Implement comprehensive Projects system for todo management

- Add Project model with status management (active/archived)
- Create ProjectCreate, ProjectUpdate, ProjectWithTodos schemas
- Implement full CRUD operations for projects with pagination
- Add project filtering by status and search functionality
- Add project_id foreign key to Todo model with relationship
- Update Todo API to support project filtering
- Create archive project endpoint
- Add comprehensive project endpoints:
  - GET /projects - list with filtering
  - POST /projects - create new project
  - GET /projects/{id} - get project with todos
  - PUT /projects/{id} - update project
  - DELETE /projects/{id} - delete project
  - GET /projects/{id}/todos - get project todos
  - PUT /projects/{id}/archive - archive project
- Update README with Projects system documentation
- Add migration for projects table and project_id field
- Clean up imports and remove obsolete tag references

🤖 Generated with [Claude Code](https://claude.ai/code)

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

app/api/v1/__init__.py

@@ -1,9 +1,11 @@
 from fastapi import APIRouter
 from .todos import router as todos_router
 from .categories import router as categories_router
+from .projects import router as projects_router
 
 api_router = APIRouter()
 api_router.include_router(todos_router, prefix="/todos", tags=["todos"])
 api_router.include_router(categories_router, prefix="/categories", tags=["categories"])
+api_router.include_router(projects_router, prefix="/projects", tags=["projects"])
 
 __all__ = ["api_router"]

app/models/__init__.py

@@ -1,7 +1,5 @@
 from .todo import Todo
 from .category import Category
 from .project import Project
-from .tag import Tag
-from .todo_tag import todo_tags
 
-__all__ = ["Todo", "Category", "Project", "Tag", "todo_tags"]
+__all__ = ["Todo", "Category", "Project"]

app/models/todo.py

@@ -32,9 +32,6 @@ class Todo(Base):
     # Relationship to category
     category = relationship("Category", back_populates="todos")
 
-    # Many-to-many relationship with tags
-    tags = relationship("Tag", secondary="todo_tags", back_populates="todos")
-
     # Self-referential relationship for subtasks
     parent = relationship("Todo", remote_side=[id], back_populates="children")
     children = relationship(

app/schemas/__init__.py

@@ -1,6 +1,5 @@
 from .todo import Todo, TodoCreate, TodoUpdate, TodoListResponse
 from .category import Category, CategoryCreate, CategoryUpdate
-from .tag import Tag, TagCreate, TagUpdate, TagListResponse
 from .project import (
     Project,
     ProjectCreate,
@@ -17,10 +16,6 @@ __all__ = [
     "Category",
     "CategoryCreate",
     "CategoryUpdate",
-    "Tag",
-    "TagCreate",
-    "TagUpdate",
-    "TagListResponse",
     "Project",
     "ProjectCreate",
     "ProjectUpdate",