feat: add vocabulary browser with filters, audio playback, and example sentences

- Add Vocabularies page with searchable, level-grouped grid
- Implement multi-faceted filter system (word type, verb class, transitivity, reading ending, character count)
- Add male/female voice audio playback via WaniKani pronunciation data
- Display context sentences from WaniKani API
- Collapsible mnemonics section in detail modal
- Component kanji chips navigate to Collection with pre-filled search
- Vocabulary sync uses upsert to keep data fresh (audio, sentences, normalized POS)
- Add Vocabulary model, controller, service, and API route
- Add seed data with 28 vocabulary entries including transitive/intransitive verb pairs
- Full i18n support (EN, DE, JA) for all new UI elements

docker-compose.dev.yml

@@ -14,17 +14,26 @@ services:
     build: 
       context: ./server
     container_name: zen_server
+    ports:
+      - "3000:3000"
     env_file:
       - ./server/.env
+    depends_on:
+      - mongo
     networks:
       - zen-network
 
   client:
     build: 
       context: ./client
+      target: dev-stage
     container_name: zen_client
+    ports:
+      - "5173:5173"
     env_file:
       - ./client/.env
+    volumes:
+      - ./client/src:/app/src
     depends_on:
       - server
     networks: