# Phase 6 — Localization Finalize + Icon + Juice + Store Assets (Design)

**Date:** 2026-06-13
**Status:** Approved (owner approved design 2026-06-13)

## Context

Phases 0–5 are complete (gameplay, seasons, endless, commercial polish, remote
content, Firebase analytics, AdMob + IAP). Phase 6 is the pre-release polish
round. The master plan assumed AI-generated background/tilesheet **images**, but
Phase 3.5 implemented all in-game visuals **procedurally** (CustomPainter glossy
tiles, painted season backgrounds). So image assets are NOT needed for gameplay;
the only image deliverables are the **app icon** and **store graphics**, both of
which are produced as vectors in the game's existing visual language — no
external AI image generation required.

Owner is a non-developer; Claude produces all code and all vector art.

## Visual identity (established, reused here)

- Deep navy background gradient `#101736 → #192555 → #2C3168` (season-1 palette).
- Glossy rounded blocks in four brand colors: pink `#FF7EB3`, yellow `#FFD166`,
  cyan `#6FCDF5`, green `#7EDB9C` (each rendered light→base→dark vertical
  gradient + a soft white highlight ellipse near the top — same look as the
  in-game `paintGlossyTile`).

## Workstreams

### 1. App icon (DECIDED: "Clean 2×2 block mark")

- Composition: rounded-square, deep-navy background, a centered 2×2 grid of the
  four glossy brand-color blocks (pink top-left, yellow top-right, cyan
  bottom-left, green bottom-right). No cherry-blossom accent (icon must be a
  permanent, season-independent brand asset). Mirrors the existing in-app
  `_logoMark`.
- Blocks kept within the central safe zone so Android's circular/rounded mask
  never clips them.
- Deliverables:
  - A master **SVG** committed to the repo (source of truth).
  - A **1024×1024 PNG**, opaque (no alpha) for the iOS App Store.
  - **Android adaptive icon**: foreground = the 2×2 blocks (transparent
    surround), background = the navy gradient (flat or gradient drawable).
  - All platform sizes generated via the `flutter_launcher_icons` package
    (config in `pubspec.yaml` / `flutter_launcher_icons.yaml`), replacing the
    default Flutter icon on both platforms.
- Tooling: rasterize SVG→PNG with a deterministic, scriptable converter
  (`rsvg-convert`, or a tiny Dart/`image` script, or `flutter_svg` render). The
  conversion command is checked in so the icon can be regenerated.

### 2. Localization finalize (EN + KO)

- Audit every user-facing screen for hardcoded (non-l10n) strings; move any to
  ARB. Screens to sweep: splash, season title, home, season map, game (HUD +
  result overlays), settings, tutorial, snackbars.
- Verify EN copy is store-quality and KO copy reads natively (no machine-y
  phrasing).
- **KO integrity pass:** run the app under the `ko` locale on the simulator and
  confirm no text overflow/truncation/clipping on any screen (Korean strings are
  often longer/shorter than English — buttons, chips, result cards, settings
  rows). Fix overflows (wrap, ellipsis, sizing) where found.
- Add any new keys introduced by workstream 3 (sound/haptics toggle labels).

### 3. Juice / polish pass (light, on top of Phase 3.5; BGM stays on hold)

- **Sound on/off setting** (real gap — commercial games need it): a single
  toggle in Settings that enables/disables SFX, persisted in `SaveRepository`
  (additive flag, saveVersion stays 1) and applied through `AudioService`. The
  same flag also gates gameplay haptics (no separate haptics toggle — one
  "Sound & vibration" control keeps Settings simple).
- **Settings screen theming:** the just-added Settings screen is a plain
  `ListView`; give it the game's look (transparent scaffold over
  `SeasonBackground`, themed text/cards) so it matches the rest of the app.
- **Button press feedback:** subtle scale-on-press for the primary buttons
  (home Adventure/Classic, map nodes) for a more tactile "game" feel.
- **Screen transitions:** a gentle shared fade(-through) transition for
  home → map → game navigation instead of the default platform slide.

### 4. Store assets

- **Feature graphic (Play, 1024×500):** navy + glossy blocks + "Block Seasons"
  wordmark + a short tagline, in the icon's visual language. Produced as vector
  → PNG and committed under `docs/store/`.
- **Screenshots:** captured from the running app on the simulator — home,
  season map, gameplay (mid-combo), stage win (stars), endless game-over — in
  **both EN and KO**. Stored under `docs/store/screenshots/<locale>/`.
- Exact per-store framing/sizes (iOS 6.7"/6.5", Play phone) are finalized at
  submission time in **Phase 7**; Phase 6 captures the raw, clean source shots.

## Out of scope (explicit)

- BGM / music (on hold by prior decision).
- AI-generated raster backgrounds/tilesheets (visuals are procedural).
- Real AdMob unit IDs and store IAP product creation (owner prerequisites,
  tracked for the Phase 5 finalize step between Phase 6 and Phase 7).
- Final per-store screenshot framing (Phase 7).

## Success criteria

- Real app icon shows on both iOS and Android (no default Flutter icon).
- KO full play-through has zero text overflow/clipping; no hardcoded strings.
- Sound toggle works and persists across relaunch.
- Feature graphic + EN/KO screenshot set committed under `docs/store/`.
- `flutter analyze` clean; full test suite green (≥169, plus any new tests for
  the sound-setting persistence).
