Update dependencies and enhance UI components for better functionality

- Added new Tauri plugins: @tauri-apps/plugin-process and @tauri-apps/plugin-updater to improve application capabilities.
- Introduced UpdateStatus component to display update information in the UI.
- Enhanced GenerationForm to include an optional instruct field for additional input.
- Refactored various components for improved styling and responsiveness, including Sidebar, AudioPlayer, and ProfileCard.
- Updated API models and schemas to accommodate new instruct parameter in generation requests and responses.
- Improved documentation for autoupdater setup and usage.

backend/migrate_add_instruct.py

@@ -0,0 +1,48 @@
+"""
+Database migration script to add instruct column to generations table.
+
+Run this once to update existing databases:
+    python -m backend.migrate_add_instruct
+"""
+
+import sqlite3
+import os
+from pathlib import Path
+
+
+def migrate():
+    """Add instruct column to generations table if it doesn't exist."""
+    # Get data directory
+    data_dir = os.environ.get("VOICEBOX_DATA_DIR")
+    if data_dir:
+        db_path = Path(data_dir) / "voicebox.db"
+    else:
+        db_path = Path.cwd() / "data" / "voicebox.db"
+
+    if not db_path.exists():
+        print(f"Database not found at {db_path}, skipping migration")
+        return
+
+    conn = sqlite3.connect(db_path)
+    cursor = conn.cursor()
+
+    # Check if instruct column already exists
+    cursor.execute("PRAGMA table_info(generations)")
+    columns = [row[1] for row in cursor.fetchall()]
+
+    if 'instruct' in columns:
+        print("instruct column already exists, skipping migration")
+        conn.close()
+        return
+
+    # Add instruct column
+    print("Adding instruct column to generations table...")
+    cursor.execute("ALTER TABLE generations ADD COLUMN instruct TEXT")
+    conn.commit()
+    conn.close()
+
+    print("Migration complete!")
+
+
+if __name__ == "__main__":
+    migrate()