docs(15-02): complete AppLayout CSS foundation + sidebar components plan

.planning/phases/15-dashboard-tablos/15-02-SUMMARY.md

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+---
+phase: 15-dashboard-tablos
+plan: "02"
+subsystem: backend/web/templates/css
+tags: [css, templ, sidebar, dashboard, wave-1]
+dependency_graph:
+  requires: [15-01]
+  provides: [AppLayout, DashboardSidebar, SidebarProjectsSection, SidebarOrganizationFooter, app.css]
+  affects:
+    - backend/internal/web/ui/app.css
+    - backend/tailwind.input.css
+    - backend/templates/app_layout.templ
+    - backend/templates/app_layout_helpers.go
+tech_stack:
+  added: []
+  patterns: [templ component composition, CSS design token usage, sidebar nav active state]
+key_files:
+  created:
+    - backend/internal/web/ui/app.css
+    - backend/templates/app_layout.templ
+    - backend/templates/app_layout_helpers.go
+  modified:
+    - backend/tailwind.input.css
+decisions:
+  - "SidebarNavIcon implemented inline in app_layout.templ (not extending UIIcon) to avoid cross-package coupling for sidebar-only icons"
+  - "Tasks/Chat/Files nav items render as non-interactive divs (no href) per D-N02 — visual-only in Phase 15"
+  - "SidebarOrganizationFooter shows user email as both avatar initial and name; no separate org concept in Phase 15"
+  - "app.css imports 18 CSS sections ported verbatim from go-backend with all var(--...) tokens preserved"
+metrics:
+  duration: ~15min
+  completed: "2026-05-16"
+  tasks_completed: 2
+  files_modified: 4
+---
+
+# Phase 15 Plan 02: AppLayout CSS Foundation + Templ Components Summary
+
+Dashboard shell CSS (sidebar, project-card) ported verbatim from go-backend, plus AppLayout + DashboardSidebar + SidebarProjectsSection + SidebarOrganizationFooter templ components with isActivePath and sidebarPrimaryNavItems helpers — all compile cleanly.
+
+## Tasks Completed
+
+| Task | Name | Commit | Files |
+|------|------|--------|-------|
+| 1 | Port sidebar + project-card CSS into app.css and register in tailwind | f533d53 | backend/internal/web/ui/app.css, backend/tailwind.input.css |
+| 2 | Create app_layout_helpers.go and app_layout.templ with all sidebar sub-components | 9b0d335 | backend/templates/app_layout.templ, backend/templates/app_layout_helpers.go |
+
+## Acceptance Criteria Verification
+
+### Task 1
+- `backend/internal/web/ui/app.css` exists with `.dashboard-shell`: PASSED (1 match)
+- File contains `.project-card`: PASSED (7 matches)
+- File contains `.sidebar-organization`: PASSED (1 match)
+- No hard-coded hex colors: PASSED (0 matches)
+- `backend/tailwind.input.css` imports app.css: PASSED (1 match)
+- `go build ./...` exits 0: PASSED
+
+### Task 2
+- `templ generate ./...` exits 0: PASSED
+- `go build ./...` exits 0: PASSED
+- `app_layout.templ` contains `templ AppLayout(`: PASSED (1 match)
+- `app_layout.templ` contains `templ DashboardSidebar(`: PASSED (1 match)
+- `app_layout.templ` contains `templ SidebarProjectsSection(`: PASSED (1 match)
+- `app_layout.templ` contains `templ SidebarOrganizationFooter(`: PASSED (1 match)
+- `app_layout_helpers.go` contains `func isActivePath`: PASSED (1 match)
+- `app_layout_helpers.go` contains `func sidebarPrimaryNavItems`: PASSED (1 match)
+- `go test ./... -count=1` exits 0 (all existing tests pass): PASSED
+
+## Deviations from Plan
+
+None — plan executed exactly as written.
+
+## Known Stubs
+
+None — this plan delivers CSS and templ components only. No data wiring; AppLayout is ready to be called by handlers in Plan 03.
+
+## Threat Flags
+
+None — CSS and templ component changes only. No new network endpoints or auth paths introduced.
+
+## Self-Check: PASSED
+
+- File exists: backend/internal/web/ui/app.css — FOUND
+- File exists: backend/templates/app_layout.templ — FOUND
+- File exists: backend/templates/app_layout_helpers.go — FOUND
+- Commit f533d53 exists — FOUND
+- Commit 9b0d335 exists — FOUND
+- templ generate + go build + go test all exit 0 — VERIFIED