Function getToolUiResourceUri

getToolUiResourceUri(
tool: { _meta?: Record<string, unknown> },
): string | undefined
Extract UI resource URI from tool metadata.

Supports both the new nested format (_meta.ui.resourceUri) and the deprecated flat format (_meta["ui/resourceUri"]). The new nested format takes precedence if both are present.
Parameters
- tool: { _meta?: Record<string, unknown> }
  A tool object with optional _meta property
Returns string | undefined
The UI resource URI if valid, undefined if not present
Throws
Error if resourceUri is present but invalid (not starting with "ui://")
Example
```
// New nested format (preferred)
const uri = getToolUiResourceUri({
  _meta: { ui: { resourceUri: "ui://server/app.html" } }
});

// Deprecated flat format (still supported)
const uri = getToolUiResourceUri({
  _meta: { "ui/resourceUri": "ui://server/app.html" }
});
```
- Defined in src/app-bridge.ts:110