feat: donation banner, About tab, settings UI improvements

- Dismissible donation/open-source banner after 3+ sessions (30-day snooze)
- New About tab in Settings: version, repo link, license info
- Centralize project URLs (REPO_URL, DONATE_URL) in __init__.py, served via /health
- Center settings tab bar, reduce tab padding for 6-tab fit
- External URL save button: icon button instead of full-width text button
- Remove redundant settings footer close button
- Footer "Source Code" link replaced with "About" opening settings
- i18n keys for en/ru/zh

server/src/wled_controller/main.py

@@ -12,11 +12,14 @@ from fastapi.staticfiles import StaticFiles
 from fastapi.templating import Jinja2Templates
 from starlette.requests import Request
 
-from wled_controller import __version__
+from wled_controller import __version__, GITEA_BASE_URL, GITEA_REPO
 from wled_controller.api import router
 from wled_controller.api.dependencies import init_dependencies
 from wled_controller.config import get_config
-from wled_controller.core.processing.processor_manager import ProcessorDependencies, ProcessorManager
+from wled_controller.core.processing.processor_manager import (
+    ProcessorDependencies,
+    ProcessorManager,
+)
 from wled_controller.storage import DeviceStore
 from wled_controller.storage.template_store import TemplateStore
 from wled_controller.storage.postprocessing_template_store import PostprocessingTemplateStore
@@ -31,7 +34,9 @@ from wled_controller.storage.value_source_store import ValueSourceStore
 from wled_controller.storage.automation_store import AutomationStore
 from wled_controller.storage.scene_preset_store import ScenePresetStore
 from wled_controller.storage.sync_clock_store import SyncClockStore
-from wled_controller.storage.color_strip_processing_template_store import ColorStripProcessingTemplateStore
+from wled_controller.storage.color_strip_processing_template_store import (
+    ColorStripProcessingTemplateStore,
+)
 from wled_controller.storage.gradient_store import GradientStore
 from wled_controller.storage.weather_source_store import WeatherSourceStore
 from wled_controller.storage.asset_store import AssetStore
@@ -61,6 +66,7 @@ db = Database(config.storage.database_file)
 # Seed demo data after DB is ready (first-run only)
 if config.demo:
     from wled_controller.core.demo_seed import seed_demo_data
+
     seed_demo_data(db)
 
 # Initialize storage and processing
@@ -148,7 +154,8 @@ async def lifespan(app: FastAPI):
 
     # Create automation engine (needs processor_manager + mqtt_service + stores for scene activation)
     automation_engine = AutomationEngine(
-        automation_store, processor_manager,
+        automation_store,
+        processor_manager,
         mqtt_service=mqtt_service,
         scene_preset_store=scene_preset_store,
         target_store=output_target_store,
@@ -165,8 +172,8 @@ async def lifespan(app: FastAPI):
 
     # Create update service (checks for new releases)
     _release_provider = GiteaReleaseProvider(
-        base_url="https://git.dolgolyov-family.by",
-        repo="alexei.dolgolyov/wled-screen-controller-mixed",
+        base_url=GITEA_BASE_URL,
+        repo=GITEA_REPO,
     )
     update_service = UpdateService(
         provider=_release_provider,
@@ -177,7 +184,9 @@ async def lifespan(app: FastAPI):
 
     # Initialize API dependencies
     init_dependencies(
-        device_store, template_store, processor_manager,
+        device_store,
+        template_store,
+        processor_manager,
         database=db,
         pp_template_store=pp_template_store,
         pattern_template_store=pattern_template_store,
@@ -309,6 +318,7 @@ async def lifespan(app: FastAPI):
     except Exception as e:
         logger.error(f"Error stopping MQTT service: {e}")
 
+
 # Create FastAPI application
 app = FastAPI(
     title="LED Grab",
@@ -363,6 +373,7 @@ async def _no_cache_static(request: Request, call_next):
         return response
     return await call_next(request)
 
+
 # Mount static files
 static_path = Path(__file__).parent / "static"
 if static_path.exists():