Add menu bar and toolbar functionality analysis

README_GUI.md

@@ -136,6 +136,72 @@ nc localhost 8923
 
 ---
 
+## Menu Bar & Toolbar Functionality
+
+### Menu Bar Structure
+
+```
+┌─────────────────────────────────────────────────────────────────┐
+│  [File]  [Controller]  [Language]  [Help]                      │
+├─────────────────────────────────────────────────────────────────┤
+```
+
+#### File Menu
+| Item | Function |
+|------|----------|
+| Exit | Close application |
+| Load Controller List | Load saved controller list |
+| **Language** (submenu) | English / Japanese |
+
+#### Controller Menu
+| Item | Function |
+|------|----------|
+| Manual Add Controller | Manually add a controller |
+| Update System Code | Firmware update |
+| Dump Controller Log | Export controller log |
+| Shutdown | Shutdown controller |
+| **Update** (submenu) | |
+| - Update Expander Code | Update expander firmware |
+| - Update JBOD Code | Update JBOD firmware |
+| - Update Boot Code | Update boot firmware |
+| - Update BIOS/EFI | Update BIOS/EFI |
+| Disk RW Test | Run disk read/write test |
+| Polling On/Off | Toggle polling |
+
+#### Help Menu
+| Item | Function |
+|------|----------|
+| Help Center | Open local help |
+| Play Menu | Debug/testing menu |
+| About | Show About dialog |
+
+### Toolbar Buttons
+
+| Button | Function |
+|--------|----------|
+| **+** (Add) | Add Controller |
+| **-** (Remove) | Remove Controller |
+| **Create Array** | Create new RAID array |
+| **Delete Array** | Delete RAID array |
+| **Mirror** | Mirror configuration |
+| **Email** | Email notification settings |
+| **Settings** | Application preferences |
+| **Advanced** | Advanced operations menu |
+
+### Advanced Menu (frmAdvanced)
+
+| Category | Functions |
+|----------|-----------|
+| **LUN Mask** | LUN masking configuration |
+| **Slicing** | Storage slicing |
+| **Snapshot** | Snapshot management |
+| **Migrate** | Migration operations |
+| **Expansion** | Storage expansion |
+| **Maintenance** | System maintenance |
+| **Email Settings** | Email configuration |
+
+---
+
 ## Java Source Code Architecture (Reference for Migration)
 
 ### 1. System Architecture