feat: capture_work — braindump → decomposed issues → filed in gitea (P4)

The last big agent capability. In the Capture screen, a rough braindump runs real
big-model decomposition into a small, estimated issue set; you review/edit the
labels and approve, and the issues are opened in gitea. This is the one place the
big model earns its keep (docs/agent-tools.md).

core (@commitea/core):
- capture-work: PROPOSE_ISSUES_TOOL + CAPTURE_SYSTEM; captureWork(complete, dump)
  forces a single structured decomposition and returns validated issues; parseCaptureArgs
  drops blank titles + invalid est/p labels. ProposedIssue / CaptureProposal.
- gitea client: createIssue({title, body?, labelIds?}) → POST /issues, normalized.

app:
- model bridge model:capture runs captureWork on the (loaded) big model.
- gitea bridge gitea:createIssues opens each approved issue with its est/* + p/*
  labels (reusing the #41 label-id resolver — zero-pollution, no invented labels).
- Capture screen: when a model is configured, "Brew tickets" runs real capture and
  "Approve all" files the set; otherwise the scripted demo interview runs. Fixed a
  race — the brew handler re-checks model status at click time so a configured
  model never falls into the scripted path before status resolves.

Verified: 108 core tests green (7 capture + createIssue added), desktop typecheck
clean, 14 fixture e2e green. Gated live e2e against gemma-4-26b: the auth braindump
→ 3 real tickets ("Resolve token refresh + session staleness" est/3d p/1, "Fix
webhook double-firing" est/2d p/2, "Write auth setup docs" est/1d p/3), reviewable
and editable; Discard so the test files nothing (createIssue POST is unit-tested).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/desktop/src/main/gitea.ts

@@ -124,4 +124,21 @@ export function registerGiteaIpc(): void {
     const issue = await client.getIssue(change.issue)
     return { ok: true as const, plan, issue }
   })
+
+  // capture_work filing: open each approved issue with its est/* + p/* labels.
+  // Only touches the CommiTea label namespaces — no invented labels (zero-pollution).
+  ipcMain.handle(
+    'gitea:createIssues',
+    async (_event, issues: { title: string; body?: string; estimate?: string; priority?: string }[]) => {
+      if (!client) return { ok: false as const, reason: 'unconfigured' as const }
+      const created: { number: number; title: string }[] = []
+      for (const it of issues) {
+        const names = [it.estimate, it.priority].filter((n): n is string => !!n)
+        const labelIds = await resolveLabelIds(names)
+        const issue = await client.createIssue({ title: it.title, body: it.body, labelIds })
+        created.push({ number: issue.number, title: issue.title })
+      }
+      return { ok: true as const, created }
+    },
+  )
 }