Fix Linux window controls safe-area patches

[ilysenko]

Summary

• retarget the Linux window-controls safe-area patch to the current app-shell layout bundle
• reserve the native titlebar controls area for right-side app shell actions
• retarget the tooltip collision patch to the current shared tooltip bundle and update drift tests

Fixes #1068

Tests

• node --test scripts/patch-linux-window-ui.test.js --test-name-pattern 'window controls safe-area descriptor|optional webview descriptors|right-side safe area|remaining Linux window controls|remaining Linux header safe-area|keeps tooltips|remaining tooltip|alias drift|thread side panel native tooltip'\n- git diff --check\n- current generated asset descriptor/apply probe for safe-area and tooltip targets\n\n## Notes\n- This targets the latest observed upstream webview chunk split and removes the stale composer-utility-bar selector.