Added a theme selector

backend/app/api/admin.py

@@ -19,6 +19,7 @@ from backend.app.services.email_service import (
     smtp_configured,
 )
 from backend.app.services.email_verification import create_verification_token
+from backend.app.services.theme_service import THEMES, get_enabled_themes, save_enabled_themes
 from backend.app.core.config import settings
 
 router = APIRouter()
@@ -49,6 +50,10 @@ class AdminSmtpUpdate(BaseModel):
     smtp_use_tls: bool = True
 
 
+class AdminThemesUpdate(BaseModel):
+    themes: list[str]
+
+
 def validate_smtp_values(payload: AdminSmtpUpdate, current: dict | None = None) -> dict:
     smtp_host = payload.smtp_host.strip()
     smtp_from = payload.smtp_from.strip()
@@ -139,6 +144,20 @@ def get_admin_smtp_settings(_: dict = Depends(require_admin)):
     return public_smtp_settings(get_smtp_settings())
 
 
+@router.get('/themes')
+def get_admin_themes(_: dict = Depends(require_admin)):
+    return {'themes': THEMES, 'enabled': get_enabled_themes()}
+
+
+@router.put('/themes')
+def update_admin_themes(payload: AdminThemesUpdate, _: dict = Depends(require_admin)):
+    try:
+        enabled = save_enabled_themes(payload.themes)
+    except ValueError as error:
+        raise HTTPException(status_code=422, detail=str(error)) from error
+    return {'themes': THEMES, 'enabled': enabled}
+
+
 @router.put('/smtp')
 def update_admin_smtp_settings(payload: AdminSmtpUpdate, _: dict = Depends(require_admin)):
     current = get_smtp_settings()

backend/app/api/public.py

@@ -6,6 +6,7 @@ from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
 
 from backend.app.services.link_service import list_public_links, list_public_users
 from backend.app.services.token_service import validate_token
+from backend.app.services.theme_service import THEMES, get_enabled_themes
 
 router = APIRouter()
 optional_bearer = HTTPBearer(auto_error=False)
@@ -16,6 +17,12 @@ def public_users():
     return list_public_users()
 
 
+@router.get('/themes')
+def public_themes():
+    enabled = get_enabled_themes()
+    return [{'id': theme, **THEMES[theme]} for theme in enabled]
+
+
 @router.get('/feed')
 @router.get('/feed/{username}')
 def public_feed(