api/app/config.py

@@ -15,16 +15,10 @@ class Settings(BaseSettings):
     scaleway_tem_project_id: str = ""
     scaleway_tem_from_address: str = ""
     scaleway_tem_region: str = "fr-par"
-    storage_provider: str = "local"  # or 'bunny'
-    storage_endpoint_url: str = ""
-    storage_access_key: str = ""
-    storage_secret_key: str = ""
+    storage_endpoint_url: str
+    storage_access_key: str
+    storage_secret_key: str
     storage_bucket: str = "langlearn"
-    bunny_zone: str = "languagelearningapp"
-    bunny_api_key: str = ""
-    bunny_cdn_base_url: str = ""
-    bunny_token_auth_key: str = ""
-    bunny_storage_endpoint: str = "https://storage.bunnycdn.com"
     stub_generation: bool = False
 
     model_config = {"env_file": ".env"}

api/app/domain/services/adventure_service.py

@@ -24,7 +24,7 @@ from ...outbound.postgres.repositories.adventure_repository import (
     PostgresAdventureRepository,
 )
 from ...outbound.spacy.spacy_client import SpacyClient
-from ...outbound.storage_client import get_storage_client
+from ...storage import upload_audio
 from ..models.adventure import (
     Adventure,
     AdventureEntry,
@@ -251,7 +251,7 @@ class AdventureService:
                 for sent_idx, target_sent in enumerate(target_nlp["sentences"]):
                     t0 = time.monotonic()
                     translated_sentence = await self.deepl_client.translate(
-                        target_sent["text"], adventure.source_language, paragraph_text
+                        target_sent["text"], adventure.source_language
                     )
                     timing_translations += time.monotonic() - t0
 
@@ -315,7 +315,7 @@ class AdventureService:
             # ── File upload ───────────────────────────────────────────────────
             t0 = time.monotonic()
             audio_key = f"adventure-audio/{entry_id}.wav"
-            get_storage_client().upload(audio_key, wav_bytes)
+            upload_audio(audio_key, wav_bytes)
             timing_file_uploading = time.monotonic() - t0
 
             await self.audio_repo.create(

api/app/domain/services/summarise_service.py

@@ -14,7 +14,7 @@ from ...outbound.deepgram.deepgram_client import LocalDeepgramClient
 from ...outbound.deepl.deepl_client import DeepLClient
 from ...outbound.gemini.gemini_client import GeminiClient
 from ...outbound.spacy.spacy_client import SpacyClient
-from ...outbound.storage_client import get_storage_client
+from ...storage import upload_audio
 from ...languages import SUPPORTED_LANGUAGES
 
 
@@ -137,7 +137,7 @@ class SummariseService:
             voice = self.gemini_client.get_voice_by_language(target_language)
             wav_bytes = await self.gemini_client.generate_audio(generated_text, voice)
             audio_key = f"audio/{job_id}.wav"
-            get_storage_client().upload(audio_key, wav_bytes)
+            upload_audio(audio_key, wav_bytes)
 
             transcript = await self.deepgram_client.transcribe_bytes(wav_bytes, target_language)
 

api/app/main.py

@@ -8,13 +8,13 @@ from .routers.api import jobs
 from .routers import media as media_router
 from .routers.api.main import api_router
 from .routers.bff.main import bff_router
-from .outbound.storage_factory import init_storage
+from .storage import ensure_bucket_exists
 from . import worker
 
 
 @asynccontextmanager
 async def lifespan(app: FastAPI):
-    init_storage()
+    ensure_bucket_exists()
     worker_task = asyncio.create_task(worker.worker_loop())
     yield
     worker_task.cancel()

api/app/outbound/bunny/bunny_client.py

@@ -1,77 +0,0 @@
-import base64
-import hashlib
-import time
-import urllib.error
-import urllib.request
-
-_SIGNED_URL_EXPIRY_SECONDS = 3600
-
-
-class BunnyClient:
-    def __init__(
-        self,
-        zone: str,
-        api_key: str,
-        cdn_base_url: str,
-        token_auth_key: str,
-        storage_endpoint: str = "https://storage.bunnycdn.com",
-    ) -> None:
-        self._zone = zone
-        self._api_key = api_key
-        self._cdn_base_url = cdn_base_url.rstrip("/")
-        self._token_auth_key = token_auth_key
-        self._storage_endpoint = storage_endpoint.rstrip("/")
-
-    def _storage_url(self, path: str) -> str:
-        return f"{self._storage_endpoint}/{self._zone}/{path.lstrip('/')}"
-
-    def upload(self, path: str, data: bytes) -> bool:
-        req = urllib.request.Request(
-            self._storage_url(path),
-            data=data,
-            method="PUT",
-            headers={
-                "AccessKey": self._api_key,
-                "Content-Type": "audio/wav",
-            },
-        )
-        try:
-            with urllib.request.urlopen(req) as resp:
-                return resp.status == 201
-        except urllib.error.HTTPError:
-            return False
-
-    def get_url(self, path: str) -> str:
-        url_path = f"/{path.lstrip('/')}"
-        expiration = int(time.time()) + _SIGNED_URL_EXPIRY_SECONDS
-        digest = hashlib.sha256(
-            (self._token_auth_key + url_path + str(expiration)).encode()
-        ).digest()
-        token = (
-            base64.b64encode(digest)
-            .decode()
-            .replace("+", "-")
-            .replace("/", "_")
-            .replace("=", "")
-        )
-        return f"{self._cdn_base_url}{url_path}?token={token}&expires={expiration}"
-
-    def get_public_url(self, path: str) -> str:
-        return f"{self._cdn_base_url}/{path.lstrip('/')}"
-
-    def delete(self, path: str) -> bool:
-        req = urllib.request.Request(
-            self._storage_url(path),
-            method="DELETE",
-            headers={"AccessKey": self._api_key},
-        )
-        try:
-            with urllib.request.urlopen(req) as resp:
-                return resp.status == 200
-        except urllib.error.HTTPError:
-            return False
-
-    def download(self, path: str) -> tuple[bytes, str]:
-        raise NotImplementedError(
-            "Direct download not available with Bunny — use get_url() to obtain a signed CDN URL"
-        )

api/app/outbound/gemini/gemini_client.py

@@ -1,19 +1,9 @@
 import asyncio
-import io
-import wave
 
 from google import genai
 from google.genai import types as genai_types
 
-
-def _pcm_to_wav(pcm_data: bytes, sample_rate: int = 24000) -> bytes:
-    buf = io.BytesIO()
-    with wave.open(buf, "wb") as wf:
-        wf.setnchannels(1)
-        wf.setsampwidth(2)
-        wf.setframerate(sample_rate)
-        wf.writeframes(pcm_data)
-    return buf.getvalue()
+from ...storage import pcm_to_wav
 
 VOICE_BY_LANGUAGE: dict[str, str] = {
     "fr": "Kore",
@@ -57,6 +47,6 @@ class GeminiClient():
                 ),
             )
             pcm_data = response.candidates[0].content.parts[0].inline_data.data
-            return _pcm_to_wav(pcm_data)
+            return pcm_to_wav(pcm_data)
 
         return await asyncio.to_thread(_call)

api/app/outbound/minio/minio_client.py

@@ -1,70 +0,0 @@
-import boto3
-from botocore.exceptions import ClientError
-
-
-class MinioClient:
-    def __init__(
-        self,
-        endpoint_url: str,
-        access_key: str,
-        secret_key: str,
-        bucket: str,
-        api_base_url: str,
-    ) -> None:
-        self._endpoint_url = endpoint_url
-        self._access_key = access_key
-        self._secret_key = secret_key
-        self._bucket = bucket
-        self._api_base_url = api_base_url.rstrip("/")
-
-    def _s3(self):
-        return boto3.client(
-            "s3",
-            endpoint_url=self._endpoint_url,
-            aws_access_key_id=self._access_key,
-            aws_secret_access_key=self._secret_key,
-        )
-
-    def ensure_bucket_exists(self) -> None:
-        client = self._s3()
-        try:
-            client.head_bucket(Bucket=self._bucket)
-        except ClientError as e:
-            if e.response["Error"]["Code"] in ("404", "NoSuchBucket"):
-                client.create_bucket(Bucket=self._bucket)
-            else:
-                raise
-
-    def upload(self, path: str, data: bytes) -> bool:
-        try:
-            self._s3().put_object(
-                Bucket=self._bucket,
-                Key=path,
-                Body=data,
-                ContentType="audio/wav",
-            )
-            return True
-        except ClientError:
-            return False
-
-    def get_url(self, path: str) -> str:
-        return f"{self._api_base_url}/media/{path}"
-
-    def get_public_url(self, path: str) -> str:
-        return f"{self._api_base_url}/media/{path}"
-
-    def delete(self, path: str) -> bool:
-        try:
-            self._s3().delete_object(Bucket=self._bucket, Key=path)
-            return True
-        except ClientError:
-            return False
-
-    def download(self, path: str) -> tuple[bytes, str]:
-        try:
-            response = self._s3().get_object(Bucket=self._bucket, Key=path)
-            return response["Body"].read(), response.get("ContentType", "audio/wav")
-        except ClientError as e:
-            if e.response["Error"]["Code"] in ("NoSuchKey", "404"):
-                raise FileNotFoundError(path)
-            raise

api/app/outbound/storage_client.py

@@ -1,21 +0,0 @@
-from typing import Protocol
-
-_client: "StorageClient | None" = None
-
-
-class StorageClient(Protocol):
-    def upload(self, path: str, data: bytes) -> bool: ...
-    def get_url(self, path: str) -> str: ...
-    def get_public_url(self, path: str) -> str: ...
-    def delete(self, path: str) -> bool: ...
-    def download(self, path: str) -> tuple[bytes, str]: ...
-
-
-def get_storage_client() -> "StorageClient":
-    assert _client is not None, "Storage client not initialised — call init_storage() at startup"
-    return _client
-
-
-def _set_storage_client(c: "StorageClient") -> None:
-    global _client
-    _client = c

api/app/outbound/storage_factory.py

@@ -1,27 +0,0 @@
-from ..config import settings
-from .storage_client import StorageClient, _set_storage_client
-from .minio.minio_client import MinioClient
-from .bunny.bunny_client import BunnyClient
-
-
-def init_storage() -> None:
-    client: StorageClient
-    if settings.storage_provider == "bunny":
-        client = BunnyClient(
-            zone=settings.bunny_zone,
-            api_key=settings.bunny_api_key,
-            cdn_base_url=settings.bunny_cdn_base_url,
-            token_auth_key=settings.bunny_token_auth_key,
-            storage_endpoint=settings.bunny_storage_endpoint,
-        )
-    else:
-        minio = MinioClient(
-            endpoint_url=settings.storage_endpoint_url,
-            access_key=settings.storage_access_key,
-            secret_key=settings.storage_secret_key,
-            bucket=settings.storage_bucket,
-            api_base_url=settings.api_base_url,
-        )
-        minio.ensure_bucket_exists()
-        client = minio
-    _set_storage_client(client)

api/app/routers/api/jobs.py

@@ -12,7 +12,7 @@ from ...outbound.postgres.repositories import summarise_job_repository
 from ...outbound.postgres.repositories.translated_article_repository import TranslatedArticleRepository
 from ...outbound.postgres.entities.translated_article_entity import TranslatedArticleEntity
 from ...outbound.gemini.gemini_client import GeminiClient
-from ...outbound.storage_client import get_storage_client
+from ...storage import upload_audio
 from ...config import settings
 from ... import worker
 
@@ -92,7 +92,7 @@ async def _run_regenerate_audio(job_id: uuid.UUID) -> None:
             voice = gemini_client.get_voice_by_language(article_entity.target_language)
             wav_bytes = await gemini_client.generate_audio(article_entity.target_body, voice)
             audio_key = f"audio/{job_id}.wav"
-            get_storage_client().upload(audio_key, wav_bytes)
+            upload_audio(audio_key, wav_bytes)
 
             await article_repo.update_audio(
                 article_entity.id,

api/app/routers/bff/adventure.py

@@ -5,8 +5,8 @@ from pydantic import BaseModel
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from ...auth import verify_token
+from ...config import settings
 from ...outbound.postgres.database import get_db
-from ...outbound.storage_client import get_storage_client
 from ...outbound.postgres.repositories.adventure_repository import (
     PostgresAdventureEntryAudioRepository,
     PostgresAdventureEntryChoiceRepository,
@@ -61,7 +61,7 @@ class AdventureDetailResponse(BaseModel):
 def _audio_url(key: str | None) -> str | None:
     if key is None:
         return None
-    return get_storage_client().get_url(key)
+    return f"{settings.api_base_url}/media/{key}"
 
 
 @router.get("/{adventure_id}", response_model=AdventureDetailResponse, status_code=200)

api/app/routers/bff/articles.py

@@ -6,8 +6,8 @@ from pydantic import BaseModel
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from ...auth import verify_token
+from ...config import settings
 from ...outbound.postgres.database import get_db
-from ...outbound.storage_client import get_storage_client
 from ...outbound.postgres.repositories.translated_article_repository import TranslatedArticleRepository
 
 router = APIRouter(prefix="/articles", tags=["bff", "articles"])
@@ -46,7 +46,7 @@ class ArticleDetail(BaseModel):
 def _audio_url(key: str | None) -> str | None:
     if key is None:
         return None
-    return get_storage_client().get_url(key)
+    return f"{settings.api_base_url}/media/{key}"
 
 
 @router.get("", response_model=ArticleListResponse, status_code=200)

api/app/routers/media.py

@@ -3,11 +3,12 @@ import uuid
 from fastapi import APIRouter, Depends, HTTPException
 from fastapi.responses import Response
 from sqlalchemy.ext.asyncio import AsyncSession
+from botocore.exceptions import ClientError
 
 from ..outbound.postgres.database import get_db
 from ..outbound.postgres.repositories.translated_article_repository import TranslatedArticleRepository
 from ..outbound.postgres.repositories.adventure_repository import PostgresAdventureEntryAudioRepository
-from ..outbound.storage_client import get_storage_client
+from ..storage import download_audio
 
 router = APIRouter(prefix="/media", tags=["media"])
 
@@ -22,23 +23,21 @@ async def get_adventure_audio_file(
     except ValueError:
         raise HTTPException(status_code=400, detail="Invalid file ID")
     
+    print(f"Looking for adventure audio with entry ID: {eid}")
+    
     adventure_audio = await PostgresAdventureEntryAudioRepository(db).get_for_entry(entry_id=eid, component_type="story_text")
     
     if adventure_audio is None:
         raise HTTPException(status_code=404, detail="File not found")
-
     try:
-        audio_bytes, content_type = get_storage_client().download("adventure-audio/" + filename)
-    except FileNotFoundError:
+        audio_bytes, content_type = download_audio("adventure-audio/" + filename)
+    except ClientError as e:
+        if e.response["Error"]["Code"] in ("NoSuchKey", "404"):
             raise HTTPException(status_code=404, detail="File not found")
-    except NotImplementedError:
-        raise HTTPException(status_code=501, detail="Media proxy not available with current storage provider")
-    except Exception:
         raise HTTPException(status_code=500, detail="Storage error")
 
     return Response(content=audio_bytes, media_type=content_type)
 
-
 @router.get("/{filename:path}")
 async def get_media_file(
     filename: str,
@@ -50,12 +49,11 @@ async def get_media_file(
         raise HTTPException(status_code=404, detail="File not found")
 
     try:
-        audio_bytes, content_type = get_storage_client().download(filename)
-    except FileNotFoundError:
+        audio_bytes, content_type = download_audio(filename)
+    except ClientError as e:
+        if e.response["Error"]["Code"] in ("NoSuchKey", "404"):
             raise HTTPException(status_code=404, detail="File not found")
-    except NotImplementedError:
-        raise HTTPException(status_code=501, detail="Media proxy not available with current storage provider")
-    except Exception:
         raise HTTPException(status_code=500, detail="Storage error")
 
     return Response(content=audio_bytes, media_type=content_type)
+

api/app/storage.py

@@ -0,0 +1,56 @@
+import io
+import wave
+
+import boto3
+from botocore.exceptions import ClientError
+
+from .config import settings
+
+
+def get_s3_client():
+    return boto3.client(
+        "s3",
+        endpoint_url=settings.storage_endpoint_url,
+        aws_access_key_id=settings.storage_access_key,
+        aws_secret_access_key=settings.storage_secret_key,
+    )
+
+
+def ensure_bucket_exists() -> None:
+    client = get_s3_client()
+    try:
+        client.head_bucket(Bucket=settings.storage_bucket)
+    except ClientError as e:
+        if e.response["Error"]["Code"] in ("404", "NoSuchBucket"):
+            client.create_bucket(Bucket=settings.storage_bucket)
+        else:
+            raise
+
+
+def pcm_to_wav(pcm_data: bytes, sample_rate: int = 24000) -> bytes:
+    """Wrap raw 16-bit mono PCM data in a WAV container."""
+    buf = io.BytesIO()
+    with wave.open(buf, "wb") as wf:
+        wf.setnchannels(1)
+        wf.setsampwidth(2)  # 16-bit
+        wf.setframerate(sample_rate)
+        wf.writeframes(pcm_data)
+    return buf.getvalue()
+
+
+def upload_audio(object_key: str, audio_bytes: bytes, content_type: str = "audio/wav") -> None:
+    client = get_s3_client()
+    client.put_object(
+        Bucket=settings.storage_bucket,
+        Key=object_key,
+        Body=audio_bytes,
+        ContentType=content_type,
+    )
+
+
+def download_audio(object_key: str) -> tuple[bytes, str]:
+    """Return (file_bytes, content_type)."""
+    client = get_s3_client()
+    response = client.get_object(Bucket=settings.storage_bucket, Key=object_key)
+    content_type = response.get("ContentType", "audio/wav")
+    return response["Body"].read(), content_type

api/docs/design-doc-object-storage.md

@@ -1,82 +0,0 @@
-# Design Document: Object Storage with Bunny CDN
-
-This is a technical design document for implementing object (e.g. audio file) storage with Bunny CDN.  This directory (`api/docs`) contains other similar files, notably `architecture.md` and `domain.md`.  When you have worked through the change described here, please update `architecture.md`
-
-## The problem
-
-Language Learning App has audio as a core component, which requires files to be delivered to the end user.  When developing locally, these files have been stored in a min.io service, mimicking an S3-like storage bucket.  
-
-Using this approach on a deployed instance (e.g. on a VPS using Docker), would result in high bandwidth and therefore a high cost.  Using a dedicated, EU-based service like Bunny allows us to offload the delivery of content to a third-party at reduced cost (great!)
-
-## The current implementation
-
-Object storage was one of the first features built into this software in MVP state, as such it does not fit within the current architecture.
-
-Right now `api/app/storage.py` contains some helper functions, notably the `upload_audio` and `download_audio` functions.
-
-Users (through the web client) retrieve the media through two URLs (detailed in `api/app/routers/media.py`):
-
-- `GET /media/adventure-audio/{filename:path}` for the choose-your-own-adventure file names
-- `GET /media/{filename:path}`, used for the summary transcriptions
-
-## The solution
-
-We are going to use Bunny (bunny.net) as the CDN for all objects in deployed environments (right now, just production — in the future preprod or staging may exist).
-
-Locally, for development purposes, we retain the use of MinIO. To decide which backend to use, we introduce an environment variable `STORAGE_PROVIDER` with a default value of `local` and an accepted alternative of `bunny`.
-
-In situations where we use `local`, the existing `/media/..` proxy endpoints are returned when constructing audio URLs (e.g. in `api/app/routers/bff/articles.py` and `api/app/routers/bff/adventure.py`). When we use `bunny`, the Bunny CDN URL is returned directly so the request is never proxied through our service.
-
-### Client interface
-
-We will create a `BunnyClient` in `api/app/outbound/bunny/bunny_client.py` and extract the current MinIO logic into a `MinioClient` in `api/app/outbound/minio/minio_client.py`. Both implement a shared `StorageClient` protocol.
-
-The interface is **generic** — the clients are storage adapters and must not encode domain concepts. Path construction (which directory, which filename) is the responsibility of the caller (the service layer), not the client.
-
-```python
-class StorageClient(Protocol):
-    def upload(self, path: str, data: bytes) -> bool: ...
-    def get_url(self, path: str) -> str: ...
-    def delete(self, path: str) -> bool: ...
-```
-
-Services construct paths using hardcoded directory prefixes (e.g. `"adventure-audio/"`, `"audio/"`). These are constants, not environment variables — they are not environment-specific and do not belong in config.
-
-### Factory and instantiation
-
-A factory function reads `STORAGE_PROVIDER` and returns the appropriate `StorageClient` implementation. The client is instantiated **once at app startup** (e.g. in `main.py`) as a module-level singleton — not per-request. This is consistent with how other outbound clients (`AnthropicClient`, `GeminiClient`, etc.) are handled.
-
-### Bunny configuration
-
-Bunny requires the following environment variables:
-
-- `BUNNY_ZONE` — the storage zone name (the zone `languagelearningapp` has been created in the Bunny UI). No "DEFAULT" suffix; there is one zone.
-- `BUNNY_API_KEY` — the Bunny API key for upload/delete operations.
-- `BUNNY_CDN_BASE_URL` — the public CDN hostname used to construct delivery URLs.
-
-### Signed vs. public URLs
-
-Audio files are user-specific (i.e. one user should not be able to use another user's audio URL), Bunny signed URLs are required. Public CDN URLs are shareable by anyone who has the link.
-
-As per Bunny's own documentation they recommend the token.py package:
-
-```py
-from token import sign_url
-
-url = sign_url(
-    "https://myzone.b-cdn.net/videos/stream1/playlist.m3u8",
-    "your-security-key",
-    expiration_time=3600,
-    is_directory=True,
-    path_allowed="/videos/stream1/",
-    countries_allowed="GB",
-)
-```
-
-`get_url(path)` on the `BunnyClient` must generate a time-limited (pick a sensible default for audio content here) signed URL using the Bunny Token Authentication feature. The MinIO implementation would use pre-signed S3 URLs for consistency.
-
-Create a sibling method that explicitely creates public URLs for any future public content, call this `get_public_url`.
-
-### Misc
-
-`pcm_to_wav()` currently lives in `api/app/storage.py` but is a Gemini output concern. Move it to the Gemini client module (`api/app/outbound/gemini/`) when carrying out this refactor.

api/docs/technical-doc-choose-your-own-adventure.md

@@ -146,6 +146,7 @@ def parse_llm_response(text: str) -> tuple[str, list[tuple[str, str]], str]:
 app/domain/models/adventure.py
 app/domain/services/adventure_service.py
 app/routers/api/adventures.py
+app/routers/bff/adventures.py
 app/outbound/postgres/entities/adventure_entities.py
 app/outbound/postgres/repositories/adventure_repository.py
 alembic/versions/20260503_0016_add_choose_your_own_adventure.py
@@ -157,6 +158,7 @@ Modified files:
 ```
 app/outbound/anthropic/anthropic_client.py  (add 2 methods)
 app/routers/api/main.py                     (register router)
+app/routers/bff/main.py                     (register router)
 ```
 
 ---

docker-compose-dev.yml

@@ -1,80 +0,0 @@
-services:
-  db:
-    image: postgres:16-alpine
-    environment:
-      POSTGRES_USER: ${POSTGRES_USER:-langlearn}
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
-      POSTGRES_DB: ${POSTGRES_DB:-langlearn}
-    volumes:
-      - pgdata:/var/lib/postgresql/data
-    ports:
-      - "5432:5432"
-    healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER:-langlearn}"]
-      interval: 5s
-      timeout: 5s
-      retries: 10
-
-  storage:
-    image: minio/minio:latest
-    command: server /data --console-address ":9001"
-    environment:
-      MINIO_ROOT_USER: ${STORAGE_ACCESS_KEY:-langlearn}
-      MINIO_ROOT_PASSWORD: ${STORAGE_SECRET_KEY}
-    ports:
-      - "9000:9000"
-      - "9001:9001"
-    volumes:
-      - storagedata:/data
-    healthcheck:
-      test: ["CMD-SHELL", "curl -sf http://localhost:9000/minio/health/live || exit 1"]
-      interval: 5s
-      timeout: 5s
-      retries: 10
-
-  api:
-    build: ./api
-    volumes: 
-      - ./api:/app:z
-    ports:
-      - "${API_PORT:-8000}:8000"
-    command: uvicorn app.main:app --host 0.0.0.0 --port 8000 --reload
-    environment:
-      DATABASE_URL: postgresql+asyncpg://${POSTGRES_USER:-langlearn}:${POSTGRES_PASSWORD}@db:5432/${POSTGRES_DB:-langlearn}
-      ADMIN_USER_EMAILS: ${ADMIN_USER_EMAILS:-wilson@thomaswilson.xyz}
-      API_BASE_URL: ${API_BASE_URL:-http://localhost:8000}
-      JWT_SECRET: ${JWT_SECRET}
-      ANTHROPIC_API_KEY: ${ANTHROPIC_API_KEY}
-      DEEPL_API_KEY: ${DEEPL_API_KEY}
-      DEEPGRAM_API_KEY: ${DEEPGRAM_API_KEY}
-      GEMINI_API_KEY: ${GEMINI_API_KEY}
-      PYTHONPATH: /app
-      STORAGE_PROVIDER: local
-      STORAGE_ENDPOINT_URL: http://storage:9000
-      STORAGE_ACCESS_KEY: ${STORAGE_ACCESS_KEY:-langlearn}
-      STORAGE_SECRET_KEY: ${STORAGE_SECRET_KEY}
-      STORAGE_BUCKET: ${STORAGE_BUCKET:-langlearn}
-      TRANSACTIONAL_EMAIL_PROVIDER: ${TRANSACTIONAL_EMAIL_PROVIDER:-stub}
-    depends_on:
-      db:
-        condition: service_healthy
-      storage:
-        condition: service_healthy
-    restart: unless-stopped
-
-  frontend:
-    build:
-      context: ./frontend
-      args:
-        PUBLIC_API_BASE_URL: ${PUBLIC_API_BASE_URL:-http://localhost:8000}
-    ports:
-      - "${FRONTEND_PORT:-3000}:3000"
-    environment:
-      ORIGIN: ${ORIGIN:-http://localhost:3000}
-    depends_on:
-      - api
-    restart: unless-stopped
-
-volumes:
-  pgdata:
-  storagedata:

docker-compose-prod.yml

@@ -1,83 +0,0 @@
-services:
-  db:
-    image: postgres:16-alpine
-    environment:
-      POSTGRES_USER: ${POSTGRES_USER:-langlearn}
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
-      POSTGRES_DB: ${POSTGRES_DB:-langlearn}
-    volumes:
-      - pgdata:/var/lib/postgresql/data
-    healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER:-langlearn}"]
-      interval: 10s
-      timeout: 5s
-      retries: 10
-    restart: unless-stopped
-    deploy:
-      resources:
-        limits:
-          cpus: '1'
-          memory: 1G
-
-  api:
-    build: ./api
-    ports:
-      - "${API_PORT:-8000}:8000"
-    command: uvicorn app.main:app --host 0.0.0.0 --port 8000 --workers 2
-    environment:
-      DATABASE_URL: postgresql+asyncpg://${POSTGRES_USER:-langlearn}:${POSTGRES_PASSWORD}@db:5432/${POSTGRES_DB:-langlearn}
-      ADMIN_USER_EMAILS: ${ADMIN_USER_EMAILS}
-      API_BASE_URL: ${API_BASE_URL}
-      JWT_SECRET: ${JWT_SECRET}
-      ANTHROPIC_API_KEY: ${ANTHROPIC_API_KEY}
-      DEEPL_API_KEY: ${DEEPL_API_KEY}
-      DEEPGRAM_API_KEY: ${DEEPGRAM_API_KEY}
-      GEMINI_API_KEY: ${GEMINI_API_KEY}
-      PYTHONPATH: /app
-      STORAGE_PROVIDER: bunny
-      BUNNY_ZONE: ${BUNNY_ZONE}
-      BUNNY_API_KEY: ${BUNNY_API_KEY}
-      BUNNY_CDN_BASE_URL: ${BUNNY_CDN_BASE_URL}
-      BUNNY_TOKEN_AUTH_KEY: ${BUNNY_TOKEN_AUTH_KEY}
-      TRANSACTIONAL_EMAIL_PROVIDER: ${TRANSACTIONAL_EMAIL_PROVIDER}
-    healthcheck:
-      test: ["CMD-SHELL", "curl -sf http://localhost:8000/health || exit 1"]
-      interval: 10s
-      timeout: 5s
-      retries: 10
-      start_period: 20s
-    depends_on:
-      db:
-        condition: service_healthy
-    restart: unless-stopped
-    deploy:
-      resources:
-        limits:
-          cpus: '1'
-          memory: 1G
-
-  frontend:
-    build:
-      context: ./frontend
-      args:
-        PUBLIC_API_BASE_URL: ${PUBLIC_API_BASE_URL}
-    ports:
-      - "${FRONTEND_PORT:-3000}:3000"
-    environment:
-      ORIGIN: ${ORIGIN}
-    depends_on:
-      api:
-        condition: service_healthy
-    restart: unless-stopped
-    deploy:
-      resources:
-        limits:
-          cpus: '0.5'
-          memory: 256M
-
-volumes:
-  pgdata:
-
-networks:
-  default:
-    name: langlearn

frontend/src/routes/app/adventures/[id]/+page.svelte

@@ -299,7 +299,6 @@
 		<LatestEntry
 			sourceText={latestEntry?.story_text}
 			translationText={latestEntry?.translation}
-			storyTextLinguisticData={latestEntry?.story_text_linguistic_data}
 			audioUrl={latestEntry?.audio_url}
 			onSelectNextStep={handleNextStepSelect}
 			isWaitingForGeneration={$adventureState.ui.isWaitingForGeneration}

frontend/src/routes/app/adventures/[id]/LatestEntry.svelte

@@ -6,7 +6,6 @@
 	type Props = {
 		sourceText: string | null | undefined;
 		translationText: string | null | undefined;
-		storyTextLinguisticData: Record<string, unknown> | null | undefined;
 		audioUrl: string | null | undefined;
 
 		onSelectNextStep: (optionId: string) => Promise<void>;
@@ -25,7 +24,6 @@
 	const {
 		sourceText,
 		translationText,
-		storyTextLinguisticData,
 		audioUrl,
 
 		onSelectNextStep,
@@ -35,222 +33,10 @@
 		errorMessage
 	}: Props = $props();
 
-	type LinguisticToken = {
-		text: string;
-		lemma: string | null;
-		pos: string | null;
-	};
+	const sourceParagraphs = $derived.by(() => toParagraphs(sourceText));
+	const translationParagraphs = $derived.by(() => toParagraphs(translationText));
 
-	type TextSegment = {
-		kind: 'text';
-		text: string;
-	};
-
-	type WordSegment = {
-		kind: 'word';
-		text: string;
-		lemma: string | null;
-		pos: string | null;
-	};
-
-	type SentenceSegments = {
-		key: string;
-		sourceText: string;
-		targetText: string;
-		sourceSegments: Array<TextSegment | WordSegment>;
-		targetSegments: Array<TextSegment | WordSegment>;
-	};
-
-	type LinguisticParagraph = {
-		key: string;
-		sourceText: string;
-		targetText: string;
-		sentences: SentenceSegments[];
-	};
-
-	function isRecord(value: unknown): value is Record<string, unknown> {
-		return typeof value === 'object' && value !== null;
-	}
-
-	function asString(value: unknown): string | null {
-		return typeof value === 'string' ? value : null;
-	}
-
-	function parseTokens(value: unknown): LinguisticToken[] {
-		if (!Array.isArray(value)) {
-			return [];
-		}
-
-		return value
-			.map((token): LinguisticToken | null => {
-				if (!isRecord(token)) {
-					return null;
-				}
-
-				const text = asString(token.text);
-				if (!text) {
-					return null;
-				}
-
-				return {
-					text,
-					lemma: asString(token.lemma),
-					pos: asString(token.pos)
-				};
-			})
-			.filter((token): token is LinguisticToken => token !== null);
-	}
-
-	function buildSegments(
-		text: string,
-		tokens: LinguisticToken[]
-	): Array<TextSegment | WordSegment> {
-		if (tokens.length === 0) {
-			return text ? [{ kind: 'text', text }] : [];
-		}
-
-		if (!text) {
-			return tokens.flatMap((token, index) => [
-				{ kind: 'word', text: token.text, lemma: token.lemma, pos: token.pos } as WordSegment,
-				...(index < tokens.length - 1 ? ([{ kind: 'text', text: ' ' }] as TextSegment[]) : [])
-			]);
-		}
-
-		const segments: Array<TextSegment | WordSegment> = [];
-		let cursor = 0;
-
-		for (const token of tokens) {
-			const tokenIndex = text.indexOf(token.text, cursor);
-
-			if (tokenIndex === -1) {
-				continue;
-			}
-
-			if (tokenIndex > cursor) {
-				segments.push({
-					kind: 'text',
-					text: text.slice(cursor, tokenIndex)
-				});
-			}
-
-			segments.push({
-				kind: 'word',
-				text: token.text,
-				lemma: token.lemma,
-				pos: token.pos
-			});
-
-			cursor = tokenIndex + token.text.length;
-		}
-
-		if (cursor < text.length) {
-			segments.push({
-				kind: 'text',
-				text: text.slice(cursor)
-			});
-		}
-
-		return segments.length > 0 ? segments : [{ kind: 'text', text }];
-	}
-
-	function parseLinguisticParagraphs(
-		value: Record<string, unknown> | null | undefined
-	): LinguisticParagraph[] {
-		if (!value) {
-			return [];
-		}
-
-		const paragraphs = value.paragraphs;
-		if (!Array.isArray(paragraphs)) {
-			return [];
-		}
-
-		return paragraphs
-			.map((paragraphValue, paragraphIndex): LinguisticParagraph | null => {
-				if (!isRecord(paragraphValue)) {
-					return null;
-				}
-
-				const sentencesRaw = paragraphValue.sentences;
-				const sentenceValues = Array.isArray(sentencesRaw) ? sentencesRaw : [];
-
-				const sentences = sentenceValues
-					.map((sentenceValue, sentenceIndex): SentenceSegments | null => {
-						if (!isRecord(sentenceValue)) {
-							return null;
-						}
-
-						const sourceSentence = asString(sentenceValue.source_text) ?? '';
-						const targetSentence = asString(sentenceValue.target_text) ?? '';
-						const sourceTokens = parseTokens(sentenceValue.source_tokens);
-						const targetTokens = parseTokens(sentenceValue.target_tokens);
-
-						return {
-							key: `${paragraphIndex}-${sentenceIndex}`,
-							sourceText: sourceSentence,
-							targetText: targetSentence,
-							sourceSegments: buildSegments(sourceSentence, sourceTokens),
-							targetSegments: buildSegments(targetSentence, targetTokens)
-						};
-					})
-					.filter((sentence): sentence is SentenceSegments => sentence !== null);
-
-				const sourceText =
-					asString(paragraphValue.source_text) ??
-					sentences
-						.map((sentence) => sentence.sourceText)
-						.filter(Boolean)
-						.join(' ');
-				const targetText =
-					asString(paragraphValue.target_text) ??
-					sentences
-						.map((sentence) => sentence.targetText)
-						.filter(Boolean)
-						.join(' ');
-
-				if (sentences.length === 0 && (sourceText || targetText)) {
-					sentences.push({
-						key: `${paragraphIndex}-0`,
-						sourceText,
-						targetText,
-						sourceSegments: sourceText ? [{ kind: 'text', text: sourceText }] : [],
-						targetSegments: targetText ? [{ kind: 'text', text: targetText }] : []
-					});
-				}
-
-				if (!sourceText && !targetText && sentences.length === 0) {
-					return null;
-				}
-
-				return {
-					key: `p-${paragraphIndex}`,
-					sourceText,
-					targetText,
-					sentences
-				};
-			})
-			.filter((paragraph): paragraph is LinguisticParagraph => paragraph !== null);
-	}
-
-	function isWordLike(text: string): boolean {
-		return /[\p{L}\p{N}]/u.test(text);
-	}
-
-	const linguisticParagraphs = $derived.by(() =>
-		parseLinguisticParagraphs(storyTextLinguisticData)
-	);
-	const sourceParagraphs = $derived.by(() =>
-		linguisticParagraphs.length > 0
-			? linguisticParagraphs.map((paragraph) => paragraph.targetText).filter(Boolean)
-			: toParagraphs(sourceText)
-	);
-	const translationParagraphs = $derived.by(() =>
-		linguisticParagraphs.length > 0
-			? linguisticParagraphs.map((paragraph) => paragraph.sourceText).filter(Boolean)
-			: toParagraphs(translationText)
-	);
-
-	let selectedWord: { sentenceKey: string; text: string } | null = $state(null);
+	let lastClickedParagraphIndex: number | null = $state(null);
 	let sourcePane = $state<HTMLDivElement | undefined>();
 	let translationPane = $state<HTMLDivElement | undefined>();
 	let suppressSourceScroll = $state(false);
@@ -315,9 +101,8 @@
 		}, 20000);
 	}
 
-	function handleWordClicked(sentenceKey: string, text: string) {
-		selectedWord = { sentenceKey, text };
-		showTranslation();
+	function handleParagraphClicked(paragraphIndex: number) {
+		lastClickedParagraphIndex = paragraphIndex;
 	}
 
 	async function handleNextStepSelect(optionId: string) {
@@ -361,45 +146,18 @@
 			<div class="pane source-pane">
 				<div class="latest-entry__pane-body" bind:this={sourcePane} onscroll={handleSourceScroll}>
 					{#if sourceParagraphs.length > 0}
-						{#if linguisticParagraphs.length > 0}
-							{#each linguisticParagraphs as paragraph (paragraph.key)}
-								<p class="paragraph paragraph--text" data-language="source">
-									{#each paragraph.sentences as sentence (sentence.key)}
-										<span
-											class="sentence-chunk"
-											class:active-sentence={selectedWord?.sentenceKey === sentence.key}
-										>
-											{#each sentence.targetSegments as segment, segmentIndex (`${sentence.key}-target-${segmentIndex}`)}
-												{#if segment.kind === 'word' && isWordLike(segment.text)}
+						{#each sourceParagraphs as paragraph, index (index)}
 							<button
 								type="button"
-														class="word-token"
-														class:active={selectedWord?.sentenceKey === sentence.key &&
-															selectedWord?.text === segment.text}
-														title={segment.lemma ? `Lemma: ${segment.lemma}` : undefined}
-														onclick={() => handleWordClicked(sentence.key, segment.text)}
-													>
-														{segment.text}
-													</button>
-												{:else}
-													<span>{segment.text}</span>
-												{/if}
-											{/each}
-										</span>
-									{/each}
-								</p>
-							{/each}
-						{:else}
-							{#each sourceParagraphs as paragraph, index (index)}
-								<p
-									class="paragraph paragraph--text"
+								class="paragraph"
+								class:active={lastClickedParagraphIndex === index}
 								data-paragraph-index={index}
 								data-language="source"
+								onclick={() => handleParagraphClicked(index)}
 							>
 								{paragraph}
-								</p>
+							</button>
 						{/each}
-						{/if}
 					{:else}
 						<div class="loading-block" role="status" aria-live="polite">
 							<p class="loading-block__label">{statusMessage || 'Writing your next entry...'}</p>
@@ -419,12 +177,6 @@
 					</button>
 				</header>
 
-				{#if selectedWord}
-					<p class="translation-selected-word" role="status" aria-live="polite">
-						Selected word: <strong>{selectedWord.text}</strong>
-					</p>
-				{/if}
-
 				{#if translationVisible}
 					<div
 						class="latest-entry__pane-body"
@@ -432,42 +184,18 @@
 						onscroll={handleTranslationScroll}
 					>
 						{#if translationParagraphs.length > 0}
-							{#if linguisticParagraphs.length > 0}
-								{#each linguisticParagraphs as paragraph (paragraph.key)}
-									<p class="paragraph paragraph--text" data-language="translation">
-										{#each paragraph.sentences as sentence (sentence.key)}
-											<span
-												class="sentence-chunk"
-												class:active-sentence={selectedWord?.sentenceKey === sentence.key}
-											>
-												{#each sentence.sourceSegments as segment, segmentIndex (`${sentence.key}-source-${segmentIndex}`)}
-													{#if segment.kind === 'word'}
-														<span
-															class="word-token word-token--passive"
-															class:active={selectedWord?.sentenceKey === sentence.key &&
-																selectedWord?.text === segment.text}
-														>
-															{segment.text}
-														</span>
-													{:else}
-														<span>{segment.text}</span>
-													{/if}
-												{/each}
-											</span>
-										{/each}
-									</p>
-								{/each}
-							{:else}
 							{#each translationParagraphs as paragraph, index (index)}
-									<p
-										class="paragraph paragraph--text"
+								<button
+									type="button"
+									class="paragraph"
+									class:active={lastClickedParagraphIndex === index}
 									data-paragraph-index={index}
 									data-language="translation"
+									onclick={() => handleParagraphClicked(index)}
 								>
 									{paragraph}
-									</p>
+								</button>
 							{/each}
-							{/if}
 						{:else}
 							<div class="loading-block" role="status" aria-live="polite">
 								<p class="loading-block__label">
@@ -783,18 +511,6 @@
 		color: color-mix(in srgb, var(--color-on-surface) 72%, transparent);
 	}
 
-	.translation-selected-word {
-		margin: 0;
-		padding: 0 var(--latest-entry-pane-padding) var(--space-2);
-		font-size: var(--text-label-md);
-		color: color-mix(in srgb, var(--color-on-surface) 84%, transparent);
-	}
-
-	.translation-selected-word strong {
-		font-weight: var(--weight-semibold);
-		color: var(--color-primary);
-	}
-
 	.latest-entry__pane-body::-webkit-scrollbar {
 		width: 0.75rem;
 	}
@@ -826,58 +542,9 @@
 		transition: background-color var(--duration-fast) var(--ease-standard);
 	}
 
-	.paragraph--text {
-		margin: 0;
-		padding: 0;
-		border: none;
-		background: transparent;
-		cursor: default;
-		white-space: pre-wrap;
-	}
-
-	.sentence-chunk {
-		display: inline;
-		border-radius: var(--radius-sm);
-		transition: background-color var(--duration-fast) var(--ease-standard);
-
-		&::after {
-			content: '';
-			display: inline-block;
-			width: 0.85ch;
-		}
-	}
-
-	.sentence-chunk.active-sentence {
-		background-color: color-mix(in srgb, var(--color-primary-container) 32%, transparent);
-	}
-
-	.word-token {
-		display: inline;
-		padding: 0;
-		margin: 0;
-		border: none;
-		background: transparent;
-		color: inherit;
-		font: inherit;
-		line-height: inherit;
-		cursor: pointer;
-	}
-
-	.word-token:hover {
-		text-decoration: underline;
-	}
-
-	.word-token.active {
-		color: var(--color-primary);
-		text-decoration: underline;
-	}
-
-	.word-token--passive {
-		cursor: default;
-	}
-
-	.word-token--passive:hover {
-		text-decoration: none;
+	.paragraph.active {
+		background-color: color-mix(in srgb, var(--color-primary-container) 56%, transparent);
+		border-radius: var(--radius-md);
 	}
 
 	.paragraph:focus-visible {

frontend/src/routes/app/adventures/[id]/adventureState.ts

@@ -4,7 +4,6 @@ export type AdventureEntry = {
 	id: string;
 	story_text: string | null;
 	translation: string | null;
-	story_text_linguistic_data: Record<string, unknown> | null;
 	audio_url: string | null;
 	generated_from_choice_id: string | null;
 	possible_choices: { id: string; text: string }[] | null;