feat: deterministic scheduler → real Now/Next/Later (P2 thin slice)

CommiTea now recommends its own next unit of work from the live backlog.

- @commitea/core: `schedule()` — dependency topo-sort with priority +
  estimate tie-breaks, single serial capacity, cycle detection, and
  critical-path marking; `selectFocus()` takes the top three. Pure,
  deterministic; the LLM does none of this. +11 tests (39 in core).
  Client gains `getIssueDependencies`.
- main: reconcile also fetches native issue dependencies for the open
  scope and returns edges.
- renderer: `scheduleFocus()` maps real issues+deps→Now/Next/Later;
  Focus renders scheduler output (fixture fallback when unconfigured).

v0 scope (each a later slice): single serial worker (per-person
capacity #8), point durations (Monte Carlo cone #10), estimate-only
(calibration #5). Verified: 14 e2e green (fixtures) + gated live spec —
the board shows the real 25 open + 9 closed, and Focus picks #2
ChangeSource (critical path) as Now. Screenshots confirmed.

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

apps/desktop/src/main/gitea.ts

@@ -51,9 +51,15 @@ export function registerGiteaIpc(): void {
   ipcMain.handle('gitea:status', () => ({ configured: !!config, repo }))
 
   ipcMain.handle('gitea:reconcile', async () => {
-    if (!client) return { configured: false, issues: [], milestones: [] }
+    if (!client) return { configured: false, issues: [], milestones: [], deps: [] }
     const [issues, milestones] = await Promise.all([client.listIssues(), client.listMilestones()])
-    return { configured: true, issues, milestones }
+    // dependency edges among the open scope (the scheduler only plans what's left)
+    const open = issues.filter((i) => i.state === 'open')
+    const perIssue = await Promise.all(
+      open.map(async (i) => ({ issue: i.number, dependsOn: await client.getIssueDependencies(i.number) })),
+    )
+    const deps = perIssue.flatMap(({ issue, dependsOn }) => dependsOn.map((d) => ({ issue, dependsOn: d })))
+    return { configured: true, issues, milestones, deps }
   })
 
   ipcMain.handle('gitea:getIssue', async (_event, index: number) => {