HiraKataQuest changelog

• The word list grew from about 250 words to nearly 700. The hiragana deck now carries the common JLPT N5 vocabulary, plus 25 more katakana loanwords, so practising words no longer runs out of material.
• A "Kanji" button on words that have a kanji spelling (off by default; turn on "Kanji reference" in Study scope). It is colored by how the word is normally written: green when it is usually kanji, blue when it is mixed, grey when it is usually kana. Tapping it opens a reference card with the kanji, the reading, the meaning, and, for words that sound alike, the other kanji that share that reading with a one-line note on the difference. Purely informative: it is never quizzed and never scored.
• Filter the Words tab by category (hiragana), with removable chips, both when browsing and when building a word set.
• A "From my strong kana" set generator. It builds a word set out of words whose every kana you already score 85 or better in both writing and reading, so review material comes from what you have actually learned.

• Writing mode now opens the Library instead of a random character. Picking what to practise is the first thing you do, which is how Reading mode already worked. Tapping a character or word drops you straight into practice, and Back returns to the Library.
• Handwriting scores are a measurement now, not a cap. Two scores used to be suspiciously common: a well-formed character the recognizer merely misread always landed on exactly 65, and a scribble that cleared a low bar always landed on exactly 45. Both were ceilings rather than measurements. Recognition now nudges the score instead of capping it, extra strokes actually cost something, no scoring mode is blind to the shape any more, and a backwards stroke is charged once rather than twice. A clean katakana "e" that used to show 65 with a "looks more like" complaint now scores 93; a single random line scores 7 instead of 45.
• The score on the feedback card and the score in the Library finally agree. The Library used to average the raw form dial while the card showed the adjusted number, so the same attempt could read 65 on one screen and 88 on the other. It now stores and averages the number you were actually shown. Practice recorded before this update keeps counting toward your averages.
• Katakana are no longer misread as the kanji they came from. Thirty lookalike pairs (the katakana "e" and the kanji for "work", and so on) are now treated as the same drawing, because nothing in the ink can tell them apart.
• The reading quiz keeps a steady layout. The prompt no longer jumps when you answer, typing works the way it does in flashcard practice (the keyboard stays open, the Done key checks and moves on, an empty answer skips), and memory-hint stories bold the reading they are teaching.

• Your writing score now shows on each word in the Library list. Words in the Characters/Words list already tinted green by score; now they also print the number ("Avg 82 · Best 90", or "Not practiced yet"), matching the grid view and the character rows.
• Reading progress keeps the romaji alongside it. In Reading mode the word list used to replace a word's romaji with its progress stats; it now shows the romaji as usual and puts the progress on its own line, so you never lose the reading.

• Library search ranks results by relevance. An exact match now floats to the top instead of being buried under incidental substring hits, so searching "hat" finds the word "hat" first rather than "that" and "what". Romaji search works the same way, with or without spaces ("boushi" or "bo u shi").
• The reading-progress line labels the typed-answer score "Typing" instead of the terser "Type".

• Memory hints now cover every kana, not just the basic hiragana. Katakana and the voiced, combined, and extended kana all get keyword-and-story hints, most with two or three alternate images to pick from. Composed kana (like きゃ or ヴァ) also show an always-on Structure note that spells out how the piece is built from its parts, separate from the memory hint itself.
• Encouragement as you build a streak in Reading mode. Answer a run of reading questions correctly (in the quiz or in flashcard practice) and the reveal greets you with a short, escalating line of encouragement instead of a flat "Correct!". A gentle note marks a broken streak.
• The writing quiz shows you how the answer is written. When you reveal a writing-quiz answer, its stroke-order animation now plays in the corner (the same demo free practice uses), so a missed character teaches the fix, not just the finished shape.
• An Undo button in the writing quiz. The bottom bar's Back button is now Undo, which reverts just your last stroke so a slip on a many-stroke character no longer means clearing the whole thing.
• Sort your writing-quiz results, and retake the ones that need work. The end-of-quiz summary can now order its items by score (lowest or highest first), and a new button re-quizzes every character or word you scored below a target you set right there (default 80, with quick-pick 60/70/80/90 chips). It is the writing counterpart to Reading mode's "retake the ones I missed".
• A clearer "Add new set" button on the Practice sets tab (was a plain "New").

• The Quiz-me "Practice from" list now shows only the sets in the script you're currently studying, matching the Library's Sets tab.

• A dark mode. New Appearance setting at the bottom of the Options (Study-scope) sheet: System / Light / Dark. It stays Light until you choose, so nothing changes on update. Dark is a warm, paper-like night theme (not a harsh inversion): the writing worksheet itself darkens, with the ghost glyph and grid dimmed to match, and your brush gets a separate ink for dark mode (a light chalk by default) so strokes stay legible on the dark sheet. The same brush-ink row edits whichever appearance is active. System follows your phone's own dark-mode setting. Score tints, the score-feedback card, and every Library surface get dark-appropriate colors too. (Also fixes a latent bug where the status-bar icons could turn invisible on phones set to system dark mode.)
• Memory hints for the basic hiragana. Every one of the 46 basic hiragana now carries a keyword and a short story that tie its shape to its sound. A "How to remember" chip appears in writing practice and on flashcard and quiz answer reveals, and a "Hint" button offers the story before you answer (text-only in the writing quiz, since the shape is the answer). Each kana ships with alternates, so you can open "More ways to remember" and promote whichever image sticks; the choice is saved per character. It all sits behind a Memory hints switch in Options (on by default) and never affects your scores.
• Practice sets now have their own tab. The sets you curate, plus the built-in starter sets, live on a dedicated Sets tab at the top of the Library beside Characters and Words, scoped to the script you're studying. A New button starts a Character set or Word set, and the top-bar search filters sets by name. This replaces the old "Add practice set" / "See sets" buttons in Options.

• The practice-sets manager now shows only the script you have selected in Options: pick Hiragana and you see just your hiragana sets, pick Katakana and you see just your katakana sets (Words and Character sets of that script still appear together). The "See sets" count next to it now reflects that same per-script number instead of the combined total.

• Practicing a saved set in Reading mode now works. It opens the set's characters or words as reading flashcards; previously the button did nothing in Reading mode (it only worked in Writing mode).
• The read-aloud speaker is no longer a dead button when your phone's text-to-speech engine has no Japanese voice: tapping it now opens the system Text-to-speech settings so you can install a Japanese voice or switch to an engine (such as Google Text-to-Speech) that has one.
• The "Looks different in handwriting" note is visible without scrolling on the reading flashcards for さ, き, and り — those cards now give the reveal area more room so the note sits in view under the reading.

• Undo your latest stroke: a new Undo button next to Clear in writing practice reverts just the last stroke you drew, so one slip doesn't cost the progress on the rest of the character or word.

• The repetition layouts are now sizes — XL, L, M, S (replacing 1×1/2×2/3×3, whose grid names meant nothing for words). XL is one big scored copy — the default, and what the quiz uses. L, M, and S tile the sheet with progressively smaller copies, and every step down is guaranteed to give you both visibly smaller cells and strictly more copies to practice on — for single characters and words of any length. Your saved layout carries over (old 2×2 becomes L, old 3×3 becomes S).
• Repetition sheets now fill the canvas with complete rows instead of a fixed 4 or 9 slots — no more ragged, half-empty corner, and taller screens simply get more practice squares. Cells never shrink below a writable minimum (~40dp) for very long words.

• Sort practice sets by how recently you touched them: the sets manager's sort menu gains "Updated: Newest first" and "Updated: Oldest first". Creating, renaming, or editing a set's members counts as touching it, so the set you just worked on rises to the top of "Newest". (Backed by a new updatedAt column — Room v5→v6, additive; existing sets inherit their creation time.)

• The sets list keeps your chosen sort order across editing a set, running a quiz from one, and app restarts — it only changes when you pick a different order from the menu. (It previously reset to Name: A→Z every time the manager was rebuilt.)

• Picking a sort order, or an edit bumping a set to #1, now scrolls the sets list back to the top — previously the list stayed anchored where it was, so the new order (or the freshly bumped set) sat invisibly above the screen.

• Flashcards can now test a word's meaning too: a new "Also test meaning" option on the reading flashcards (words only). After you answer the reading, the card asks what the word means — in the same style you're already using (type it in Typing mode, or pick it from choices in Multiple choice) — and reveals both results together.
• Reading mode reads the answer aloud: once you submit an answer — on a flashcard or in the reading quiz — the character or word is spoken, so you hear the reading you just recalled. On by default; turn it off with the new "Read aloud automatically" switch in the Options menu (Reading's counterpart of the Writing narration toggle — the answer is never spoken early).
• The brush color picker now offers black plus one preset for each main rainbow color, sized so every swatch fits the row.

• Flashcard typing flow: the romaji field and its Check/Next button now share one row, the answer locks once checked, and the keyboard stays open for the whole run — you can drive an entire session from the keyboard's Done key.
• The flashcard keeps the character/word the same size before and after the reveal (the result area is reserved instead of appearing and resizing things).

• Ink now stays inside the box each stroke started in — strokes can no longer bleed into a neighboring character's cell on word sheets.
• Practicing a word from the Library now offers both Again and Next (Next cycles through the word list), matching character practice.
• The whole-word "Average" pill no longer sits flush against the paper's bottom edge.

• Beginner mode now sits in a small, horizontally-centered footer at the bottom of the start screen (previously a full-width row above the mode cards). Its label is smaller and the switch scales down with the system font size.
• "About kana" (opened from "New to kana?") was rewritten: it now opens with what kana are and why the correct stroke order and direction matter, keeps hiragana and katakana, adds a short note on why kanji are left out of this app, and points you to the ⓘ next to the voiced, combined, and extended kana in the Study-scope menu instead of listing them here.

• Turning Beginner mode on no longer nudges the start-screen cards upward: the "New to kana?" link now appears in place without shifting anything above it.

• Brush effects — pick the style your strokes are drawn with, next to the ink color in the Options sheet: Brush (the original), Calligraphy 筆 (the line swells on slow, heavy strokes and thins on fast flicks, with pointed ends), Fountain pen (thin and crisp), and Marker (bold and translucent, so overlaps darken). Purely visual: it never affects your handwriting score.
• Beginner mode — a toggle on the opening screen (off by default). When on, it reveals plain-language ⓘ help for hiragana, katakana, and the voiced, combined, and extended kana groups, plus a "New to kana?" overview. Its own ⓘ explains what the mode is and who it helps. Leave it off for a cleaner screen.
• Kana concept explainers — the ⓘ help above, written for first-time learners (shown only in Beginner mode).
• Read aloud automatically — an optional Study-scope setting (Writing only): each new character or word is spoken by the device voice the moment it appears, so you hear the reading without tapping the speaker.

• Reading flashcards — the typed-romaji answer and reading no longer slip behind the keyboard on smaller screens, and the printed glyph now sits centered on the card instead of low.

• Large system fonts no longer break the UI (found on a Realme GT 7 Pro; the app was hand-tuned to a Pixel 7 at font scale 1.0):
  • the 1×1/2×2/3×3 layout picker labels no longer wrap/clip in the control strip;
  • the flashcard reveal (reading · audio · meaning) no longer renders shredded text next to the speaker, and the big glyph can no longer overflow its card;
  • the quiz setup's "Exact number" label/hint no longer wraps awkwardly ("+" orphaned on its own line);
  • the practice-set cards' Quiz · Practice · Edit · Rename · Delete actions always fit on ONE line (the labels shrink together when space is tight);
  • the Library's search field gets real width while searching (the view toggle, Sort menu, and "Quiz me!" hide until search closes).
• The opening screen scrolls (still centered) instead of clipping on short screens / huge fonts; its cards' width modifier fixed for very wide screens.

• Edge-to-edge: the app now draws behind the system bars (transparent bars, washi background showing through) with content inset via safeDrawing — also future-proofs Android 15's forced edge-to-edge and display cutouts.
• The practice screen's guide panel and action bar grow with the system font scale (the canvas absorbs the difference); same for the writing quiz header.
• Dense "icon-like" chrome (gojūon chart cells, selection grid cells, corner score badges, the layout-picker labels) is now font-scale-independent — sized like icons; the list views remain the fully font-scaling path.
• Word-grid columns widen with the font scale (fewer, wider columns).

• In-app self-updater — on launch the app checks the project's GitHub Releases for a newer version and, if one exists, shows an "Update available" dialog. Tap Update to download the new APK and hand it to Android's installer (Later dismisses; Skip silences that one version). No Play Store, no extra app. Uses plain HttpURLConnection (no new dependency); a flaky/offline network fails silently. The one-time "install unknown apps" grant is requested on first use.
• Proper release signing — release builds are now signed with a dedicated release keystore (via a gitignored keystore.properties), so update-over-install works reliably. BuildConfig is enabled for the version comparison.

• Version bumped to 0.1.1 (versionCode 2).
• New permissions: INTERNET, REQUEST_INSTALL_PACKAGES; added a FileProvider to serve the downloaded APK to the installer.

• An opening screen (home) to pick Reading or Writing — the app now starts on a top-level chooser, and you can switch modes anytime from the new Reading | Writing toggle in the Study-scope sheet.
• Reading mode — two new ways to study without handwriting:
  • a reading quiz — see the printed glyph or word and answer by multiple choice or by typing the romaji (lenient matching); word items can optionally also test the English meaning.
  • a flashcard study mode — flip a printed card to reveal the reading, audio, and meaning; a "Type the reading" toggle adds a romaji input field.
• Reading accuracy tracking — recorded per glyph/word as two independent percentages (multiple-choice and typed). The Library tints cells by their average (no "best" — reading is pass/fail), shows both percentages in list rows, and can sort by Average / Multiple-choice / Typed, ascending or descending.
• New Room v5 table reading_progress (MIGRATION_4_5).

• Writing mode always uses the handwritten (KanjiVG-stroke) ghost. The old Printed / Handwritten "Character style" selector is replaced by the Reading | Writing mode toggle.
• The Activity now uses windowSoftInputMode=adjustResize and the flashcard card is responsive, so nothing clips behind the on-screen keyboard.

• Build + unit tests green (added RomajiMatchTest); device-verified on a Pixel 7, including the live v4→v5 migration.

• Sort the Library list by your scores — a Sort menu in the Library app bar (list view only; the chart keeps its fixed gojūon order) reorders characters or words by average or best score, ascending or descending, with a Default order reset. Not-yet-practiced items sink to the bottom, and changing the order snaps the list back to the top so the new leaders are visible.
• Smart "All" when building a practice set — in Add practice set, the All button opens a popup that selects only the items you still need to drill: "Only under a score of" (default 85, −/+ stepper, tap-to-type a whole number 1–99, and 70 / 80 / 90 / 99 quick-pick chips) plus a checkbox "Exclude {characters|words} I have not studied yet" (on by default). Turn the cap off to select everything (the previous behavior). Applies on Select.
• Score-aware selection list — the set-builder's list rows now mirror the Library browse rows (score-color tint + "avg · best"/"Not practiced yet") and carry the same Sort menu, so weak items are easy to spot; selection shows as a checkbox plus a border over the score tint.

• Brush ink color moved into the Options (Study-scope) sheet as a labeled Brush ink color row (with its color swatch); the app-bar slot it vacated now holds the Sort menu.
• The Options sheet fits on a ~6.3″ phone (e.g. Pixel 7) without scrolling at default font sizes — tightened section spacing, dividers, and toggle-row padding (still uncramped; the ~90 %-height scroll fallback remains for very large fonts).

• Character style — Printed vs Handwritten — a persisted CharacterForm setting (selector in the Study-scope sheet). Printed keeps the typographic font ghost you read on signs and screens; Handwritten draws the guide ghost from the same KanjiVG strokes the demo and scorer use (a grey brush), for both practice and the quiz. Rendering only — it never changes what is studied, demonstrated, or scored.
• A "character X of Y" / "word X of Y" position line under the reading in the practice guide panel (the item's place in the active-script scoped list).

• The stroke-order demo now renders as a bold, glyph-proportional brush (previously a thin 3.5 dp wireframe), matching the printed form of the glyph.
• User ink is now a uniform fixed-width brush — dropped pen-pressure (finger contact size), speed thinning, and head/tail tapers, so a chubby finger and a thin stylus draw identically and the ink matches the demo. Width is the same fraction of the glyph as the demo at every size, so words, composite glyphs, and 2×2/3×3 grids thin automatically. Scoring is unaffected (it reads the raw points).
• Removed the redundant Replay button from the stroke-order controls (Play already restarts the animation).

• Tap to hear a kana or word — a small speaker button sits next to every reading (practice guide panel, Library list rows + word cards, and the quiz prompt + summary) and speaks it with the device's Japanese text-to-speech voice. Uses the framework TextToSpeech (ja-JP) fed the raw kana glyph — no new dependency, permission, manifest, or Room change. If the Japanese voice is not installed the button opens the system voice-data installer; if TTS is unavailable it greys out. Availability re-checks on resume, so a freshly installed voice starts working without a restart. (The dense gojūon chart cells intentionally omit the button — no room.)

• Romaji search in the Library — words are now findable by their reading, not just kana/meaning: ねこ matches neko, ne ko, ねこ, or cat. The query and every searched field are run through a shared searchNormalize() (drops all whitespace, lowercases), so romaji typed with or without spaces and in any case compare equal, and multi-word glosses match too ("ice cream" ⇒ "icecream"). Word readings come from the ViewModel's pronunciationOf. Kana input is unchanged (still scoped to the active Hiragana/Katakana tab).

• Library search field uses a normal search-input text size (bodyLarge, 16 sp) instead of the oversized title style, so a longer query like "ka me ra" fits the narrow title slot without the single-line field scrolling and clipping the first character.
• Multi-copy layouts are repetition worksheets for words too — in 2×2/3×3, a word (like a single character) now shows Clear · Next with no Submit/scoring; the Submit→score two-step exists only in the 1×1 layout.
• Per-kana word score chips are responsive — an equal-weight row that resizes to fit a 4+ kana word on one line inside the canvas, with insets that clear the paper card's rounded corner (both practice and quiz).

• The guided SRS study session — the app is now free practice + the "Quiz me!" quiz only. Deleted SrsScheduler, LessonGenerator, StudySession, and PracticeActionBar (the Again/Hard/Good/Easy grade bar; FreePracticeActionBar split into its own file), plus the three domain/learning test files. SessionPhase collapsed to LOADING/FREE; the COMPLETE summary, the "Start a study session" / "Start next session" entry points, and the Library's "Learned/Locked" status labels are gone.

• Built-in default practice sets — ~32 sets seeded once per install (persisted default_sets_seeded flag): for each script, the 10 gojūon rows + the Voiced / Combined / Extended kana categories + starter word sets (Colors / Nature / Seasons; Food & drink / Countries / Everyday items). They are ordinary editable sets afterward, and a deleted default does not return.

• Whether writing is scored is now governed solely by the Score my writing setting — there is no separate graded flow.
• Unscored Library cells / rows / cards use a neutral tint (previously a learned/unlocked highlight); the score-spectrum coloring is unchanged.
• Room untouched at v4 — the review_cards / character_progress / vocabulary_progress tables + entities/DAOs + RoomLearningRepository remain as dormant, unused schema (removing them would need a destructive migration).

• Suite is now 84 unit tests, 0 failures (removed the SRS / lesson-generator / vocabulary-unlock suites; trimmed ScriptScopeTest to its pure filter/gating cases; added default-practice-set seeding tests).

• Library drag-select no longer inverts: dragging across already-selected items now deselects them. The gesture read a stale captured selection set; it now reads the live set via rememberUpdatedState.
• Duplicate-key crash-proofing — word lists, grids, and selection rows now use unique Compose list keys, so a future homograph word (e.g. あめ rain/candy, はし bridge/chopsticks) can't hard-crash the Library. (Shipped data is clean today.)
• Word stroke-order demo play/pause reflects whether any kana is animating, so the control no longer shows the wrong icon or restarts a single kana out of sync.
• Layout switch mid-review clears pending FREE feedback and the submitted flag, so changing the 1×1/2×2/3×3 layout no longer strands an "Again/Next" card over a blank sheet.
• Quiz with scoring Off now counts written-but-unscored items as written instead of mislabeling them "Skipped".
• SRS interval overflow — the review interval is capped at MAX_INTERVAL_DAYS (100 years), preventing integer overflow after very long GOOD/EASY streaks.
• Brush width is clamped against degenerate/transient canvas layouts (no giant ink blob during a layout change).
• Startup warms the SharedPreferences disk load off the main thread.
• Doc reconciliations for ReviewCard (repetitions / due-date semantics).

• Suite grew to 129 unit tests, 0 failures (regressions added for layout-reset, scoring-off recording, SRS interval cap, stroke-attribution ties, degenerate geometry scoring).

• Practice sets — user-curated, named lists of characters or words, persisted via Room v4 (practice_sets + practice_set_items, additive MIGRATION_3_4). Built in a Library selection mode (tap + drag-range select, list/grid toggle) and managed in a sets manager (rename / delete / edit members / Quiz / Practice, a sort menu, and a color-coded per-set average score).
• Word quizzes — the "Quiz me!" flow now handles whole words as well as single characters (words scored per-kana with an average). The quiz setup gained a source picker: the current study scope, or any saved set.

• The Study-scope ("Filter") sheet opens to full content height.

• Per-kana whole-word scoring — a multi-kana word traced on one sheet is scored per kana (StrokeAttribution assigns each stroke to its nearest cell); per-kana score chips + an average render on the canvas and persist to history.
• FREE-practice two-step: write → Submit (scores, keeps the ink, shows feedback) → Again (retry the same glyph) / Next (advance); an empty canvas offers Skip.
• Per-kana stroke-order previews for words, sharing one playback-controls row.
• Library score color-coding — a red→green spectrum tints chart squares, word cards, and list rows, with a corner score badge.
• Brush ink-color picker — trace in any color (HSV dialog in the Library top bar); purely visual, persisted, never affects scoring or scheduling.
• "Score my writing" Form/Fit/Both/Off picker added to the Library's Study-scope sheet (previously quiz-only). Off ⇒ FREE practice collapses to Clear · Next and records no history row (SRS/unlock unaffected).

• Scoring is restricted to a single 1×1 cell; multi-copy 2×2/3×3 layouts are treated as repetition worksheets (no score).
• Word stroke-preview sizing fixed so 3+ kana words show every demo at once (no clipping).

• scoringMode / scoreStats preserved across session rebuilds (was silently reset by "Start next session").
• Stale async handwriting-recognition results can no longer clobber the current glyph's score.
• First-trace introduce + increment run sequentially so the trace count can't be lost.
• ScriptScope word gating is per-reading-unit, so a mixed dakuten+yōon word (でんしゃ) is offered only when actually unlockable.
• Stale word-score chips cleared on scoring-mode change; word-preview effects scoped by engine identity.
• Added the project's first ViewModel tests.

• Extended kana (third opt-in) — small tsu (っ/ッ), small vowels, ゔ/ヴ, 22 foreign-sound katakana composites (ファ/ティ/ヴァ/シェ …), and obsolete ゐゑ/ヰヱ. Completes the inventory: 113 hiragana + 136 katakana, ~397 words.
• Yōon (second opt-in) — contracted syllables (きゃ/しゅ/きょ …), the app's first composite characters (2-code-point glyphs whose strokes are composed from a base kana + a small ゃ/ゅ/ょ). KanaUnits groups a base + small kana into one reading unit.
• Dakuten / handakuten (first opt-in) — voiced (が/ざ/だ/ば) and semi-voiced (ぱ) kana for both scripts, classified from the glyph via Unicode NFD (KanaKind).
• Katakana — a second script alongside hiragana (46 homologues + ー), a persisted activeScript setting, and a Hiragana/Katakana selector in the Library.

Each advanced group is off by default (a Library toggle folds it in) so beginners meet only the base gojūon first. The learning engine and Room schema were reused unchanged (new rows are additive; off-scope cards are inert orphans).

• Deck grown from 5 characters to the full 46-character basic gojūon (あ〜ん), then to the complete voiced/yōon/extended sets, all via the KanjiVG stroke-geometry pipeline.
• Vocabulary grown to hundreds of composability-validated words per script.

• startNextSession no longer drops activeScript / opt-in settings on rebuild.
• Script/scope toggles act as in-place Library filters instead of bouncing the user out.

• Rebrand to "HiraKataQuest" with a new hinomaru launcher icon.
• Handwriting-quality scorer (domain/scoring/ — geometry form/fit dials + ML Kit digital-ink recognition; advisory only, never touches SRS), persisted via Room v3.
• "Quiz me!" write-from-memory mode.
• Library overlay for free practice of any character/word, plus a list ⇄ chart (gojūon cheat-sheet) view.

• Stroke geometry re-sourced from KanjiVG (CC BY-SA); ink rendered as a variable-width brush ribbon.
• Force-dark opt-out (light-only theme) after a dark-mode device inversion.

• Spaced repetition (SrsScheduler, simplified SM-2) and session generation (LessonGenerator) — pure, clock-injected, unit-tested.
• Vocabulary unlocking — words unlock once every required kana is learned.
• Session state machine (PracticeViewModel): REVIEWS → NEW/PRACTICE → VOCABULARY → COMPLETE → FREE; grades AGAIN/HARD/GOOD/EASY.
• Persistence — Room v1→v2 (MIGRATION_1_2: rename practice_attempts → practice_history, add source, add SRS/progress/vocabulary tables), exportSchema.
• The project's first tests (45 JUnit4).

• StrokeAnimationEngine — strokes draw themselves in recorded order, direction, and rhythm, with visible pen lifts; play / pause / replay / speed (0.5×–2×) / auto-repeat.
• Timed strokeAnimations data generated offline from the SVG stroke paths; the static numbered diagram (StrokeOrderDiagram) became the fallback for glyphs without timing.

• Guide-panel controls no longer crush to zero width on short screens.
• strokeAnimations are consistency-checked against strokes[] and voided (with a fallback to the static diagram) when malformed.

• Initial app: single PracticeScreen — character guide (top), a custom Compose tracing Canvas with a 2×2 genkōyōshi grid + light-grey ghost glyph + stylus/finger input with pressure capture (middle), and Clear / Next / grade buttons (bottom).
• Drawing engine (StrokePoint / UserStroke / DrawingSession, CanvasState), MVVM structure, Material 3, minimal Room, and the first 5 hiragana (あいうえお).