Introduce series management functionality and repository updates

- Added `series-world.repo.ts` to handle database operations related to series worlds and their elements.
- Implemented `series-sync.repo.ts` for managing synchronization between books and series.
- Expanded `spell.ipc.ts` data models to include `seriesSpellId` for spell synchronization.
- Refactored `insertSpellTag` method in `spelltag.repo.ts` for improved error handling and logic clarity.

electron/ipc/location.ipc.ts

@@ -12,6 +12,7 @@ interface AddLocationSectionData {
     locationName: string;
     bookId: string;
     id?: string;
+    seriesLocationId?: string | null;
 }
 
 interface AddLocationElementData {
@@ -44,7 +45,7 @@ ipcMain.handle('db:location:all', createHandler<GetAllLocationsData, LocationLis
 // POST /location/section/add - Add location section
 ipcMain.handle('db:location:section:add', createHandler<AddLocationSectionData, string>(
         function(userId: string, data: AddLocationSectionData, lang: 'fr' | 'en'): string {
-            return Location.addLocationSection(userId, data.locationName, data.bookId, lang, data.id);
+            return Location.addLocationSection(userId, data.locationName, data.bookId, lang, data.id, data.seriesLocationId || null);
         }
     )
 );
@@ -73,6 +74,19 @@ ipcMain.handle('db:location:update', createHandler<UpdateLocationData, UpdateLoc
     )
 );
 
+// POST /location/section/update - Update location section with series link
+interface UpdateSectionWithSeriesLinkData {
+    sectionId: string;
+    sectionName?: string;
+    seriesLocationId?: string | null;
+}
+ipcMain.handle('db:location:section:update', createHandler<UpdateSectionWithSeriesLinkData, boolean>(
+        function(userId: string, data: UpdateSectionWithSeriesLinkData, lang: 'fr' | 'en'): boolean {
+            return Location.updateSectionWithSeriesLink(userId, data.sectionId, data.sectionName, data.seriesLocationId, lang);
+        }
+    )
+);
+
 // DELETE /location/delete - Delete location section
 interface DeleteLocationData {
     locationId: string;