fix(tui): improve macOS paste and shortcut parity

- support Cmd-as-super and readline-style fallback shortcuts on macOS
- add layered clipboard/OSC52 paste handling and immediate image-path attach
- add IDE terminal setup helpers, terminal parity hints, and aligned docs

website/docs/reference/slash-commands.md

@@ -78,9 +78,10 @@ Type `/` in the CLI to open the autocomplete menu. Built-in commands are case-in
 | `/usage` | Show token usage, cost breakdown, and session duration |
 | `/insights` | Show usage insights and analytics (last 30 days) |
 | `/platforms` (alias: `/gateway`) | Show gateway/messaging platform status |
-| `/paste` | Check clipboard for an image and attach it |
+| `/paste` | Attach a clipboard image |
 | `/copy [number]` | Copy the last assistant response to clipboard (or the Nth-from-last with a number). CLI-only. |
 | `/image <path>` | Attach a local image file for your next prompt. |
+| `/terminal-setup [auto\|vscode\|cursor\|windsurf]` | TUI-only: configure local VS Code-family terminal bindings for better multiline + undo/redo parity. |
 | `/debug` | Upload debug report (system info + logs) and get shareable links. Also available in messaging. |
 | `/profile` | Show active profile name and home directory |
 | `/gquota` | Show Google Gemini Code Assist quota usage with progress bars (only available when the `google-gemini-cli` provider is active). |
@@ -157,7 +158,7 @@ The messaging gateway supports the following built-in commands inside Telegram,
 
 ## Notes
 
-- `/skin`, `/tools`, `/toolsets`, `/browser`, `/config`, `/cron`, `/skills`, `/platforms`, `/paste`, `/image`, `/statusbar`, and `/plugins` are **CLI-only** commands.
+- `/skin`, `/tools`, `/toolsets`, `/browser`, `/config`, `/cron`, `/skills`, `/platforms`, `/paste`, `/image`, `/terminal-setup`, `/statusbar`, and `/plugins` are **CLI-only** commands.
 - `/verbose` is **CLI-only by default**, but can be enabled for messaging platforms by setting `display.tool_progress_command: true` in `config.yaml`. When enabled, it cycles the `display.tool_progress` mode and saves to config.
 - `/sethome`, `/update`, `/restart`, `/approve`, `/deny`, and `/commands` are **messaging-only** commands.
 - `/status`, `/background`, `/voice`, `/reload-mcp`, `/rollback`, `/snapshot`, `/debug`, `/fast`, and `/yolo` work in **both** the CLI and the messaging gateway.