Rs product compatibility tab - #3

Introduce application initialization and a client-side caching layer for common option data. Adds AppInitializerService, InitialDataLoader, IndexedDbService, AppCacheService and AppChannelService (cross-tab sync), plus SessionStorageService. Implement generic stores (OptionCacheStore, PaginatedCacheStore) and concrete stores for categories, manufacturers, OEM codes, part origins, statuses, unit-sales and warehouses. Add ProductByIdService, query utilities (createDefaultQuery/isSameQuery), many new/updated models (GeneralOption, query pagination fields, cache models) and adjust services/components to use the new stores and types. Remove legacy warehouses service and add paginationInitialData helper. Purpose: consolidate option loading, enable persistent caching and deduplicate initial API calls.

Replace loadInitialOptions with hydrate() and improve OptionCacheStore (async API loads, query handling, cache subscription and clear). Comment initial loader calls and update AppInitializer to use hydrate. Normalize warehouse option mapping. Simplify compatibility tab imports and remove unused OnChanges. Move/clean basic-info section markup. Large refactor of inventory tab (HTML + TS): introduce local signal state, computed helpers, add/remove warehouse flow with restore-from-cache, inline editing, toggles, improved layout/styling and footer docs; remove tableHeaders dependency. Remove stray debug logs in sidebar and workspace.

Adds tracking for tabs modified in the product workspace and uses that state to build a partial update payload instead of sending the full form on save. This keeps updates scoped to the edited sections, resets the dirty state after a successful save, and avoids overwriting untouched product data.