feat: add Pomodoro timer functionality with logging and project goals

- Implemented Pomodoro timer in the app, allowing users to start, pause, and stop sessions.
- Added context for managing Pomodoro state and actions.
- Integrated time logging for completed sessions to track productivity.
- Enhanced project settings to include time goals and Pomodoro settings.
- Created migration scripts to update the database schema for new project fields and time logs.
- Updated UI components to display Pomodoro controls and project time summaries.
- Added category filtering for projects in the project list view.

backend/app/schemas.py

@@ -54,6 +54,11 @@ class ProjectBase(BaseModel):
 
 class ProjectCreate(ProjectBase):
     statuses: Optional[List[str]] = None
+    category: Optional[str] = None
+    weekly_hours_goal: Optional[int] = None
+    total_hours_goal: Optional[int] = None
+    pomodoro_work_minutes: Optional[int] = None
+    pomodoro_break_minutes: Optional[int] = None
 
 
 class ProjectUpdate(BaseModel):
@@ -61,12 +66,22 @@ class ProjectUpdate(BaseModel):
     description: Optional[str] = None
     statuses: Optional[List[str]] = None
     is_archived: Optional[bool] = None
+    category: Optional[str] = None
+    weekly_hours_goal: Optional[int] = None
+    total_hours_goal: Optional[int] = None
+    pomodoro_work_minutes: Optional[int] = None
+    pomodoro_break_minutes: Optional[int] = None
 
 
 class Project(ProjectBase):
     id: int
     statuses: List[str]
     is_archived: bool
+    category: Optional[str] = None
+    weekly_hours_goal: Optional[int] = None
+    total_hours_goal: Optional[int] = None
+    pomodoro_work_minutes: Optional[int] = None
+    pomodoro_break_minutes: Optional[int] = None
     created_at: datetime
     updated_at: datetime
 
@@ -105,3 +120,30 @@ class ImportResult(BaseModel):
     project_id: int
     project_name: str
     tasks_created: int
+
+
+# TimeLog Schemas
+class TimeLogCreate(BaseModel):
+    minutes: int
+    note: Optional[str] = None
+    session_type: str = "manual"  # 'pomodoro' | 'manual'
+
+
+class TimeLog(BaseModel):
+    id: int
+    task_id: int
+    minutes: int
+    note: Optional[str] = None
+    session_type: str
+    logged_at: datetime
+
+    model_config = ConfigDict(from_attributes=True)
+
+
+class ProjectTimeSummary(BaseModel):
+    total_minutes: int
+    pomodoro_minutes: int
+    manual_minutes: int
+    weekly_minutes: int
+    weekly_hours_goal: Optional[int] = None
+    total_hours_goal: Optional[int] = None