Fix issues from QA review: cache invalidation, model server_default, route comment

- Add ['tracked-tasks'] cache invalidation to toggle mutations in
  ProjectDetail and ProjectCard so dashboard widget stays fresh
- Add server_default=sa.false() to model for consistency with migration
- Add route ordering comment above /tracked-tasks endpoint

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/app/models/project.py

@@ -1,3 +1,4 @@
+import sqlalchemy as sa
 from sqlalchemy import Boolean, String, Text, Date, func
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 from datetime import datetime, date
@@ -14,7 +15,7 @@ class Project(Base):
     status: Mapped[str] = mapped_column(String(20), default="not_started")
     color: Mapped[Optional[str]] = mapped_column(String(20), nullable=True)
     due_date: Mapped[Optional[date]] = mapped_column(Date, nullable=True)
-    is_tracked: Mapped[bool] = mapped_column(Boolean, default=False)
+    is_tracked: Mapped[bool] = mapped_column(Boolean, default=False, server_default=sa.false())
     created_at: Mapped[datetime] = mapped_column(default=func.now())
     updated_at: Mapped[datetime] = mapped_column(default=func.now(), onupdate=func.now())
 

backend/app/routers/projects.py

@@ -58,6 +58,7 @@ async def get_projects(
     return projects
 
 
+# This route MUST be defined before /{project_id} to avoid path parameter shadowing
 @router.get("/tracked-tasks", response_model=List[TrackedTaskResponse])
 async def get_tracked_tasks(
     days: int = Query(7, ge=1, le=90),

frontend/src/components/projects/ProjectCard.tsx

@@ -42,6 +42,7 @@ export default function ProjectCard({ project }: ProjectCardProps) {
     },
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: ['projects'] });
+      queryClient.invalidateQueries({ queryKey: ['tracked-tasks'] });
       toast.success(project.is_tracked ? 'Project untracked' : 'Project tracked');
     },
     onError: () => {

frontend/src/components/projects/ProjectDetail.tsx

@@ -196,6 +196,7 @@ export default function ProjectDetail() {
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: ['projects'] });
       queryClient.invalidateQueries({ queryKey: ['projects', id] });
+      queryClient.invalidateQueries({ queryKey: ['tracked-tasks'] });
       toast.success(project?.is_tracked ? 'Project untracked' : 'Project tracked');
     },
     onError: () => {