feat: better error messages (#20577)

Co-authored-by: Gal Zahavi <38544478+galz10@users.noreply.github.com>
# Conflicts:
#	packages/cli/src/test-utils/render.tsx
#	packages/cli/src/ui/AppContainer.tsx
#	packages/cli/src/ui/contexts/UIActionsContext.tsx
#	packages/core/src/utils/errors.test.ts
#	packages/core/src/utils/errors.ts

packages/cli/src/gemini.test.tsx

@@ -1179,6 +1179,7 @@ describe('startInteractiveUI', () => {
   const mockWorkspaceRoot = '/root';
   const mockInitializationResult = {
     authError: null,
+    accountSuspensionInfo: null,
     themeError: null,
     shouldOpenAuthDialog: false,
     geminiMdFileCount: 0,