[31388f42] Feat: Persist drafts and enhance UI warnings

This commit introduces two key improvements to the Lead Engine:

1.  **Persistent Email Drafts:**
    - Adds a new  function to .
    - Modifies  to save generated email replies directly to the  column in the database, ensuring they persist across sessions.
    - Removes the previous session-based state for drafts.

2.  **Enhanced UI Visibility:**
    - Adds a warning icon (⚠️) directly to the lead expander's title if a lead is flagged as low-quality, making it easier to spot.

lead-engine/db.py

@@ -127,6 +127,14 @@ def update_lead_status(lead_id, status, response_draft=None):
     conn.commit()
     conn.close()
 
+def update_lead_draft(lead_id, draft_text):
+    """Saves a generated email draft to the database."""
+    conn = sqlite3.connect(DB_PATH)
+    c = conn.cursor()
+    c.execute('UPDATE leads SET response_draft = ? WHERE id = ?', (draft_text, lead_id))
+    conn.commit()
+    conn.close()
+
 def reset_lead(lead_id):
     """Resets a lead to 'new' status and clears enrichment data."""
     conn = sqlite3.connect(DB_PATH)