refactor: rename relay to plyr.fm (#83)

* refactor(config): rename relay to plyr.fm

- update app name from 'relay' to 'plyr.fm'
- update canonical host to plyr.fm
- update broadcast channel prefix to 'plyr'
- update CORS default regex to include plyr.fm
- update database default URL to plyr
- update atproto namespace from 'app.relay' to 'app.plyr'
- add old_app_namespace field for migration support
- add old_track_collection computed field
- update resolved_scope to include both old and new namespaces when migrating

* chore(infra): update R2 bucket references to generic names

- production: relay → audio-prod
- staging: relay-stg → audio-staging
- update public bucket URLs to new buckets

* chore(frontend): rename wrangler project from relay to plyr

* docs: update project name from relay to plyr in root docs

CLAUDE.md

···
-# relay
+# plyr
 
 music streaming platform on ATProto.
 
···
 ## structure
 
 ```
-relay/
-├── src/relay/
+plyr/
+├── src/backend/
 │   ├── api/          # public endpoints (see api/CLAUDE.md)
 │   ├── _internal/    # internal services (see _internal/CLAUDE.md)
 │   ├── models/       # database schemas

fly.staging.toml

···
 [env]
   ATPROTO_PDS_URL = 'https://pds.zzstoatzz.io'
   PORT = '8000'
-  R2_BUCKET = 'relay-stg'
+  R2_BUCKET = 'audio-staging'
   R2_ENDPOINT_URL = 'https://8feb33b5fb57ce2bc093bc6f4141f40a.r2.cloudflarestorage.com'
-  R2_PUBLIC_BUCKET_URL = 'https://pub-3b2a5274e4f4408cb8b5e0653f300116.r2.dev'
+  R2_PUBLIC_BUCKET_URL = 'https://pub-0a0a2e70496c461581c9fafb442b269d.r2.dev'
   STORAGE_BACKEND = 'r2'
 
 [http_service]

fly.toml

···
 [env]
   PORT = '8000'
   STORAGE_BACKEND = 'r2'
-  R2_BUCKET = 'relay'
+  R2_BUCKET = 'audio-prod'
   R2_ENDPOINT_URL = 'https://8feb33b5fb57ce2bc093bc6f4141f40a.r2.cloudflarestorage.com'
-  R2_PUBLIC_BUCKET_URL = 'https://pub-841ec0f5a7854eaab01292d44aca4820.r2.dev'
+  R2_PUBLIC_BUCKET_URL = 'https://pub-d4ed8a1e39d44dac85263d86ad5676fd.r2.dev'
   ATPROTO_PDS_URL = 'https://pds.zzstoatzz.io'
 
 # secrets to set via: fly secrets set KEY=value

frontend/wrangler.toml

···
-name = "relay"
+name = "plyr"
 compatibility_date = "2024-01-01"
 compatibility_flags = ["nodejs_compat"]
 pages_build_output_dir = ".svelte-kit/cloudflare"

src/backend/config.py

···
     """Core application configuration."""
 
     name: str = Field(
-        default="relay",
+        default="plyr.fm",
         description="Public-facing application name",
     )
     tagline: str = Field(
···
         description="Interval for background tasks in seconds",
     )
     canonical_host: str = Field(
-        default="relay.zzstoatzz.io",
+        default="plyr.fm",
         description="Canonical host used for metadata and share links",
     )
     canonical_url_override: str | None = Field(
···
         description="Override canonical URL if it differs from https://{canonical_host}",
     )
     broadcast_channel_prefix: str = Field(
-        default="relay",
+        default="plyr",
         description="Prefix used for browser BroadcastChannel identifiers",
     )
 
···
     cors_origin_regex: str | None = Field(
         default=None,
         validation_alias="FRONTEND_CORS_ORIGIN_REGEX",
-        description="CORS origin regex pattern (if not set, uses default for relay-4i6.pages.dev)",
+        description="CORS origin regex pattern (if not set, uses default for plyr.fm and relay-4i6.pages.dev)",
     )
 
     @computed_field
···
         if self.cors_origin_regex is not None:
             return self.cors_origin_regex
 
-        # default: allow localhost for dev + cloudflare pages (including preview deployments)
-        return r"^(https://([a-z0-9]+\.)?relay-4i6\.pages\.dev|http://localhost:5173)$"
+        # default: allow localhost for dev + plyr.fm + cloudflare pages (including preview deployments)
+        return r"^(https://(www\.)?plyr\.fm|https://([a-z0-9]+\.)?relay-4i6\.pages\.dev|http://localhost:5173)$"
 
 
 class DatabaseSettings(RelaySettingsSection):
     """Database configuration."""
 
     url: str = Field(
-        default="postgresql+asyncpg://localhost/relay",
+        default="postgresql+asyncpg://localhost/plyr",
         validation_alias="DATABASE_URL",
         description="PostgreSQL connection string",
     )
···
         description="OAuth redirect URI",
     )
     app_namespace: str = Field(
-        default="app.relay",
+        default="app.plyr",
         validation_alias="ATPROTO_APP_NAMESPACE",
         description="ATProto app namespace used for record collections",
     )
+    old_app_namespace: str | None = Field(
+        default=None,
+        validation_alias="ATPROTO_OLD_APP_NAMESPACE",
+        description="Optional previous ATProto namespace for migration (e.g., 'app.relay'). When set, OAuth scopes will include both old and new namespaces.",
+    )
     scope_override: str | None = Field(
         default=None,
         validation_alias="ATPROTO_SCOPE_OVERRIDE",
···
     @computed_field
     @property
     def track_collection(self) -> str:
-        """Collection name for relay audio records."""
+        """Collection name for plyr audio records."""
 
         return f"{self.app_namespace}.track"
 
     @computed_field
     @property
+    def old_track_collection(self) -> str | None:
+        """Collection name for old namespace, if migration is active."""
+
+        if self.old_app_namespace:
+            return f"{self.old_app_namespace}.track"
+        return None
+
+    @computed_field
+    @property
     def resolved_scope(self) -> str:
-        """OAuth scope, falling back to the repo scope for the configured namespace."""
+        """OAuth scope, falling back to the repo scope for the configured namespace(s)."""
 
         if self.scope_override:
             return self.scope_override
+
+        # if we have an old namespace, request access to both collections
+        if self.old_app_namespace:
+            return f"atproto transition:generic repo:{self.track_collection} repo:{self.old_track_collection}"
+
         return f"atproto repo:{self.track_collection}"