diff --git a/android/plans/todo.md b/android/plans/todo.md
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--- a/android/plans/todo.md
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@@ -1,120 +0,0 @@
-# Lô tô Android — TODO
-
-## Direction change (2026-05-10)
-
-Repo migrated from **native Kotlin/Compose port** to a **Capacitor wrapper**
-around the upstream `tiennm99/loto` SvelteKit PWA. Native code lives in git
-history at commits `9a35686` and `fe52232` — recoverable but no longer the
-ship target.
-
-Reason: maintenance parity. Loto evolves; the wrapper rebuilds and ships
-without re-porting features.
-
-## Done in 2026-05-10 session
-
-- [x] Migrate to Capacitor wrapper, push to main (commit `dab4f7e`)
-- [x] CI green: Node 22 + JDK 21 (commits `95358f2`, `4fde3f1`) — debug APK 4.9 MB
-- [x] BlueStacks/emulator compat: `<uses-feature required=false>`, WebView debug auto-enabled in debug builds (commit `1ec4863`)
-- [x] Optional Play Store auto-publish wired into `release.yml`, gated on `PLAY_SERVICE_ACCOUNT_JSON` (commit `793f009`)
-
-## P0 — Smoke test on real device
-
-- [x] CI build-debug workflow assembles APK (validated by run `25610204367`)
-- [ ] Sideload the latest artifact onto a real device (API 24, API 31, API 36) and BlueStacks
-- [ ] Smoke test cold start: app loads `https://localhost/`, no white flash > 1s
-- [ ] Smoke test offline: enable airplane mode, kill app, relaunch — must work
-- [ ] Smoke test audio: tap any number → Vietnamese voice plays
-- [ ] Verify both voices switch correctly (`hoai-my` ↔ `nam-minh`)
-
-## P0 — Wrapper-specific concerns
-
-- [ ] First-launch SW registration: confirm Workbox precaches the bundled audio
-      (should be idempotent since assets already on-disk, but verify no errors)
-- [ ] Back button behavior: Capacitor default closes app — decide whether to
-      add `App.addListener('backButton', …)` for in-app history navigation
-- [ ] Safe-area / status-bar inset: SvelteKit UI may render under the status bar.
-      Check; add `<StatusBar>` plugin if needed
-- [ ] Audio focus: WebView `<audio>` doesn't claim AUDIOFOCUS_GAIN. Test what
-      happens when a phone call comes in mid-call (does playback duck/pause?)
-- [ ] Verify `android:supportsRtl="true"` (Capacitor default) doesn't flip the
-      Vietnamese UI
-
-## P1 — Polish before public release
-
-- [ ] Replace placeholder launcher icon (Capacitor ships a generic Material icon).
-      Use loto's existing `static/icons/` rasters; consider `@capacitor/assets`
-      to generate adaptive + splash from a single source
-- [ ] Splash screen: `@capacitor/splash-screen` plugin with brand colors
-- [ ] Status bar styling: brand-colored, light/dark text via `@capacitor/status-bar`
-- [ ] App-store screenshots (3–5 phone shots): cold start, mid-game, master panel,
-      settings, bingo modal
-
-## P1 — Distribution: signing + first GitHub Release
-
-- [ ] Generate release keystore: `keytool -genkey -v -keystore ~/.android/loto-release.jks -keyalg RSA -keysize 4096 -validity 36500 -alias loto`
-- [ ] Add GitHub secrets: `KEYSTORE_BASE64` (= `base64 -w0 loto-release.jks`), `KEYSTORE_PASSWORD`, `KEY_ALIAS`, `KEY_PASSWORD`
-- [ ] Tag `v1.0.0` and push → `release.yml` builds signed AAB+APK, attaches to GH Release
-      (Play Store step skips silently because `PLAY_SERVICE_ACCOUNT_JSON` not yet set)
-
-## P1 — Google Play Store (ordered, do in sequence)
-
-**Phase A — one-time Play Console setup (cannot be automated, ~$25 + 1–7 day review):**
-
-- [ ] Sign up: https://play.google.com/console/signup ($25 one-time fee)
-- [ ] Create app entry with package name `com.miti99.loto` (must match `applicationId`)
-- [ ] Prepare store assets:
-  - [ ] Icon 512×512 PNG
-  - [ ] Feature graphic 1024×500 PNG/JPG
-  - [ ] 2–8 phone screenshots (master panel, player board, settings, bingo modal, cold start)
-  - [ ] Short description ≤ 80 chars
-  - [ ] Full description ≤ 4000 chars (Vietnamese + optional English)
-  - [ ] Privacy policy URL — host on GH Pages even though app is offline (required by Play)
-- [ ] Fill content rating questionnaire (Casino/Card → likely Everyone or Teen)
-- [ ] Fill target audience + data safety form (declare "No data collected" — fully offline)
-- [ ] **Manually upload** the signed AAB from the v1.0.0 GH Release to **Internal Testing track**
-      (Google policy: first upload must be manual; CI auto-publish only works for v1.0.1+)
-- [ ] Submit for review (1–7 days for first app)
-
-**Phase B — enable CI auto-publish (after Phase A approved):**
-
-- [ ] Play Console → Setup → API access → link/create Google Cloud project
-- [ ] In GCP Console: create Service Account → Keys → Add Key → JSON → download
-- [ ] Back in Play Console API access: grant the service account *Release manager* + *View app information*
-      (or *Admin* for simplicity)
-- [ ] Add full JSON content as GH secret `PLAY_SERVICE_ACCOUNT_JSON`
-- [ ] **Bump `versionCode` to 2** in `android/app/build.gradle` before next tag
-      (Play rejects duplicate versionCodes — every release must increment)
-- [ ] Tag `v1.0.1` and push → CI builds + uploads to **Internal track** automatically
-- [ ] Promote internal → closed → open → production via Play Console UI when ready
-      (or change `track: internal` in `release.yml` to `production` to fully automate)
-
-**Open question: versionCode footgun** — every release must increment `versionCode` in
-`android/app/build.gradle` before tagging. Options to consider:
-- Manual discipline (current state)
-- Pre-tag check workflow that fails if `versionCode` wasn't bumped
-- Auto-bump from the git tag (e.g., `v1.0.5` → `versionCode = 5`) as a Gradle plugin or sed step in CI
-
-## P2 — Supply-chain hygiene
-
-- [ ] `npm audit` — wrapper repo (currently 0 vuln)
-- [ ] `npm audit` — loto submodule (currently 2 high — bump and re-pin)
-- [ ] Dependabot / Renovate for both `package.json` and the loto submodule SHA
-
-## P2 — Future features (not committed)
-
-- [ ] Add `@capacitor/share` for sharing the called-numbers card
-- [ ] Add `@capacitor/haptics` for bingo confirmation
-- [ ] Background audio (play numbers while screen off) — WebView audio is
-      foreground-only; would need a native plugin or service shim
-- [ ] iOS target (`npx cap add ios`) — same wrapper, ~zero extra code
-
-## Decisions record
-
-- **Architecture**: Capacitor 8 wrapper, not TWA — chosen for first-launch
-  offline guarantee (TWA needs network for first PWA fetch)
-- **Loto integration**: git submodule pinned to a SHA, not npm package — loto
-  isn't published; submodule keeps the wrapper reproducible
-- **No INTERNET permission**: enforces "fully offline" as a hard guarantee.
-  Add back if any remote feature is introduced
-- **Native port retired**: lives at commits `fe52232`/`9a35686` if someone
-  ever wants the ExoPlayer + Compose UI back
diff --git a/android/plans/260429-1511-loto-upstream-sync/phase-01-confetti-and-celebration.md b/plans/260429-1511-loto-upstream-sync/phase-01-confetti-and-celebration.md
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diff --git a/android/plans/260429-1511-loto-upstream-sync/phase-02-section-cho-ring.md b/plans/260429-1511-loto-upstream-sync/phase-02-section-cho-ring.md
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diff --git a/android/plans/260429-1511-loto-upstream-sync/phase-03-solid-color-palette.md b/plans/260429-1511-loto-upstream-sync/phase-03-solid-color-palette.md
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diff --git a/android/plans/260429-1511-loto-upstream-sync/phase-04-voice-hint-per-mode.md b/plans/260429-1511-loto-upstream-sync/phase-04-voice-hint-per-mode.md
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diff --git a/android/plans/260429-1511-loto-upstream-sync/phase-05-extract-auto-tick.md b/plans/260429-1511-loto-upstream-sync/phase-05-extract-auto-tick.md
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diff --git a/android/plans/260429-1511-loto-upstream-sync/phase-06-tests-and-verification.md b/plans/260429-1511-loto-upstream-sync/phase-06-tests-and-verification.md
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diff --git a/android/plans/260429-1511-loto-upstream-sync/plan.md b/plans/260429-1511-loto-upstream-sync/plan.md
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diff --git a/android/plans/260429-1511-loto-upstream-sync/reports/xia-recon-260429-1511.md b/plans/260429-1511-loto-upstream-sync/reports/xia-recon-260429-1511.md
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diff --git a/plans/260814-1317-android-experience-pass/phase-01-tier1-defects.md b/plans/260814-1317-android-experience-pass/phase-01-tier1-defects.md
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--- a/plans/260814-1317-android-experience-pass/phase-01-tier1-defects.md
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@@ -1,137 +0,0 @@
-# Phase 1 — Tier 1 defects
-
-APK-only bugs. None reproduce in a desktop browser.
-
-## W1 · VIBRATE permission
-
-`android/android/app/src/main/AndroidManifest.xml` — add:
-
-```xml
-<uses-permission android:name="android.permission.VIBRATE" />
-```
-
-Normal permission: no runtime prompt, no Play data-safety change. Caller is
-`PlayerBoard.svelte:341-346`, already guarded by `prefers-reduced-motion`.
-
-## W2 · Screen wake lock
-
-New `web/src/lib/wake-lock.js` (plain `.js` — no reactive state, matches
-`game-logic.js` / `player-auto-cross.js` convention; runes files are only those
-holding `$state`).
-
-API — single entry point so callers cannot desync:
-
-```js
-export function setWakeLock(on)   // idempotent
-export function _resetForTest()   // test-only teardown
-```
-
-Behaviour:
-
-- `setWakeLock(true)` → `navigator.wakeLock.request("screen")`, installs a
-  `visibilitychange` listener that re-acquires on return to visible.
-  Android silently releases the lock whenever the page hides — without the
-  re-acquire the lock is dead after the first backgrounding.
-- `setWakeLock(false)` → releases sentinel, removes listener.
-- Generation token guards the async gap: a `request()` that resolves after the
-  caller flipped to `false` must release immediately rather than leak a lock.
-  Same pattern as `activeToken` in `voice.js`.
-- No `navigator.wakeLock` → no-op (old WebViews at minSdk 24).
-- `request()` rejects on battery saver / hidden page → swallow, do not throw.
-
-Consumer — `web/src/lib/MasterPanel.svelte`, new `$effect`:
-
-```js
-$effect(() => {
-  setWakeLock(autoRunning || hasGame);
-  return () => setWakeLock(false);
-});
-```
-
-`autoRunning` (line 47) and `hasGame` (lines 55-57) already exist locally.
-MasterPanel only mounts in master/both mode, so player-only mode never holds a
-lock — intended: player taps keep their own screen awake.
-
-Tests — new `web/src/lib/wake-lock.test.js`: acquire, release, re-acquire on
-`visibilitychange`, no-op when unsupported, late-resolve after `false` releases.
-
-## W3 · Back button
-
-### Web half — `web/src/lib/overlay-history.js` (new)
-
-Each open overlay pushes one sentinel history entry. `popstate` closes the
-newest. Works in the browser too — browser back closes the modal, a real PWA win.
-
-```js
-export function pushOverlay(close)  // returns dispose() for programmatic close
-```
-
-- LIFO stack of `{ id, close }`.
-- `popstate` → pop top, run its `close()`, leave history alone.
-- `dispose()` (Escape / Xong / backdrop) → remove entry, then `history.back()`
-  to drop the sentinel, with a suppression counter so the resulting `popstate`
-  does not re-run `close()`.
-- Single shared `popstate` listener, installed on first push, removed when the
-  stack empties.
-
-Consumers:
-
-- `PlayerBoard.svelte` — `showCongrats` modal.
-- `SettingsButton.svelte` — settings sheet.
-
-Both already have Escape handlers in an `$effect`; the overlay push belongs in
-the same effect so open/close stays one code path.
-
-Tests — new `web/src/lib/overlay-history.test.js`: single open/close, nested
-LIFO ordering, programmatic close does not double-fire, stack drains.
-
-### Native half — `MainActivity.java`
-
-```java
-getOnBackPressedDispatcher().addCallback(this, new OnBackPressedCallback(true) {
-  @Override public void handleOnBackPressed() {
-    WebView wv = getBridge().getWebView();
-    if (wv != null && wv.canGoBack()) { wv.goBack(); return; }   // pops a sentinel
-    confirmExit();
-  }
-});
-```
-
-`history.pushState` adds to the WebView back-forward list, so `canGoBack()` is
-true exactly while an overlay is open, and `goBack()` fires `popstate`.
-
-Exit confirm: `androidx.appcompat.app.AlertDialog`, strings from
-`strings.xml` (`exit_title`, `exit_message`, `exit_confirm`, `exit_cancel`),
-positive button → `finish()`.
-
-Also add `android:enableOnBackInvokedCallback="true"` to `<application>`.
-Default at targetSdk 36; explicit is self-documenting.
-
-**Unconfirmed, device-only:** whether the activity theme at dialog time is
-AppCompat-derived. Activity theme is `AppTheme.NoActionBarLaunch`
-(parent `Theme.SplashScreen`); Capacitor's splash flow normally swaps to
-`AppTheme.NoActionBar` post-splash. If the dialog throws on a non-AppCompat
-theme, pass an explicit dialog theme to the builder. Flagged in QA checklist.
-
-## Files
-
-| File | Change |
-|------|--------|
-| `android/android/app/src/main/AndroidManifest.xml` | VIBRATE, enableOnBackInvokedCallback |
-| `android/android/app/src/main/java/com/miti99/loto/MainActivity.java` | back callback + confirm dialog |
-| `android/android/app/src/main/res/values/strings.xml` | 4 exit-dialog strings |
-| `web/src/lib/wake-lock.js` | new |
-| `web/src/lib/wake-lock.test.js` | new |
-| `web/src/lib/overlay-history.js` | new |
-| `web/src/lib/overlay-history.test.js` | new |
-| `web/src/lib/MasterPanel.svelte` | wake-lock effect |
-| `web/src/lib/PlayerBoard.svelte` | overlay push for bingo modal |
-| `web/src/lib/SettingsButton.svelte` | overlay push for settings sheet |
-
-## Validation
-
-- `pnpm test` — new suites green, existing 6 suites unaffected.
-- `pnpm lint`, `pnpm build`.
-- Device QA: tap buzzes; reduced-motion silent; 3-min auto-call, screen stays
-  lit; background/return keeps it lit; back closes modal; back at root confirms;
-  confirm dialog renders (theme check).
diff --git a/plans/260814-1317-android-experience-pass/phase-02-tier2-defensive.md b/plans/260814-1317-android-experience-pass/phase-02-tier2-defensive.md
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--- a/plans/260814-1317-android-experience-pass/phase-02-tier2-defensive.md
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@@ -1,132 +0,0 @@
-# Phase 2 — Tier 2, designed defensively
-
-Suspected but unconfirmed without a device. Every change here is correct whether
-or not the bug reproduces, and costs nothing if it does not.
-
-## W4 · Safe-area insets
-
-`web/src/app.html` — viewport meta gains `viewport-fit=cover`:
-
-```html
-<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover" />
-```
-
-`web/src/app.css` — pad `body` by the insets:
-
-```css
-body {
-  padding-top: env(safe-area-inset-top);
-  padding-right: env(safe-area-inset-right);
-  padding-bottom: env(safe-area-inset-bottom);
-  padding-left: env(safe-area-inset-left);
-}
-```
-
-Why `body` and not the page container: `html` carries the background colour and
-`body` is already `transparent` + `min-h-full flex flex-col`, so padding here
-insets content while the background stays full-bleed. `fixed inset-0` overlays
-(bingo modal, settings sheet, inactive-tab curtain) are viewport-relative and
-deliberately unaffected — their backdrops should cover the whole screen; their
-content is centred and already clear of the bars.
-
-Bonus: fixes the iOS PWA notch for free.
-
-Zero effect where insets are 0 (desktop, older Android).
-
-## W5 · Font scale
-
-### Native pin
-
-`MainActivity.java`, after `super.onCreate`:
-
-```java
-getBridge().getWebView().getSettings().setTextZoom(100);
-```
-
-Stops the system font multiplier from breaking a 9-column fixed grid.
-
-### In-app replacement control
-
-Taking the system control away obliges giving one back. Both ship or neither.
-
-`web/src/lib/settings-store.svelte.js`:
-
-- `boardTextScale: 1` in `DEFAULT_SETTINGS`.
-- `validBoardTextScale(v)` — allowlist `[0.9, 1, 1.15, 1.3]`, same
-  per-key-validator pattern as the existing keys.
-- `applyBoardTextScale()` sets `--board-text-scale` on `documentElement`,
-  mirroring `applyEmptyCellColor()`; called from `applyAll()`.
-- Wire into `loadSettings()` and `resetSettings()`.
-
-`web/src/app.css` — new classes. `.tan-tan-num` sets font-family/weight only;
-sizes come from Tailwind utilities on the elements, so overriding there would be
-a specificity fight. Dedicated classes instead, replacing the utilities:
-
-```css
-/* Player card cell — was text-xl sm:text-2xl md:text-3xl */
-.board-num { font-size: calc(1.25rem * var(--board-text-scale, 1)); }
-@media (min-width: 640px) { .board-num { font-size: calc(1.5rem * var(--board-text-scale, 1)); } }
-@media (min-width: 768px) { .board-num { font-size: calc(1.875rem * var(--board-text-scale, 1)); } }
-
-/* Master tracking token — was text-xl sm:text-2xl */
-.master-num { font-size: calc(1.25rem * var(--board-text-scale, 1)); }
-@media (min-width: 640px) { .master-num { font-size: calc(1.5rem * var(--board-text-scale, 1)); } }
-```
-
-Two classes, not one: the master board has two breakpoint rungs, the player card
-three. Merging them would silently enlarge the master board on desktop.
-
-Consumers:
-
-- `PlayerBoard.svelte:451-462` — swap `text-xl sm:text-2xl md:text-3xl` → `board-num`.
-- `MasterPanel.svelte:287` — swap `text-xl sm:text-2xl` → `master-num`.
-
-Scope: grid cells only. Master hero number, called-history chips, and all UI
-chrome keep their Tailwind sizes — clipping is a grid problem.
-
-### Settings UI
-
-`web/src/lib/SettingsButton.svelte` — new fieldset "Cỡ chữ bảng", 4 buttons
-(Nhỏ / Vừa / Lớn / Rất lớn), same `aria-pressed` button-group pattern as the
-existing theme/mode pickers.
-
-Tests — extend `web/src/lib/settings-store.test.js`: default, valid values
-persist, invalid/out-of-set falls back to 1, reset restores 1.
-
-## W6 · Volume rocker → media stream
-
-`MainActivity.java`:
-
-```java
-setVolumeControlStream(AudioManager.STREAM_MUSIC);
-```
-
-One line. Volume keys adjust media rather than ringtone even before first
-playback. Unambiguously right for an app whose job is calling numbers aloud.
-
-## Deferred — audio focus / MediaSession
-
-Still unconfirmed as broken. Building a MediaSession layer around 1-second clips
-for a hypothetical problem is speculative work. Revisit with device evidence.
-
-## Files
-
-| File | Change |
-|------|--------|
-| `web/src/app.html` | `viewport-fit=cover` |
-| `web/src/app.css` | safe-area body padding, `.board-num`, `.master-num` |
-| `web/src/lib/settings-store.svelte.js` | `boardTextScale` + validator + apply |
-| `web/src/lib/settings-store.test.js` | coverage for the new key |
-| `web/src/lib/SettingsButton.svelte` | size picker fieldset |
-| `web/src/lib/PlayerBoard.svelte` | `board-num` class swap |
-| `web/src/lib/MasterPanel.svelte` | `master-num` class swap |
-| `android/.../MainActivity.java` | textZoom pin, volume stream |
-
-## Validation
-
-- `pnpm test` — settings-store suite covers the new key; existing 369 lines of
-  settings tests must stay green (this file has the most regression surface).
-- `pnpm lint`, `pnpm build`.
-- Device QA: system font at 200% → grid intact; in-app size control changes
-  numbers and survives reload; gesture-nav and status bar clear of gear/footer;
-  volume rocker shows the media slider during a call.
diff --git a/plans/260814-1317-android-experience-pass/phase-03-store-polish.md b/plans/260814-1317-android-experience-pass/phase-03-store-polish.md
deleted file mode 100644
index 347306b..0000000
--- a/plans/260814-1317-android-experience-pass/phase-03-store-polish.md
+++ /dev/null
@@ -1,82 +0,0 @@
-# Phase 3 — Store polish
-
-Independent of phases 1-2. Pure config/resource work.
-
-## Launcher name
-
-`android/android/app/src/main/res/values/strings.xml`:
-
-- `app_name`: `Lo To` → `Lô tô`
-- `title_activity_main`: `Lo To` → `Lô tô`
-
-Vietnamese users currently get an ASCII-mangled launcher label while the app
-itself is "Lô tô — Hội chợ TN1". Short form matches the webmanifest
-`short_name`. AAPT handles UTF-8; the file already declares
-`encoding='utf-8'`.
-
-Leave `package_name` and `custom_url_scheme` alone — identifiers, not labels.
-
-## Themed icon (Android 13+)
-
-`android/android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml` — add a
-`<monochrome>` layer so the launcher can tint the icon to the user's theme.
-Without it Android 13+ falls back to the full-colour icon on themed home
-screens.
-
-Source glyph: `web/static/icons/source.svg`. Monochrome layers must be a flat
-silhouette on transparent — no gradients, no background plate. Add as
-`res/drawable/ic_launcher_monochrome.xml` (vector) reusing the existing
-foreground geometry.
-
-## Dark splash
-
-New `android/android/app/src/main/res/values-night/styles.xml` overriding
-`AppTheme.NoActionBarLaunch` with a dark splash drawable. The app has a full
-dark theme; the splash currently flashes light before the WebView paints.
-
-Needs a `drawable-night/splash.xml` (or a night colour the existing
-`@drawable/splash` references).
-
-## Version bump
-
-`android/android/app/build.gradle`:
-
-- `versionCode 3` → `4` (Play rejects duplicates — already documented in
-  `android/README.md`).
-- `versionName "0.0.3"` → `"0.1.0"`. Still internal track; 1.0.0 would
-  overclaim.
-
-## Docs
-
-`android/README.md`:
-
-- Permissions: document VIBRATE and why (haptic cell feedback).
-- New "Back button" note: closes overlays, confirms exit at root.
-- New "Screen wake lock" note: held while a round is active.
-- Version-bump section: reflect the new numbers.
-- **Leave the "Why no INTERNET permission?" section verbatim.** The offline
-  guarantee is unchanged and the wording is deliberate.
-
-## Reassessed, no change
-
-`allowBackup=true` was listed as a gap in the brainstorm. Stored data is grid,
-crossed cells, and UI settings in localStorage — nothing sensitive, and backup
-means a player restores their card on a new phone. Correct as-is.
-
-## Files
-
-| File | Change |
-|------|--------|
-| `android/.../res/values/strings.xml` | diacritic app name |
-| `android/.../res/mipmap-anydpi-v26/ic_launcher.xml` | monochrome layer |
-| `android/.../res/drawable/ic_launcher_monochrome.xml` | new |
-| `android/.../res/values-night/styles.xml` | new, dark splash |
-| `android/.../res/drawable-night/splash.xml` | new |
-| `android/android/app/build.gradle` | versionCode 4, versionName 0.1.0 |
-| `android/README.md` | permissions, back button, wake lock, versions |
-
-## Validation
-
-- No test surface — resources and docs only.
-- Device QA: launcher shows `Lô tô`; themed-icon home screen tints correctly;
-  cold start in dark mode does not flash light.
diff --git a/plans/260814-1317-android-experience-pass/plan.md b/plans/260814-1317-android-experience-pass/plan.md
deleted file mode 100644
index be605dc..0000000
--- a/plans/260814-1317-android-experience-pass/plan.md
+++ /dev/null
@@ -1,82 +0,0 @@
----
-status: complete
-created: 2026-08-14
-completed: 2026-08-14
-branch: main
-source: plans/reports/brainstorm-android-ux-260814-1004-android-experience-pass-report.md
-report: plans/reports/from-cook-to-review-260814-1317-android-experience-pass-implementation-report.md
----
-
-## Deviations from plan
-
-1. **Icon scope grew.** Discovered mid-plan that the APK ships Capacitor's
-   stock logo as launcher icon *and* splash. User approved regenerating from
-   `source.svg`. Supersedes the originally-planned monochrome-layer and
-   dark-splash items, which would have themed the wrong logo.
-2. **`source.svg` is broken.** `font-size="240"` overflows the 512 canvas;
-   `web/static/icons/*.png` are visibly clipped. Android art rendered at a
-   corrected 200/160. Web PWA icons still carry the bug — not fixed, out of
-   approved scope.
-3. **Wake-lock condition tightened** from `autoRunning || hasGame` to
-   `masterState.remaining.length > 0`. `hasGame` never returns to false once a
-   round starts, which would have pinned the screen on for a finished board.
-4. **Splash rebuilt rather than duplicated.** 11 density PNGs replaced by one
-   layer-list + night variant + `windowSplashScreen*` for API 31+.
-
-# Android experience pass
-
-Close Android-only behaviour gaps in the Capacitor wrapper. Offline guarantee
-(no INTERNET permission) untouched.
-
-## Phases
-
-| # | Phase | File | Depends on |
-|---|-------|------|------------|
-| 1 | Tier 1 defects | [phase-01-tier1-defects.md](phase-01-tier1-defects.md) | — |
-| 2 | Tier 2 defensive | [phase-02-tier2-defensive.md](phase-02-tier2-defensive.md) | 1 (shares MainActivity) |
-| 3 | Store polish | [phase-03-store-polish.md](phase-03-store-polish.md) | — |
-
-## Resolved before planning
-
-Brainstorm left W3 (back button) as a fork. Resolved by research:
-
-- Android 16 / API 36 no longer calls `onBackPressed()` and no longer dispatches
-  `KEYCODE_BACK`. Project targets 36.
-- `OnBackPressedCallback` is the forward-compatible mechanism and keeps working
-  under predictive back.
-- Capacitor 8 `BridgeActivity`/`Bridge` show no back handling on `main`, so
-  Capacitor's default "back navigates WebView history" cannot be assumed to
-  survive targetSdk 36 either.
-
-Consequence: back handling is implemented natively via `OnBackPressedCallback`.
-This is not a fallback — it is the only mechanism that can be relied on. Kills
-brainstorm risks 1 and 3 (`web/` never takes a Capacitor dependency).
-
-## Acceptance criteria
-
-1. Cell tap vibrates on device; `prefers-reduced-motion` still suppresses.
-2. Auto-call runs 3+ min untouched without screen dimming; stop releases lock;
-   background → foreground re-acquires.
-3. Back closes an open overlay (bingo modal, settings sheet) instead of quitting;
-   back at root shows a Vietnamese exit confirm.
-4. Player grid legible at 200% system font; in-app board-size control resizes and
-   persists.
-5. Status bar / gesture nav do not overlap the settings gear or footer.
-6. Volume rocker controls media stream during a call.
-7. Launcher shows `Lô tô` with diacritics.
-8. `pnpm test` green, `pnpm lint` clean, `pnpm build` succeeds.
-
-## Out of scope
-
-Multi-device sync, INTERNET permission, audio focus/MediaSession, APK size,
-`allowBackup` changes, service-worker asset dedup.
-
-## Verification limits
-
-No Android device, emulator, or browser in this environment (headless ARM64, no
-Chrome — see workspace CLAUDE.md). Gradle/Android SDK not installed. So:
-
-- Verifiable here: unit tests, lint, web build, static review of native code.
-- Device-only: items 1, 2 (real screen), 3, 4 (system font), 5, 6.
-
-Phase files carry a manual QA checklist for the device-only items.
diff --git a/android/plans/reports/260721-1328-shared-android-signing-key.md b/plans/reports/260721-1328-shared-android-signing-key.md
similarity index 100%
rename from android/plans/reports/260721-1328-shared-android-signing-key.md
rename to plans/reports/260721-1328-shared-android-signing-key.md
diff --git a/plans/reports/brainstorm-android-ux-260814-1004-android-experience-pass-report.md b/plans/reports/brainstorm-android-ux-260814-1004-android-experience-pass-report.md
deleted file mode 100644
index f3e6002..0000000
--- a/plans/reports/brainstorm-android-ux-260814-1004-android-experience-pass-report.md
+++ /dev/null
@@ -1,205 +0,0 @@
-# Brainstorm — Android experience pass
-
-- Date: 2026-08-14
-- Branch: `main` (c6c839f)
-- Mode: brainstorm (no `--html`, no `--wiki`)
-- Status: design approved, ready for `/ck:plan`
-
-## Problem statement
-
-App ships two targets from one commit: static web (`web/`) and a Capacitor 8 APK
-(`android/`). Wrapper is thin — bare `BridgeActivity`, zero plugins, no native code.
-Consequence: several behaviours diverge between browser and APK, and none of the
-divergences reproduce on desktop where development happens.
-
-Goal: close the Android-only gaps without breaking the offline guarantee.
-
-## Locked constraints
-
-| Constraint | Decision |
-|---|---|
-| INTERNET permission | Never. Non-negotiable. Offline is a hard guarantee, not a convention. |
-| Implementation bias | Web-first. Native only where the web platform cannot reach. |
-| Multi-device sync | Out of scope this round. |
-| Play data safety | Must stay "no data collected". |
-
-## Findings (verified against source)
-
-### Tier 1 — defects that exist only in the APK
-
-1. **Haptics dead.** `PlayerBoard.svelte:341-346` calls `navigator.vibrate(10)`.
-   `AndroidManifest.xml` declares no `android.permission.VIBRATE`. Works in Chrome
-   (Chrome holds the permission), silent no-op in the WebView.
-2. **Screen sleeps mid-round.** Auto-call is `setInterval` at 1–10 s/number
-   (`MasterPanel.svelte:85-104`); a 90-number round is 7.5–15 min. Zero wake-lock
-   usage anywhere (grepped). Caller device dims, timers throttle, calls stop.
-   Worst real-world failure; invisible on desktop.
-3. **Back button exits instantly.** Bare `BridgeActivity` + single-route SPA = no
-   history, so back quits. Bingo modal and settings close on Escape
-   (`PlayerBoard.svelte:218-226`) but not on back. State survives in localStorage;
-   an in-flight auto-call run does not.
-
-### Tier 2 — suspected, no device available to confirm
-
-4. **Edge-to-edge collision.** targetSdk 36 → Android 15+ forces edge-to-edge.
-   No `viewport-fit=cover` in `app.html`, no `env(safe-area-inset-*)` in CSS.
-   Settings gear is absolutely positioned at header `top: 0`.
-5. **System font scale breaks the grid.** WebView honours system font size. Board is
-   9 fixed columns, `text-xl…text-3xl` in `aspect-[3/4]` cells. Audience skews toward
-   users who enlarge system fonts. Note: unconfirmed whether container-relative units
-   (`cqw`/`clamp`) survive Android's `textZoom` multiplier — likely not.
-6. **Audio focus.** `new Audio()` in WebView may not take Android audio focus;
-   other apps' audio would play over number calls. Not confirmed broken.
-
-### Tier 3 — product, deferred by decision
-
-7. **Every phone is an island.** `active-tab.svelte.js` is explicitly a same-origin
-   same-device coordinator. Real lô tô = one caller, many players. Cross-device sync
-   is the single largest available UX win and is blocked by the offline vow.
-   Owner kept the vow; sync stays out.
-
-### Checked and dismissed
-
-- **APK bloat** — audio totals 2.2 MB across both voices. Non-issue.
-- **Service-worker asset duplication** — SW re-caches ~2 MB already on disk in the
-  APK. Real but not worth engineering time.
-- **`allowBackup=true`** — stored data is grid, crossed cells, UI settings. Nothing
-  sensitive; backup lets a player restore their card on a new phone. Correct as-is.
-
-## Decisions
-
-| Question | Options weighed | Chosen | Why |
-|---|---|---|---|
-| Scope | Tier 1 / Tier 2 / Tier 3 / store polish | Tier 1 + Tier 2 + polish | Tier 3 blocked by offline vow |
-| Offline vow | keep / LAN-only / server | Keep, non-negotiable | Owner decision |
-| Native code | web-only / web-first / native-free | Web-first, native where forced | Keeps wrapper thin, PWA benefits |
-| Back button | silent exit / confirm / double-back | Close overlays, confirm exit | Losing a live round warrants one first-party plugin |
-| Font scale | pin only / pin + setting / CSS only / defer | Pin `textZoom` + in-app size control | Only option that fixes grid without removing a11y |
-| Wake lock | always / active round / toggle | While round active | Caller device sits untouched; player taps self-serve |
-| Tier 2 verification | defensive / wait / checklist | Design defensively | Fixes are correct regardless, cost nothing if bug absent |
-
-## Work items
-
-### Phase 1 — Tier 1 (no device needed)
-
-**W1 · VIBRATE permission.** Add `<uses-permission android:name="android.permission.VIBRATE" />`
-to `android/android/app/src/main/AndroidManifest.xml`. Normal permission, no runtime
-prompt, no data-safety change. Existing reduced-motion guard unaffected.
-*Accept:* cell tap buzzes on device; reduced-motion still silent.
-
-**W2 · Wake lock.** New `web/src/lib/wake-lock.svelte.js` wrapping
-`navigator.wakeLock.request("screen")`. Must re-acquire on `visibilitychange` —
-Android auto-releases when the page hides. Consumed by `$effect` in
-`MasterPanel.svelte` keyed on `autoRunning || hasGame` (both already local, lines
-47/55-57). No-ops when `navigator.wakeLock` absent (old WebView, minSdk 24).
-*Accept:* 3+ min auto-call untouched, screen stays lit; stop releases; background →
-foreground re-acquires.
-
-**W3 · Back button.**
-- Web half: new `web/src/lib/overlay-history.js`. Overlay open pushes history entry;
-  single `popstate` listener closes topmost. Careful case: close via button/Escape
-  must pop the sentinel without re-triggering close. Touches `PlayerBoard.svelte`
-  (`showCongrats`) and `SettingsButton.svelte`.
-- Native half (exit guard): **unresolved fork.** targetSdk 36 enables predictive back
-  by default and ignores legacy `onBackPressed` interception. Verify whether
-  Capacitor 8 `App.addListener('backButton')` still fires before writing code.
-  Fallback: AndroidX `OnBackPressedCallback` in `MainActivity.java` + Vietnamese
-  confirm dialog from `strings.xml`. Fallback also avoids giving `web/` a Capacitor
-  dependency.
-
-*Accept:* back closes an open modal rather than quitting; back at root during a live
-round asks first.
-
-### Phase 2 — Tier 2, defensive
-
-**W4 · Safe areas.** `viewport-fit=cover` in `web/src/app.html`;
-`env(safe-area-inset-*)` padding in `app.css` / `+page.svelte` container.
-Also fixes iOS PWA notch.
-*Accept:* gear + footer fully visible on Android 15/16 with gesture nav.
-
-**W5 · Font scale.** `MainActivity.java` pins `textZoom = 100`. Paired with new
-`boardTextScale` setting (0.9 / 1.0 / 1.15 / 1.3) in `settings-store.svelte.js`,
-own validator following the existing per-key pattern, UI in the settings sheet,
-drives a CSS var multiplier on `.tan-tan-num`.
-*Accept:* grid intact at 200% system font; in-app control resizes numbers; persists
-across reload.
-
-**W6 · Volume rocker.** `setVolumeControlStream(STREAM_MUSIC)` in `MainActivity.java`.
-One line, unambiguously correct for an audio-centric app.
-
-**Deferred: audio focus / MediaSession.** Unconfirmed problem. Building a MediaSession
-layer around 1-second clips speculatively violates YAGNI. Revisit with device evidence.
-
-### Phase 3 — Store polish
-
-- `strings.xml`: `app_name` → `Lô tô` (diacritics). Currently ASCII-mangled `Lo To`
-  in the launcher while the app itself is "Lô tô — Hội chợ TN1".
-- Monochrome layer in `mipmap-anydpi-v26/ic_launcher.xml` (Android 13+ themed icons),
-  derived from `web/static/icons/source.svg`.
-- `values-night/styles.xml` — dark splash. App has a full dark theme; splash flashes light.
-- `versionCode` + `versionName` bump per existing documented process. Suggest 0.1.0,
-  not 1.0.0 — still internal track.
-- `android/README.md`: document VIBRATE, wake lock, back-button behaviour. Leave the
-  "no INTERNET permission" section verbatim.
-
-## Touchpoints
-
-| File | Work |
-|---|---|
-| `android/android/app/src/main/AndroidManifest.xml` | W1 |
-| `android/android/app/src/main/java/com/miti99/loto/MainActivity.java` | W3 (fallback), W5, W6 |
-| `android/android/app/src/main/res/values/strings.xml` | W3 (dialog strings), P3 |
-| `android/android/app/src/main/res/values-night/styles.xml` | P3 (new) |
-| `android/android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml` | P3 |
-| `android/android/app/build.gradle` | P3 version bump |
-| `web/src/lib/wake-lock.svelte.js` | W2 (new) |
-| `web/src/lib/overlay-history.js` | W3 (new) |
-| `web/src/lib/MasterPanel.svelte` | W2 |
-| `web/src/lib/PlayerBoard.svelte` | W3 |
-| `web/src/lib/SettingsButton.svelte` | W3, W5 |
-| `web/src/lib/settings-store.svelte.js` | W5 |
-| `web/src/app.html` | W4 |
-| `web/src/app.css` | W4, W5 |
-| `android/README.md` | P3 docs |
-
-## Risks
-
-1. **Predictive back vs Capacitor 8** (W3) — resolve before implementation; fallback
-   identified. Highest-uncertainty item in the plan.
-2. **`textZoom` pin overrides accessibility** — mitigated only by W5's in-app control.
-   They ship together or not at all; cutting the setting means cutting the pin.
-3. **`web/` gaining a Capacitor dependency** — if the exit guard uses `@capacitor/app`,
-   the standalone GH Pages build inherits it. Native fallback avoids this.
-4. **No device in the working environment** — W4/W5 designed on reasoning, not
-   observation. Both safe-by-default; harmless if the bug does not reproduce.
-
-## Validation
-
-- `cd web && pnpm test` — settings-store gains `boardTextScale` validator coverage.
-- New unit coverage: `overlay-history` push/pop/dismiss ordering; `wake-lock`
-  re-acquire on visibility change.
-- Manual on Android 15/16 device: haptics, 3-min auto-call with screen untouched,
-  back from modal, back at root mid-round, system font at 200%, gesture-nav insets,
-  volume rocker during a call.
-- `cd android && npm run build && npm run assemble:debug` must stay green.
-
-## Out of scope
-
-Multi-device sync, INTERNET permission, audio focus/MediaSession, APK size,
-`allowBackup` changes, service-worker asset dedup.
-
-## Open questions
-
-1. W3 native path — Capacitor 8 `backButton` under predictive back: fires or not?
-   Decides whether `web/` takes a Capacitor dependency.
-2. Confirm-on-exit trigger — only when a round is live (needs the flag plumbed to
-   native), or unconditionally at root (simpler, mildly noisier)?
-3. `boardTextScale` steps — are 0.9/1.0/1.15/1.3 the right rungs, or is a continuous
-   slider preferred alongside the existing colour picker?
-
-## Next step
-
-`/ck:plan` with this report as input. Default mode recommended over `--tdd`: work is
-mostly additive across new modules and native config, not a refactor of covered
-behaviour. Exception — W5 touches `settings-store.svelte.js`, which has 369 lines of
-existing tests worth preserving.
diff --git a/android/plans/reports/code-reviewer-260429-1554-upstream-sync.md b/plans/reports/code-reviewer-260429-1554-upstream-sync.md
similarity index 100%
rename from android/plans/reports/code-reviewer-260429-1554-upstream-sync.md
rename to plans/reports/code-reviewer-260429-1554-upstream-sync.md
diff --git a/plans/reports/from-cook-to-review-260814-1317-android-experience-pass-implementation-report.md b/plans/reports/from-cook-to-review-260814-1317-android-experience-pass-implementation-report.md
deleted file mode 100644
index 69e0e11..0000000
--- a/plans/reports/from-cook-to-review-260814-1317-android-experience-pass-implementation-report.md
+++ /dev/null
@@ -1,131 +0,0 @@
-# Android experience pass — implementation report
-
-- Date: 2026-08-14
-- Branch: `main` (uncommitted)
-- Plan: [plans/260814-1317-android-experience-pass/plan.md](../260814-1317-android-experience-pass/plan.md)
-- Brainstorm: [brainstorm-android-ux-260814-1004](brainstorm-android-ux-260814-1004-android-experience-pass-report.md)
-
-## Verified here
-
-| Gate | Result |
-|------|--------|
-| `pnpm test` | 8 files, 121 tests pass (was 6 files / 105) |
-| `pnpm lint` | clean |
-| `pnpm build` | succeeds; `viewport-fit`, safe-area CSS, `.board-num`/`.master-num`, `--board-text-scale` confirmed present in output |
-
-## NOT verified — no device, emulator, browser, or Android SDK
-
-Gradle cannot run here (`ANDROID_HOME` unset, no SDK, no `adb`). **The Java and
-all Android resources are uncompiled.** Static review only.
-
-Device QA required for: haptics, wake lock, back button + exit dialog, safe-area
-insets, system font scale, volume rocker, launcher icon, splash.
-
-## Delivered
-
-### Phase 1 — Tier 1 defects
-
-- **W1 VIBRATE** — `AndroidManifest.xml`. Normal permission; no runtime prompt,
-  no data-safety change.
-- **W2 wake lock** — new `web/src/lib/wake-lock.js` + 8 tests. Re-acquires on
-  `visibilitychange` (Android drops the lock on hide). Generation token stops a
-  late-resolving `request()` leaking a lock after the caller turned it off.
-  Consumed by a `$effect` in `MasterPanel.svelte`.
-- **W3 back button** — native `OnBackPressedCallback` in `MainActivity.java` +
-  new `web/src/lib/overlay-history.js` (8 tests). Overlays push a history
-  sentinel; `canGoBack()` therefore means "an overlay is open". Root back shows
-  a Vietnamese confirm dialog.
-
-### Phase 2 — Tier 2, defensive
-
-- **W4 safe areas** — `viewport-fit=cover` + `env(safe-area-inset-*)` padding on
-  `body`. Also fixes the iOS PWA notch.
-- **W5 font scale** — `textZoom = 100` pinned natively; new `boardTextScale`
-  setting (0.9/1/1.15/1.3) with validator, CSS var, and a "Cỡ chữ bảng" picker
-  in the settings sheet. 7 new tests.
-- **W6 volume rocker** — `setVolumeControlStream(STREAM_MUSIC)`.
-
-### Phase 3 — Store polish
-
-- `app_name` → `Lô tô` (was ASCII `Lo To`).
-- **Launcher icon and splash rebuilt from the brand mark** (see finding below).
-  Legacy + round + adaptive foreground + monochrome at 5 densities; adaptive
-  background as a gradient vector; splash as a themed layer-list with a night
-  variant plus `windowSplashScreen*` for API 31+.
-- 11 stock splash PNGs and the template robot vector deleted.
-- `versionCode 4`, `versionName 0.1.0`.
-- `android/README.md`: permissions, Android-specific behaviour, icon pipeline.
-
-## Findings
-
-### 1. The APK was shipping Capacitor's logo (fixed)
-
-Launcher icon, round icon, adaptive foreground and splash were all the stock
-Capacitor template — the blue "X" mark on a teal grid plate. The brand icon
-existed only in `web/static/icons/`. A published Play Store app was showing
-another project's logo in the launcher and on cold start.
-
-### 2. `source.svg` overflows its canvas (NOT fixed — web scope)
-
-`font-size="240"` renders "Lô tô" at ~437px against a 400px inner panel, and the
-original PNGs were rendered without Roboto Condensed so a wider fallback pushed
-it past the 512px canvas entirely. **`web/static/icons/icon-192.png`,
-`icon-512.png` and `icon-maskable-512.png` are visibly clipped** — the `L` and
-the trailing `ô` are cut off. These are what the PWA, GH Pages install prompt,
-and the OG/Twitter card images use.
-
-Android art was rendered at a corrected size (200 legacy / 160 adaptive) with
-the real font. The web PNGs were left alone — outside approved scope.
-
-### 3. Predictive back changes the mechanism (resolved during planning)
-
-Android 16 stops calling `onBackPressed()` and stops dispatching `KEYCODE_BACK`
-at targetSdk 36. Capacitor 8 shows no back handling in `BridgeActivity`/`Bridge`
-on `main`, so its default "back navigates WebView history" cannot be assumed to
-survive either — meaning a pure-web History-API approach could not have worked
-alone. `OnBackPressedCallback` is the only reliable mechanism.
-
-### 4. `allowBackup` reassessed — no change
-
-Flagged as a gap in the brainstorm. Stored data is grid, crossed cells, and UI
-settings. Nothing sensitive; backup restores a player's card on a new phone.
-Correct as-is.
-
-## Risks carried into device QA
-
-1. **Exit dialog theme.** Activity theme is `AppTheme.NoActionBarLaunch`
-   (parent `Theme.SplashScreen`). Mitigated two ways: explicit
-   `AppTheme.ExitDialog` (`Theme.AppCompat.DayNight.Dialog.Alert`) passed to the
-   builder, and `postSplashScreenTheme` added. If the dialog still throws, the
-   activity theme is the cause.
-2. **`canGoBack()` baseline.** Assumes the WebView has no history at rest.
-   SvelteKit hydrates with `replaceState`, so it should be false — verify back
-   at the root confirms exit rather than navigating.
-3. **`textZoom` pin is an accessibility override.** Only defensible alongside
-   the in-app size control. If that setting is ever cut, cut the pin too.
-4. **Uncompiled Java.** `OnBackPressedCallback` and `Bridge` resolve
-   transitively through `appcompat` / `capacitor-android`; not proven.
-
-## Device QA checklist
-
-- [ ] Tap a cell → vibrates; enable reduced-motion → silent.
-- [ ] Auto-call 3+ min untouched → screen stays lit. Stop → sleeps normally.
-- [ ] Background during auto-call, return → still lit.
-- [ ] Finish a round (remaining 0) → lock releases.
-- [ ] Back with bingo modal open → modal closes, app stays.
-- [ ] Back with settings open → sheet closes.
-- [ ] Back at root → Vietnamese exit dialog; "Ở lại" keeps state.
-- [ ] System font 200% → grid intact; Settings → Cỡ chữ bảng resizes; survives reload.
-- [ ] Gesture nav + status bar clear of the settings gear and footer.
-- [ ] Volume rocker during a call → media slider.
-- [ ] Launcher shows `Lô tô` with the brand icon; themed-icon mode tints it.
-- [ ] Cold start in dark mode → dark splash, no white flash.
-
-## Unresolved questions
-
-1. Fix the clipped web PWA icons (finding 2)? Same root cause, different scope —
-   changes GH Pages / PWA / OG card images.
-2. `boardTextScale` rungs 0.9/1/1.15/1.3 — enough range for users who ran
-   system font at 200%?
-3. Exit confirm currently fires at root regardless of round state. Worth
-   plumbing "is a round live" to native so an idle app exits without a prompt?
diff --git a/android/plans/reports/research-260510-0055-wrap-loto-as-android-app.md b/plans/reports/research-260510-0055-wrap-loto-as-android-app.md
similarity index 100%
rename from android/plans/reports/research-260510-0055-wrap-loto-as-android-app.md
rename to plans/reports/research-260510-0055-wrap-loto-as-android-app.md
diff --git a/web/plans/reports/researcher-260426-2324-loto-rules.md b/plans/reports/researcher-260426-2324-loto-rules.md
similarity index 100%
rename from web/plans/reports/researcher-260426-2324-loto-rules.md
rename to plans/reports/researcher-260426-2324-loto-rules.md
diff --git a/web/plans/todo.md b/plans/todo.md
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