Implement complete CLI commands for MVP-1 Personal Tracker

- Refactored CLI commands from nested Typer subapps to direct command functions
- Fixed main.py to use app.command() instead of app.add_typer_command()
- Fixed project_service.py to properly load projects from YAML
- Fixed file_storage.py to save session JSON files alongside markdown
- Added missing methods: write_file, read_file, extract_autogen_section, get_recent_sessions
- Fixed root_path and repo_path to use strings instead of Path objects

tracker/services/project_service.py

@@ -5,6 +5,8 @@ from datetime import datetime
 from pathlib import Path
 from typing import Optional
 
+import yaml
+
 from ..models import Project
 
 
@@ -49,8 +51,8 @@ def create_project(
         type=type,
         status="inbox",
         tags=tags,
-        root_path=_PROJECTS_ROOT / slug,
-        repo_path=repo_path,
+        root_path=str(_PROJECTS_ROOT / slug),
+        repo_path=str(repo_path) if repo_path else None,
         created_at=datetime.now(),
         updated_at=datetime.now(),
     )
@@ -60,12 +62,20 @@ def create_project(
 def get_project(slug: str) -> Optional[Project]:
     """
     Get a project by slug.
-    Note: This reads from file system - placeholder for storage integration.
+    Reads from meta/project.yaml in the project directory.
     """
     meta_path = _get_project_meta_path(slug)
     if not meta_path.exists():
         return None
-    # TODO: Load from storage (YAML)
+
+    try:
+        with open(meta_path, "r", encoding="utf-8") as f:
+            data = yaml.safe_load(f)
+        if data:
+            return Project(**data)
+    except (yaml.YAMLError, TypeError):
+        pass
+
     return None