docs(06-02): complete renderer wiring plan

.planning/phases/06-renderer-architecture/06-02-SUMMARY.md

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+---
+phase: 06-renderer-architecture
+plan: 02
+subsystem: ui
+tags: [typescript, d3, strategy-pattern, renderer, refactor]
+
+requires:
+  - phase: 06-01
+    provides: ModeRenderer interface, RenderContext, registry, shared utility modules
+provides:
+  - YearModeRenderer implementing ModeRenderer for year-view heatmap
+  - Slim heatmap.ts orchestrator dispatching through renderer registry
+  - All test imports migrated to new module locations
+affects: [06-03, 07-mode-renderers]
+
+tech-stack:
+  added: []
+  patterns: [strategy-pattern dispatch via getRenderer(state.mode), metric-aware color fill]
+
+key-files:
+  created:
+    - assets/src/renderers/year.ts
+  modified:
+    - assets/src/renderers/types.ts
+    - assets/src/heatmap.ts
+    - assets/test/heatmap.test.ts
+    - assets/test/stats.test.ts
+    - assets/test/interaction.test.ts
+
+key-decisions:
+  - "Cell fill uses metric-aware accessor (hours vs count) for forward-compatible display toggle"
+  - "emptyMessage added to RenderContext to preserve filtered empty state messages"
+
+patterns-established:
+  - "Renderer dispatch: getRenderer(state.mode).render(ctx) in doRender()"
+  - "Module-level renderer registration: registerRenderer(new YearModeRenderer()) at import time"
+
+requirements-completed: []
+
+duration: 3min
+completed: 2026-04-09
+---
+
+# Phase 6 Plan 02: Renderer Wiring Summary
+
+**YearModeRenderer wired into strategy-pattern orchestrator, heatmap.ts reduced from 413 to 116 lines, all 62 tests passing**
+
+## Performance
+
+- **Duration:** 3 min
+- **Started:** 2026-04-09T07:44:14Z
+- **Completed:** 2026-04-09T07:47:26Z
+- **Tasks:** 2 automated + 1 checkpoint (pending human verification)
+- **Files modified:** 6
+
+## Accomplishments
+- Created YearModeRenderer that produces identical SVG output to v1.0 renderHeatmap()
+- Rewrote heatmap.ts as slim orchestrator using registry dispatch pattern
+- Migrated all test imports to new module locations -- 62/62 tests pass across 9 files
+- Added metric-aware cell fill (forward-compatible for hours/count toggle)
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Create YearModeRenderer and rewrite heatmap.ts orchestrator** - `aab3915` (feat)
+2. **Task 2: Migrate test imports and verify full suite** - `881718e` (refactor)
+3. **Task 3: Visual regression check** - checkpoint (pending human verification)
+
+## Files Created/Modified
+- `assets/src/renderers/year.ts` - YearModeRenderer implementing ModeRenderer with full year heatmap rendering
+- `assets/src/renderers/types.ts` - Added emptyMessage to RenderContext
+- `assets/src/heatmap.ts` - Slim orchestrator (116 lines, down from 413)
+- `assets/test/heatmap.test.ts` - Migrated from renderHeatmap to YearModeRenderer.render()
+- `assets/test/stats.test.ts` - Import path changed to shared/stats
+- `assets/test/interaction.test.ts` - Migrated from renderHeatmap to YearModeRenderer.render()
+
+## Decisions Made
+- Cell fill uses `ctx.state.metric === 'hours' ? d.entry.hours : d.entry.count` for forward-compatible metric toggle (no-op for v1.0 where metric is always 'hours')
+- emptyMessage added as optional field on RenderContext to preserve "No tracking data for this project" filtered empty message
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+None.
+
+## User Setup Required
+None - no external service configuration required.
+
+## Checkpoint: Visual Regression Check
+
+**Status:** Automated verification passed (build:dev succeeds). Manual visual verification pending.
+
+Verification steps for human:
+1. Start local Kimai dev environment
+2. Navigate to dashboard
+3. Verify heatmap renders identically: cells colored green, tooltip on hover, click navigates to timesheet, stats row present, filter dropdown works, resize re-renders
+4. Check browser console -- no errors
+5. Verify `typeof KimaiHeatmap.init === 'function'` in console
+
+## Next Phase Readiness
+- Renderer architecture fully wired -- adding new modes requires only implementing ModeRenderer and calling registerRenderer()
+- Ready for Plan 03 (mode switcher UI and additional renderers)
+
+## Self-Check: PASSED
+
+- All 6 created/modified files exist on disk
+- Both task commits verified (aab3915, 881718e)
+- Full test suite: 62/62 passing across 9 files
+- esbuild: produces valid IIFE bundle (38.9kb minified)