2.5.3 The `/issues` route — tree-table + header + toolbar + empty/loading

Estimate: 16m · Depends on: 2.5.1, 2.5.2

Replace the ProjectStubPage at app/(authed)/issues/page.tsx with the real surface. The Server Component resolves the active project (getActiveProject() → /dashboard if none), calls getProjectTree (2.5.1), and renders, top to bottom per tree.png: the "Issues" header + "All issues in {project}" subtitle; the toolbar — a [Filter] button (a disabled/placeholder shell here; wired in 2.5.4), the [Tree ▾] view-switcher (renders "Tree" as the active/only v1 mode — the documented seam for a future List mode), and the [+ New issue] button reusing 2.3.3's CreateIssueModal trigger; and the TreeTable (2.5.2) with the three columns — TITLE (IssueTypeIcon + identifier + title, the whole row linking to /issues/{identifier}), ASSIGNEE (avatar + name, "Unassigned" empty), STATUS (Pill by category).

Empty + loading states (mockup panels 2 & 3). A project with no issues renders the centered EmptyState ("No issues yet" / "Create your first issue to start tracking work." / a New-issue CTA). A Suspense/loading boundary renders the skeleton table (header + shimmer rows) drawn in panel 3. Expand/collapse state is client-held (default: roots expanded one level, matching the mockup); no per-row persistence in v1.

Acceptance criteria

• /issues renders the active project's issues as the nested TreeTable with TITLE/ASSIGNEE/STATUS exactly per tree.png; each row links to its /issues/[key] detail page; rows expand/collapse.
• Header + subtitle + the [Filter] · [Tree ▾] · [+ New issue] toolbar render; "New issue" opens 2.3.3's CreateIssueModal (no second create path); the view-switcher shows "Tree".
• An empty project renders the drawn EmptyState; a loading boundary renders the skeleton table.
• 4-layer + explicit workspace gate (the page never queries Prisma directly); colours via --el-*; type icons take their type hue, status via Pill tones.
• Vitest over the page's data shaping (real PG: project-scoped nesting, empty); the route joins the shell-a11y sweep in 2.5.6 (needs the seeded fixture that spec builds).

Context refs

• design/work-items/tree.png — all 3 panels (populated · empty · skeleton)
• app/(authed)/issues/page.tsx (the stub to replace) + _components/ProjectStubPage; getActiveProject(); the 2.4.1 /issues/[key] detail page as the sibling/route convention
• 2.3.3 CreateIssueModal / CreateIssueProvider / CreateIssueTrigger; EmptyState / Button / Pill / IssueTypeIcon; 2.5.2 TreeTable; 2.5.1 getProjectTree
• motir-core/CLAUDE.md — Server Component / 4-layer / --el-*