ci(mobile): run mobile checks on desktop xterm source-patch edits

regenerate-xterm-patches-mobile.mjs derives the mobile patch from the desktop
`ColorContrastCache.ts` stanza and `xterm-upstream.json`, so an edit to either
changes what the mobile patch check expects while mobile.yml never triggers.

.github/workflows/mobile.yml

@@ -10,6 +10,11 @@ on:
     paths:
       - 'mobile/**'
       - 'config/scripts/xterm-patch-text*'
+      # Why: regenerate-xterm-patches-mobile.mjs derives the mobile patch from the desktop
+      # contrast stanza and this manifest, so a desktop-only edit moves what the mobile
+      # check expects and must re-run it.
+      - 'config/patches/xterm-src/**'
+      - 'config/patches/xterm-upstream.json'
       # Mobile launch contracts exercise the real host dispatcher and durable receipt store.
       - 'src/main/agent-launch/**'
       - 'src/main/runtime/rpc/**'
@@ -48,6 +53,8 @@ on:
     paths:
       - 'mobile/**'
       - 'config/scripts/xterm-patch-text*'
+      - 'config/patches/xterm-src/**'
+      - 'config/patches/xterm-upstream.json'
       - '.github/workflows/mobile.yml'
 
 concurrency: