feat: Add user tracking to project tasks and notes

- Implemented user tracking columns in project_tasks and notes tables.
- Added created_by and assigned_to fields to project_tasks.
- Introduced created_by field and is_system flag in notes.
- Updated API endpoints to handle user tracking during task and note creation.
- Enhanced database initialization to include new columns and indexes.
- Created utility functions to fetch users for task assignment.
- Updated front-end components to display user information for tasks and notes.
- Added tests for project-tasks API endpoints to verify functionality.

src/lib/init-db.js

@@ -196,11 +196,72 @@ export default function initializeDatabase() {
 		// Column already exists, ignore error
 	}
 
-	// Add foreign key indexes for performance
+	// Migration: Add user tracking columns to project_tasks table
 	try {
 		db.exec(`
-			CREATE INDEX IF NOT EXISTS idx_projects_created_by ON projects(created_by);
-			CREATE INDEX IF NOT EXISTS idx_projects_assigned_to ON projects(assigned_to);
+			ALTER TABLE project_tasks ADD COLUMN created_by TEXT;
+		`);
+	} catch (e) {
+		// Column already exists, ignore error
+	}
+
+	try {
+		db.exec(`
+			ALTER TABLE project_tasks ADD COLUMN assigned_to TEXT;
+		`);
+	} catch (e) {
+		// Column already exists, ignore error
+	}
+
+	try {
+		db.exec(`
+			ALTER TABLE project_tasks ADD COLUMN created_at TEXT;
+		`);
+	} catch (e) {
+		// Column already exists, ignore error
+	}
+
+	try {
+		db.exec(`
+			ALTER TABLE project_tasks ADD COLUMN updated_at TEXT;
+		`);
+	} catch (e) {
+		// Column already exists, ignore error
+	}
+
+	// Create indexes for project_tasks user tracking
+	try {
+		db.exec(`
+			CREATE INDEX IF NOT EXISTS idx_project_tasks_created_by ON project_tasks(created_by);
+			CREATE INDEX IF NOT EXISTS idx_project_tasks_assigned_to ON project_tasks(assigned_to);
+		`);
+	} catch (e) {
+		// Index already exists, ignore error
+	}
+
+	// Migration: Add user tracking columns to notes table
+	try {
+		db.exec(`
+			ALTER TABLE notes ADD COLUMN created_by TEXT;
+		`);
+	} catch (e) {
+		// Column already exists, ignore error
+	}
+
+	try {
+		db.exec(`
+			ALTER TABLE notes ADD COLUMN is_system INTEGER DEFAULT 0;
+		`);
+	} catch (e) {
+		// Column already exists, ignore error
+	}
+
+	// Create indexes for notes user tracking
+	try {
+		db.exec(`
+			CREATE INDEX IF NOT EXISTS idx_notes_created_by ON notes(created_by);
+			CREATE INDEX IF NOT EXISTS idx_notes_project_id ON notes(project_id);
+			CREATE INDEX IF NOT EXISTS idx_notes_task_id ON notes(task_id);
 		`);
 	} catch (e) {
 		// Index already exists, ignore error