implement phase 5~7

SPEC.md

@@ -264,7 +264,7 @@ gantt
 | 6   | Map pan/zoom, hover highlight, click-to-connect, color states by availability                |
 | 7   | `config_dialog.rs` modal, full settings flow, apply restarts poller                          |
 | 8   | Unit tests (see below)                                                                       |
-| 9   | Polish pass                                                                                  |
+| 9   | Polish pass: confirmation prompts, status formatting, edge cases, deprecation cleanup        |
 
 ---
 
@@ -280,6 +280,20 @@ gantt
 
 ---
 
+## Phase 9 — Polish Details
+
+- **Confirmation prompts on connect/switch**: connecting takes long enough to feel costly, so clicking
+  a country (list, grid, or map) when already connected should show a small modal or inline prompt
+  ("Switch to X? [Connect] [Cancel]") before issuing the CLI call. Disconnected → connect can proceed
+  immediately.
+- **Deprecated API cleanup**: replace `ctx.screen_rect()` with `content_rect()`, replace
+  `show_tooltip_at_pointer` with `egui::Tooltip`, remove `#![allow(dead_code)]`.
+- **Border stroke scaling**: consider thinning borders at low zoom and thickening at high zoom.
+- **Notification display**: show `self.notification` somewhere visible (inline banner or status bar).
+- **Cursor polish**: grab/grabbing cursor icons on map pan.
+
+---
+
 ## Future Enhancements (out of scope)
 
 - **Flags setup script**: download SVGs from https://github.com/emcrisostomo/flags (public domain,