feat(desktop): complete the P3 screens — Board, Runway, Issue, Capture (#17–#20)

Ports the nine remaining design-handoff screens to typed TSX and wires
them into the shell, retiring the placeholders for every primary view.

- The pot (#17 / P3-4): BoardScreen 5-column kanban with live search +
  empty state, Tabs into GanttView (state bars, critical inset rules,
  dotted 80% tails, today rule) and DepsGraph (layered DAG, bezier edges,
  spruce critical path, milestone terminal).
- Runway (#18 / P3-5): RunwayScreen (range bars via RunwayBar, capacity,
  calibration teaser), CalibrationScreen (scatter + honest diagonal +
  ×1.18 fit, per-label/per-person bias), MilestoneScreen (stats strip,
  cone, grouped issues).
- Issue + Inbox (#19 / P3-6): IssueScreen (human intent left, machine-
  derived lifecycle/forecast/deps right, "writes as you" composer),
  InboxScreen (day-grouped, filter tabs, unread dots, mark-all-read).
- Capture (#20 / P3-7): CaptureScreen dump→interview→review→filed state
  machine with running clock.

Shell: openIssue now carries an IssueRef; adds readIds (inbox) + issue
state; routes board/runway/calibration/milestone/issue/inbox/capture and
the runway→calibration/milestone + issue back-stack. Focus/Standup pass
IssueRefs. Select/Input gain defaultValue (Capture's editable tray).
Fixtures mirrored from data.js. typecheck + 11 e2e green; all nine
screens screenshot-verified in light.

Closes P3-4, P3-5, P3-6, P3-7.

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

apps/desktop/e2e/pages/app.page.ts

@@ -20,9 +20,11 @@ export class AppPage {
     return this.page.getByText('CommiTea', { exact: true })
   }
 
-  /** Navigate via a left-rail entry by its label. */
+  /** Navigate via a left-rail entry by its label. Scoped to the Primary rail so
+   * it never collides with in-screen breadcrumb buttons of the same name, and
+   * matches by prefix so count badges (e.g. "Inbox 3") still resolve. */
   nav(label: string): Locator {
-    return this.page.getByRole('button', { name: label, exact: true })
+    return this.page.getByRole('navigation', { name: 'Primary' }).getByRole('button', { name: label })
   }
 
   /** Assert the shell has rendered. */