Fix sync TUI freeze by completing auth before starting dashboard

src/cli/sync.py

@@ -715,6 +715,24 @@ def sync(
     else:
         # Default: Launch interactive TUI dashboard
         from .sync_dashboard import run_dashboard_sync
+        from src.services.microsoft_graph.auth import has_valid_cached_token
+
+        # Check if we need to authenticate before starting the TUI
+        # This prevents the TUI from appearing to freeze during device flow auth
+        if not demo:
+            scopes = [
+                "https://graph.microsoft.com/Calendars.Read",
+                "https://graph.microsoft.com/Mail.ReadWrite",
+            ]
+            if not has_valid_cached_token(scopes):
+                click.echo("Authentication required. Please complete the login flow...")
+                try:
+                    # This will trigger the device flow auth in the console
+                    get_access_token(scopes)
+                    click.echo("Authentication successful! Starting dashboard...")
+                except Exception as e:
+                    click.echo(f"Authentication failed: {e}")
+                    return
 
         sync_config = {
             "org": org,
@@ -936,6 +954,27 @@ def status():
 def interactive(org, vdir, notify, dry_run, demo):
     """Launch interactive TUI dashboard for sync operations."""
     from .sync_dashboard import run_dashboard_sync
+    from src.services.microsoft_graph.auth import (
+        has_valid_cached_token,
+        get_access_token,
+    )
+
+    # Check if we need to authenticate before starting the TUI
+    # This prevents the TUI from appearing to freeze during device flow auth
+    if not demo:
+        scopes = [
+            "https://graph.microsoft.com/Calendars.Read",
+            "https://graph.microsoft.com/Mail.ReadWrite",
+        ]
+        if not has_valid_cached_token(scopes):
+            click.echo("Authentication required. Please complete the login flow...")
+            try:
+                # This will trigger the device flow auth in the console
+                get_access_token(scopes)
+                click.echo("Authentication successful! Starting dashboard...")
+            except Exception as e:
+                click.echo(f"Authentication failed: {e}")
+                return
 
     sync_config = {
         "org": org,