refactor: replace canvas.show with canvas.present

docs/ios/spec.md

@@ -119,7 +119,7 @@ Add to `src/gateway/protocol/schema.ts` (and regenerate Swift models):
 
 ### Node command set (canvas)
 These are values for `node.invoke.command`:
-- `canvas.show` / `canvas.hide`
+- `canvas.present` / `canvas.hide`
 - `canvas.navigate` with `{ url }` (loads a URL; use `""` or `"/"` to return to the default canvas/A2UI scaffold)
 - `canvas.eval` with `{ javaScript }`
 - `canvas.snapshot` with `{ maxWidth?, quality?, format? }`

docs/mac/canvas.md

@@ -96,7 +96,7 @@ Related:
 
 `clawdis-mac` exposes Canvas via the control socket. For agent use, prefer `--json` so you can read the structured `CanvasShowResult` (including `status`).
 
-- `clawdis-mac canvas show [--session <key>] [--target <...>] [--x/--y/--width/--height]`
+- `clawdis-mac canvas present [--session <key>] [--target <...>] [--x/--y/--width/--height]`
   - Local targets map into the session directory via the custom scheme (directory targets resolve `index.html|index.htm`).
   - If `/` has no index file, Canvas shows the built-in A2UI shell and returns `status: "a2uiShell"`.
 - `clawdis-mac canvas hide [--session <key>]`

docs/refactor/canvas-a2ui.md

@@ -20,7 +20,7 @@
   - Avoid double-sending actions when the bundled A2UI shell is present (let the shell forward clicks so it can resolve richer context).
   - Intercept `clawdis://…` navigations inside the Canvas WKWebView and route them through `DeepLinkHandler` (no NSWorkspace bounce).
   - `GatewayConnection` auto-starts the local gateway (and retries briefly) when a request fails in `.local` mode, so Canvas actions don’t silently fail if the gateway isn’t running yet.
-  - Fix a crash that made `clawdis-mac canvas show`/`eval` look “hung”:
+  - Fix a crash that made `clawdis-mac canvas present`/`eval` look “hung”:
     - `VoicePushToTalkHotkey`’s NSEvent monitor could call `@MainActor` code off-main, triggering executor checks / EXC_BAD_ACCESS on macOS 26.2.
     - Now it hops back to the main actor before mutating state.
   - Preserve in-page state when closing Canvas (hide the window instead of closing the `WKWebView`).