Refine Media Manager Save Logic and UI

- Add failing global function verification test (GlobalFunctions.test.ts) and fix missing exports in global.ts.
- Refactor MediaManager.html UI:
    - Implement 
enderPlanHtml to standardize Plan (Details) and Execution views.
    - Show 'Skipped' state for empty save phases.
    - Visually decouple 'Sheet Update' from 'Reorder' phase.
    - Separate 'Manual Link' operations into their own 'Linking' section in the plan view, distinct from Adoptions.
    - Fix TypeErrors in 
enderPlanHtml (undefined actions) and 
enderMatch (missing DOM elements).
- Update MediaService.test.ts to match new filename constraints on reorder.
- Update mediaHandlers.test.ts to correctly spy on loose MediaService instances.
- Ensure all tests pass.

src/services/GASNetworkService.ts

@@ -4,4 +4,8 @@ export class GASNetworkService implements INetworkService {
   fetch(url: string, params: GoogleAppsScript.URL_Fetch.URLFetchRequestOptions): GoogleAppsScript.URL_Fetch.HTTPResponse {
     return UrlFetchApp.fetch(url, params)
   }
+
+  fetchAll(requests: (string | GoogleAppsScript.URL_Fetch.URLFetchRequest)[]): GoogleAppsScript.URL_Fetch.HTTPResponse[] {
+    return UrlFetchApp.fetchAll(requests);
+  }
 }