Introduce a centralized Zustand store and refactor app state out of App.tsx into src/store/appStore.ts. Modularize API surface by moving media/cast/settings/converters/types into src/lib/api/* and re-exporting from src/api.ts for backward compatibility. Replace inline route helpers with dedicated route components (MediaDetailRoute, CastDetailRoute, CategoryBrowseRoute) and wire CATEGORY_PATHS/PATH_TO_CATEGORY constants. Update AddMediaView UI (icons, layout) and adjust settings/category handling to use DEFAULT_SETTINGS and the store. Add zustand to package.json/package-lock.json and include a new React SKILL.md. Overall changes improve state management, API organization, and route/component separation for better maintainability and code-splitting.
Introduce an updateExisting flag across importers and the Importer UI to control whether existing items should be updated or only new items imported. Changes: added updateExisting to XBVR, StashAPP, Playnite, and Jellyfin config types; added checkboxes in ImporterView (enabled by default) to toggle the behavior; import logic now skips existing items when updateExisting is false and logs/skips appropriately (XBVR, StashAPP, Playnite, Jellyfin). Also: minor Playnite env parsing tweak for port (undefined when not provided) and small logging/cleanup in the Jellyfin album handling.
Introduce a 'source' property across types and API models, include it in convertApiToMedia, and add a Source input to AddMediaView. Add source-based filtering in BrowseView (dropdown + tag icon) and ensure Clear Filters resets source. Update playnite, stashapp, and xbvr importers to set source conditionally using a new SOURCE_CATEGORY_MAPPING constant (added to types) so sources are only applied for appropriate media categories.
