CLAUDE.md

@@ -96,7 +96,14 @@ Bromite userscript (isolated world, per-site adapters, localStorage cache)
 5. **UI** — rendered inside a **Shadow DOM** root to isolate from site CSS
    (critical on mobile). Three tabs (All / Favourites / Archived) and a row of
    link chips to the web UI and both manga sites; `WEB_BASE` sits in the CONFIG
-   block next to `API_BASE`.
+   block next to `API_BASE`. The FAB is a `7 × 44` edge tab whose *hit* area is
+   widened to `28 × 72` by an invisible `#hit` child; `#fab` must keep
+   `touch-action: none` and must **not** regain `overflow: hidden`. Because
+   `touch-action` is resolved at gesture start, the strip cannot be both
+   browser-scrolled and script-dragged, so `makeDraggable` splits by intent: a
+   swipe from `#hit` scrolls via `window.scrollBy`, a hold of `ARM_MS` arms a
+   reposition drag, and the visible sliver drags with no hold. See
+   `docs/superpowers/specs/2026-07-28-edge-tab-hitbox-design.md`.
 6. **SPA navigation** — Asura is Astro, client-routed on the comic/chapter pages: patch `history.pushState`/`replaceState` + listen `popstate`, re-run `detect()` on URL change so auto-update fires without reload. Demonic uses classic reloads (initial `document-idle` run suffices).
 
 ### Live URL shapes (verified 2026-07-26, may drift — re-check against live pages before trusting)