fix(#101): Remediate code review findings for TaskProgressWidget

- Fix CRITICAL: Replace .sort() state mutation with [...tasks].sort()
- Fix CRITICAL: Replace PDA-unfriendly red colors with calm amber tones
- Fix IMPORTANT: Add TaskProgressWidget + ActiveProjectsWidget to WidgetComponentType
- Fix IMPORTANT: Add tests for interval cleanup, HTTP error responses, slice limit
- 3 new tests added (10 total)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/shared/src/types/widget.types.ts

@@ -69,6 +69,8 @@ export type WidgetComponentType =
   | "CalendarWidget"
   | "QuickCaptureWidget"
   | "AgentStatusWidget"
+  | "ActiveProjectsWidget"
+  | "TaskProgressWidget"
   | "StatCardWidget"
   | "ChartWidget"
   | "ListWidget"