Add multi-platform support for device builds

[bitxeno]

Why

Device builds were hard-coded to iOS, which meant watchOS, tvOS, and visionOS builds reported the wrong platform in build execution, preflight output, and the follow-up app-path lookup.

Approach

Thread the selected device platform through the existing build pipeline instead of special-casing it in separate call sites. Keep iOS as the default when no platform is provided.

How it works

The tool schema now accepts a device platform enum. The handler maps that value to the corresponding Xcode platform once, then reuses it for the build options, preflight text, pipeline metadata, and the next-step app-path lookup.

Links

• None

[sentry]

Bug: The new platform parameter in build_device is omitted from the public schema, making it inaccessible to users in the default session-aware mode and preventing multi-platform builds.
_{Severity: HIGH}

Suggested Fix

Remove the 'platform' key from the .omit() call on publicSchemaObject in build_device.ts. This will expose the parameter to users in the default mode. The same fix should be applied to get_device_app_path.ts.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent. Verify if this is a real issue. If it is, propose a fix; if not, explain why it's
not valid.

Location: src/mcp/tools/device/build_device.ts#L52

Potential issue: The `platform` parameter, intended for multi-platform device builds, is
added to the `baseSchemaObject` but then explicitly removed from the
`publicSchemaObject` via `.omit()`. In the default session-aware mode, this public
schema is used for validation, which rejects or ignores the `platform` parameter. As a
result, `params.platform` is `undefined`, causing the build to default to iOS regardless
of user intent. This makes the new multi-platform build feature non-functional for users
in the default configuration. The same issue exists in `get_device_app_path`, breaking
the toolchain.

Also affects:

• src/mcp/tools/device/get_device_app_path.ts:48-53

_{Did we get this right? 👍 / 👎 to inform future reviews.}