feat(android): add temporary «Э» launcher icon (pending full rebrand)

Generate the Android launcher/adaptive icons + splashes with capacitor-assets from ui/assets/icon.png (the existing maskable brand mark upscaled 512→1024) as a placeholder until the mandatory single-vector icon rebrand recorded in ANDROID_PLAN.md. The adaptive icon insets the foreground 16.7% into the safe zone; the AndroidManifest is untouched (its icon refs already point at @mipmap).

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

ANDROID_PLAN.md

@@ -68,11 +68,17 @@ Kept current as parts land so a fresh session resumes without re-deriving. Verif
   builds a debug APK that installs and **cold-launches to the Login screen** on the Pixel_10 emulator.
   `svelte-check` 0 errors, `vitest` 584 passed. Build recipe + toolchain gotchas live in
   `.claude/CLAUDE.md` → "Native Android build (Capacitor)".
-  **Remaining sub-item:** owner-supplied launcher icon (`ui/assets/icon.png`) → `pnpm android:assets`.
+  **Launcher icon:** a **temporary** placeholder is in place — `ui/assets/icon.png` (the maskable «Э»
+  brand mark upscaled 512→1024) → `pnpm android:assets` regenerated the Android launcher/adaptive
+  icons + splashes. Superseded by the icon rebrand below.
 - **B–G — pending.**
 
-Open logistics (not code): the launcher icon (above); `~/.claude/bin/gitea-ci-watch.py` must exist
-before the first push/PR; RuStore publication prerequisites gate release only.
+Open logistics (not code): **mandatory icon rebrand (future)** — author ONE vector master and generate
+*every* icon from it (web `favicon.svg` / PWA `icon-*` / maskable, Android adaptive, future iOS). Today
+the formats drift — `favicon.svg` is a rounded bordered tile, `icon-maskable-512.png` a full-bleed
+square, visibly different — and the Android launcher icon is only a temporary upscale of the maskable
+(`capacitor-assets` insets it 16.7% into the adaptive safe zone). `~/.claude/bin/gitea-ci-watch.py` is present.
+RuStore publication prerequisites gate release only.
 
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