feat(mobile): add branch and commit comparison views

Mobile Changes only exposed working-tree edits. Share comparison loading and source pickers with desktop, with phone sheets, tablet popovers, scoped file navigation and retry states.

Keep checkout, Sync and commit controls under Changes. Compact the section and source triggers, center menu items, and preserve repeated file-open requests from chat.

Validated with UI type-check and lint, comparison and navigation tests, web/mobile asset builds, and maintainer app testing.

Co-authored-by: gaojunran <nebula2021@126.com>

packages/ui/src/lib/diff/patchFileDiff.ts

@@ -10,6 +10,9 @@ const PATCH_DIFF_CACHE_LIMIT = 64;
 const DEFAULT_PATCH_CONTEXT_LINES = 3;
 const patchFileDiffCache = new Map<string, FileDiffMetadata>();
 
+export const isBinaryPatch = (patch: string): boolean =>
+  /^Binary files .+ differ$/m.test(patch) || /^GIT binary patch$/m.test(patch);
+
 export const fileDiffFromPatch = (
   file: string,
   patch: string,