Add 'r' keybinding to refresh mail message list

PROJECT_PLAN.md

@@ -451,7 +451,7 @@ Implement `/` keybinding for search across all apps with similar UX:
 3. Calendar: Responsive detail panel
 4. Calendar: Sidebar mini-calendar
 5. Calendar: Calendar invites sidebar
-6. Mail: Add refresh keybinding
+6. ~~Mail: Add refresh keybinding~~ (DONE - `r` key)
 7. Mail: Add mark read/unread action
 8. Mail: Folder message counts
 9. ~~Mail: URL compression in markdown view~~ (DONE)

src/mail/app.py

@@ -115,7 +115,8 @@ class EmailViewerApp(App):
         Binding("h", "toggle_header", "Toggle Envelope Header"),
         Binding("t", "create_task", "Create Task"),
         Binding("l", "open_links", "Show Links"),
-        Binding("%", "reload", "Reload message list"),
+        Binding("r", "reload", "Reload message list"),
+        Binding("%", "reload", "Reload message list", show=False),
         Binding("1", "focus_1", "Focus Accounts Panel"),
         Binding("2", "focus_2", "Focus Folders Panel"),
         Binding("3", "focus_3", "Focus Envelopes Panel"),
@@ -912,6 +913,11 @@ class EmailViewerApp(App):
         self.fetch_envelopes() if self.reload_needed else None
         self.show_message(self.message_store.get_newest_id())
 
+    def action_reload(self) -> None:
+        """Reload the message list."""
+        self.fetch_envelopes()
+        self.show_status("Reloading messages...")
+
     def action_search(self) -> None:
         """Open the search panel."""
         search_panel = self.query_one("#search_panel", SearchPanel)