Add a resizable Glance launcher widget

[eliotcougar]

Summary

Replace the fixed legacy launcher switch with a horizontally resizable AndroidX Glance widget, using the main screen's server-row styling. Following review feedback, keep it focused on the selected server and service start/stop.

Behavior

• 1x1: unchanged compact tile with the app's V mark and Play/Stop symbol. The whole tile controls the service.
• Every wider size: one line containing the currently selected server name and a Start/Stop button. More width gives the name more space; it does not add controls or information.
• Tapping the server name opens the app, including in the 2x1 layout.

Implementation and cleanup

• Two layouts only: compact and horizontal. Remove the separate wider-size variants, test/restart callbacks, result formatting, status colors, and custom font-scale observer/metrics.
• All Glance components run in the existing daemon process. The widget observes core-owned running state rather than maintaining a persisted running flag.
• The small repository loads the selected profile off the main thread and combines it with live core state. Selecting a different profile updates the displayed name without losing the ability to stop the currently running service.
• Keep storage-owned profile-change notifications and guarded widget updates. Shared app/core connection-testing behavior is unchanged by this simplification.

Validation

• After merging upstream: focused widget/request-ownership tests and all 97 Play Store debug unit tests passed.
• Passed :app:compilePlaystoreDebugKotlin, :app:assemblePlaystoreRelease, and git diff --check.
• Pixel 9 Pro API 37 x86_64 emulator: installed a locally signed release build over the existing app after checking signer compatibility and the three required native libraries.
• Checked 1x1 appearance and Stop, horizontal resizing through 2x1/3x1/4x1, Start/Stop updates, orange/grey bar transitions, and opening the app by tapping the name.
• Checked the single-line 2x1 row at font scale 2.0; text remained vertically centered without overlapping the button. Restored font scale afterward.
• JVM coverage includes missing/blank profiles, profile refresh, stop/recreation state, distinct profile-change/cancellation message IDs, failure containment, and responsive width boundaries including five-column Pixel widths.

[2dust]

非常感谢
widget 只是一个辅助小功能，请不要增加太多的功能。
widget 就是为了快速启动和关闭，其他功能请进入 app 操作。

[eliotcougar]

非常感谢 widget 只是一个辅助小功能，请不要增加太多的功能。 widget 就是为了快速启动和关闭，其他功能请进入 app 操作。

It has only the most used additional actions when it is in 3x1, 4x1 sizes: Test current connection and restart service.
The basic 1x1 layout is a simple start/stop toggle.

It is also part of Compose migration as it uses Compose Glance.

[2dust]

暂时不接受这么多功能的 widget

[eliotcougar]

暂时不接受这么多功能的 widget

How much less functions do you want in a widget?

How about this:
1x1 start/stop widget
Resizable horizontally to show current server and connected/disconnected status. And a simple start/stop button.

Remove test and restart service buttons entirely.

[eliotcougar]

The widget is now very simple.