feat(pwa): installable app (Add to Home Screen) for Android + iOS

- manifest.json (standalone display, theme color, maskable icons 192/512).
- generated square icons + apple-touch-icon (180) from the logo.
- apple-mobile-web-app + theme-color meta in home.html.
- sw.js gets a no-op fetch handler so it meets installability criteria (still
  no caching). static.js serves .json/.webmanifest with correct MIME.
- Installing as a PWA also unlocks Web Push on iOS (Apple requires Add to Home Screen).
Build marker -> pwa1.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

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Sravan

2026-06-24 17:13:01 +05:30

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共修改 7 个文件，包含 31 行新增和 3 行删除

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