Benjamin Admin dc60233262 Add Piper TTS audio integration for vocabulary words ...

audio_service.py: Connects to compliance-tts-service (Piper TTS,
MIT license) for high-quality German (Thorsten) and English (Lessac)
voices. Audio cached as MP3 on first request.

vocabulary_api.py: New endpoints:
- GET /vocabulary/word/{id}/audio/{lang} — word pronunciation
- GET /vocabulary/word/{id}/audio-syllables/{lang} — slow syllable-by-syllable

Anton App analysis: identified 5 features to adopt (star system,
games as rewards, progress bars, listening exercises, matching exercises).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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ai_processing

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ai_processor

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alerts_agent

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auth

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classroom

Fix: Re-export SessionResponse from classroom/routes/sessions barrel

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classroom_engine

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content_generators

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game

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generators

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infra

refactor: remove unused pages and backends (model-management, OCR legacy, GPU/vast.ai, video-chat, matrix)

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llm_gateway

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middleware

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services

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state_engine

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.dockerignore

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abitur_docs_api.py

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abitur_docs_models.py

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abitur_docs_recognition.py

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ai_processor.py

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audio_service.py

Add Piper TTS audio integration for vocabulary words

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certificates_api.py

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certificates_models.py

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classroom_api.py

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claude_vision.py

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config.py

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correction_api.py

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correction_endpoints.py

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correction_helpers.py

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correction_models.py

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Dockerfile

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email_service.py

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game_api.py

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game_extended_routes.py

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game_models.py

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game_routes.py

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game_session_routes.py

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klausur_service_proxy.py

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learning_units_api.py

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learning_units.py

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letters_api.py

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letters_models.py

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main.py

Add Vocabulary Learning Platform (Phase 1: DB + API + Editor)

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messenger_api.py

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messenger_contacts.py

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messenger_conversations.py

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messenger_helpers.py

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messenger_models.py

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progress_api.py

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recording_api.py

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recording_helpers.py

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recording_minutes.py

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recording_models.py

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recording_routes.py

Fix: Change empty path to '/' in recording_routes (FastAPI requirement)

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recording_transcription.py

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requirements.txt

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school_api.py

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state_engine_api.py

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state_engine_models.py

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story_generator.py

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teacher_dashboard_analytics.py

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teacher_dashboard_api.py

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teacher_dashboard_models.py

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unit_analytics_api.py

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unit_analytics_export.py

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unit_analytics_helpers.py

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unit_analytics_models.py

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unit_analytics_routes.py

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unit_api.py

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unit_content_routes.py

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unit_definition_routes.py

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unit_helpers.py

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unit_models.py

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unit_routes.py

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vocabulary_api.py

Add Piper TTS audio integration for vocabulary words

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vocabulary_db.py

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worksheets_api.py

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worksheets_models.py

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