "./contexts/SupervisorQuestionsConte
 import { GridOverlay } from "./components/GridOverlay";
 import { SupervisorQuestionNotification } from "./components/SupervisorQuestionNotification";
 import { PhaseConfirmationNotification } from "./components/PhaseConfirmationNotification";
+import { QuickSwitcher } from "./components/QuickSwitcher";
 import { ProtectedRoute } from "./components/ProtectedRoute";
 import HomePage from "./routes/_index";
 import ListenPage from "./routes/listen";
@@ -21,6 +22,8 @@ import SettingsPage from "./routes/settings";
 import ContractFilePage from "./routes/contract-file";
 import SpeakPage from "./routes/speak";
 import DirectivesPage from "./routes/directives";
+import ExecRedirect from "./routes/exec-redirect";
+import TmpTaskPage from "./routes/tmp";
 
 createRoot(document.getElementById("root")!).render(
   <StrictMode>
@@ -30,6 +33,7 @@ createRoot(document.getElementById("root")!).render(
           <GridOverlay />
           <SupervisorQuestionNotification />
           <PhaseConfirmationNotification />
+          <QuickSwitcher />
           <Routes>
           <Route path="/" element={<HomePage />} />
           <Route path="/login" element={<LoginPage />} />
@@ -109,7 +113,15 @@ createRoot(document.getElementById("root")!).render(
             path="/exec/:id"
             element={
               <ProtectedRoute>
-                <MeshPage />
+                <ExecRedirect />
+              </ProtectedRoute>
+            }
+          />
+          <Route
+            path="/tmp/:taskId"
+            element={
+              <ProtectedRoute>
+                <TmpTaskPage />
               </ProtectedRoute>
             }
           />