fix: handle DataTable RowSelected event for TUI workspace navigation (#43)

* fix: TUI workspace navigation exits and launches claude with plan prompt

When user presses Enter on a workspace in the TUI:
- TUI exits completely (returns WorkspaceInfo)
- Shell executes: cd to workspace, set tab title, activate venv, launch claude
- Tab title derived from beads issue title (truncated to 30 chars)
- Claude launched with 'plan <issue-id>' when purpose contains beads ID
- All user inputs sanitized with shlex.quote() for security

Closes agentspaces-2ln

* fix: handle DataTable RowSelected event for TUI workspace navigation

DataTable with cursor_type="row" consumes Enter key and emits RowSelected
events, which takes precedence over App-level keybindings. Added
on_data_table_row_selected handler to properly capture Enter presses
and delegate to action_navigate().

The App-level binding is retained for footer display purposes.

Author: ckrough

src/agentspaces/ui/app.py

@@ -76,7 +76,8 @@ class WorkspacesTUI(App[WorkspaceInfo | None]):
     BINDINGS: ClassVar[list[Binding]] = [  # type: ignore[assignment]
         Binding("q", "quit", "Quit"),
         Binding("r", "refresh", "Refresh"),
-        Binding("enter", "navigate", "Navigate"),
+        # Enter handled via on_data_table_row_selected; binding kept for footer display
+        Binding("enter", "navigate", "Navigate", show=True),
         Binding("d", "remove", "Remove"),
         Binding("space", "toggle_select", "Select"),
     ]
@@ -162,6 +163,14 @@ def on_data_table_row_highlighted(self, event: DataTable.RowHighlighted) -> None
             preview = self.query_one(PreviewPanel)
             preview.update_preview(workspace)
 
+    def on_data_table_row_selected(self, _event: DataTable.RowSelected) -> None:
+        """Handle row selection (Enter pressed on DataTable).
+
+        DataTable consumes Enter key and emits RowSelected, so we handle
+        navigation here rather than via App-level keybinding.
+        """
+        self.action_navigate()
+
     def action_toggle_select(self) -> None:
         """Toggle selection of current row."""
         table = self.query_one(WorkspaceTable)