feat: app icon, name fix, and icon generation script

- scripts/generate_icons.sh: ImageMagick script — dark #09090b bg,
  white B and red R (#ef4444) at the same 480pt size, NotoSans-Bold.
  Generates icon, adaptive foreground, monochrome, and splash variants.
- app.json: name changed to 'Bincio Rec'; adaptive icon backgroundColor
  updated to #09090b; removed redundant backgroundImage

scripts/generate_icons.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+# Generates all icon assets for bincio-rec.
+# Requires ImageMagick (magick / convert).
+# Style mirrors bincio_autarchive: dark background, white B, accent-coloured R.
+
+set -e
+cd "$(dirname "$0")/.."
+
+FONT="$HOME/Library/Fonts/NotoSans-Bold.ttf"
+BG="#09090b"
+WHITE="#ffffff"
+RED="#ef4444"
+
+# ── Main icon (1024×1024) ─────────────────────────────────────────────────────
+magick -size 1024x1024 xc:"$BG" \
+  -font "$FONT" \
+  -pointsize 480 -fill "$WHITE" -gravity NorthWest -annotate +110+295 'B' \
+  -pointsize 480 -fill "$RED"   -gravity NorthWest -annotate +560+295 'R' \
+  assets/icon.png
+
+# ── Android adaptive icon — foreground (transparent bg, design fits safe zone)
+# Safe zone = inner 66% of 1024 = 676 px.
+magick -size 1024x1024 xc:none \
+  -font "$FONT" \
+  -pointsize 340 -fill "$WHITE" -gravity NorthWest -annotate +175+325 'B' \
+  -pointsize 340 -fill "$RED"   -gravity NorthWest -annotate +535+325 'R' \
+  assets/android-icon-foreground.png
+
+# ── Android adaptive icon — monochrome (white on transparent, for themed icons)
+magick -size 1024x1024 xc:none \
+  -font "$FONT" \
+  -pointsize 340 -fill "$WHITE" -gravity NorthWest -annotate +175+325 'B' \
+  -pointsize 340 -fill "$WHITE" -gravity NorthWest -annotate +535+325 'R' \
+  assets/android-icon-monochrome.png
+
+# ── Splash screen icon (512×512) ─────────────────────────────────────────────
+magick -size 512x512 xc:"$BG" \
+  -font "$FONT" \
+  -pointsize 240 -fill "$WHITE" -gravity NorthWest -annotate +55+147 'B' \
+  -pointsize 240 -fill "$RED"   -gravity NorthWest -annotate +280+147 'R' \
+  assets/splash-icon.png
+
+echo "✓ Icon assets generated in assets/"