Implement immediate transitional service icons with pending state tracking

- Replace timeout-based command status with pending service transitions
- Show immediate directional arrows when pressing service commands (↑ ↓ ↻)
- Track original service status and command type for each pending operation
- Automatically clear transitional icons when real status updates arrive
- Remove unused TerminalPopup and CommandStatus infrastructure
- Simplify visual feedback system using state-based approach

Service commands now provide instant visual feedback that persists until
the actual service state changes, eliminating timing issues and improving UX.

dashboard/src/main.rs

@@ -14,7 +14,7 @@ use app::Dashboard;
 
 /// Get hardcoded version
 fn get_version() -> &'static str {
-    "v0.1.23"
+    "v0.1.24"
 }
 
 /// Check if running inside tmux session