feat: inline permission prompt and improve TUI layout

- Render permission modal inline below log panel instead of floating CenteredModal overlay
- Hide input area when permission prompt is active
- Add dev:debug and dev:debug-brk scripts for Bun inspector debugging
- Add background color to header to prevent content bleeding through
- Add margin spacing between header and log panel
- Change permission modal border to top-only for cleaner inline appearance

src/services/chat-tui/streaming.ts

@@ -98,7 +98,8 @@ const createAgentOptionsWithTUI = (
       metadata: {
         toolName: toolCall.name,
         toolStatus: "running",
-        toolDescription: JSON.stringify(toolCall.arguments),
+        toolDescription: `Executing ${toolCall.name}`,
+        toolArgs: toolCall.arguments,
       },
     });