Vocab study — noun & adjective flashcards with CEFR level toggles

Add SRS-driven noun and adjective flashcards modeled on the existing verb
flashcard flow:

- SharedModels/Lexeme — catalog of non-verb vocab, frequency-ranked, with
  gender for nouns and optional example sentences. Seeded from a bundled
  vocab_lexemes.json built by Scripts/vocab/build_lexemes.py, which joins
  frequency.csv + es-en.data from a pinned doozan/spanish_data commit
  (CC-BY-SA: hermitdave/FrequencyWords + Wiktionary). 1,449 nouns and 600
  adjectives, each with Wiktionary-sourced gender and (where available)
  an example sentence with English translation.
- LexemeReviewCard + LexemeReviewStore — cloud-synced SM-2 SRS, keyed by
  partOfSpeech + lexemeId + drillMode so future drill modes can coexist.
- LexemeSessionQueue + LexemePool — parallel to VocabSessionQueue; fresh
  cards sort by frequency rank.
- LexemeStudyGroup — cloud-synced resumable session per
  (partOfSpeech, drillMode).
- NounFlashcardPracticeView + AdjectiveFlashcardPracticeView — same flow
  as VocabFlashcardPracticeView: English prompt → tap to reveal Spanish
  → Again/Hard/Good/Easy. Nouns reveal with their article (la taza, el
  problema) so gender is taught alongside meaning, not as a separate
  quiz. Example sentence shown when present.

CEFR-style level toggles:
- LexemeLevel enum (A1/A2/B1/B2/C1+) derived from frequencyRank with
  standard Spanish-frequency-dictionary cutoffs (250/500/1000/2000).
- UserProgress.selectedLexemeLevels — cloud-synced multi-select, defaults
  to A1+A2 on first launch.
- SettingsView gains a "Vocabulary Levels" section with five toggles; the
  existing "Levels" section is renamed "Verb Levels" for clarity.
- Due SRS cards always surface regardless of toggles. Disabling a level
  only stops new cards from that band entering the pool.

PracticeView gets "Nouns" and "Adjectives" rows under "Books".

DataLoader: new lexemeDataVersion gate that re-seeds the Lexeme table
from vocab_lexemes.json independent of book seeding. project.yml lists
the new JSON resource and the existing book_olly-vol2.json (which the
previous build was silently excluding because xcodegen rewrote the
project from project.yml).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Conjuga/Scripts/books/build_glossary.py

@@ -60,10 +60,15 @@ For EACH word, produce one entry:
   dictionary sense.
 - partOfSpeech: one of verb, noun, adjective, adverb, pronoun, preposition,
   conjunction, article, interjection, numeral, proper noun, other.
+- gender: ONLY for `partOfSpeech == "noun"`. "m" for masculine, "f" for
+  feminine, "m/f" for nouns that take either article (estudiante, artista).
+  OMIT the field entirely (or use null) for non-nouns and for cases where the
+  gender is genuinely unknowable from context. Don't guess for non-nouns.
 
 Write the output file as JSON with this exact shape:
     {{"jobId": "<the jobId from the input>", "entries": [
-        {{"word": "...", "baseForm": "...", "english": "...", "partOfSpeech": "..."}}
+        {{"word": "...", "baseForm": "...", "english": "...",
+          "partOfSpeech": "...", "gender": "m"}}
     ]}}
 
 `entries` MUST contain exactly one object per input word, cover every word, and