feat: add update functionality for Gmail drafts

- Introduced a new tool to update existing Gmail drafts, allowing users to modify draft content, recipients, and subject lines.
- Updated the Gmail tools registry to include the new update_gmail_draft tool.
- Enhanced the GmailKBSyncService to support draft ID handling during synchronization.
- Added UI components for the update draft functionality in the web application, improving user interaction with Gmail drafts.

surfsense_backend/app/agents/new_chat/tools/registry.py

@@ -51,6 +51,7 @@ from .gmail import (
     create_create_gmail_draft_tool,
     create_send_gmail_email_tool,
     create_trash_gmail_email_tool,
+    create_update_gmail_draft_tool,
 )
 from .google_calendar import (
     create_create_calendar_event_tool,
@@ -381,7 +382,7 @@ BUILTIN_TOOLS: list[ToolDefinition] = [
         requires=["db_session", "search_space_id", "user_id"],
     ),
     # =========================================================================
-    # GMAIL TOOLS - create drafts, send emails, trash emails
+    # GMAIL TOOLS - create drafts, update drafts, send emails, trash emails
     # Auto-disabled when no Gmail connector is configured
     # =========================================================================
     ToolDefinition(
@@ -414,6 +415,16 @@ BUILTIN_TOOLS: list[ToolDefinition] = [
         ),
         requires=["db_session", "search_space_id", "user_id"],
     ),
+    ToolDefinition(
+        name="update_gmail_draft",
+        description="Update an existing Gmail draft",
+        factory=lambda deps: create_update_gmail_draft_tool(
+            db_session=deps["db_session"],
+            search_space_id=deps["search_space_id"],
+            user_id=deps["user_id"],
+        ),
+        requires=["db_session", "search_space_id", "user_id"],
+    ),
 ]