feat: improve connector popup with grouped OAuth connectors

Active Connectors tab:
- Group OAuth connectors by type (Gmail, Google Drive, etc.)
- Show account count badge on grouped cards
- Show most recent last indexed date across all accounts
- Show non-OAuth connectors individually with active task messages

All Connectors tab:
- Show most recent last indexed date for OAuth connector types
- Check if any account is indexing for OAuth types

Accounts List View:
- Remove document count from individual account cards
- Back button returns to previous tab (not always All Connectors)

General:
- Update handleViewAccountsList to use (connectorType, connectorTitle) signature
- Consistent behavior for viewing accounts from both tabs

surfsense_web/components/assistant-ui/connector-popup.tsx

@@ -205,7 +205,6 @@ export const ConnectorIndicator: FC = () => {
 						connectors={(allConnectors || []) as SearchSourceConnector[]}
 						indexingConnectorIds={indexingConnectorIds}
 						logsSummary={logsSummary}
-						documentTypeCounts={documentTypeCounts}
 						onBack={handleBackFromAccountsList}
 						onManage={handleStartEdit}
 						onAddAccount={() => {
@@ -317,18 +316,19 @@ export const ConnectorIndicator: FC = () => {
 										/>
 									</TabsContent>
 
-									<ActiveConnectorsTab
-										searchQuery={searchQuery}
-										hasSources={hasSources}
-										totalSourceCount={totalSourceCount}
-										activeDocumentTypes={activeDocumentTypes}
-										connectors={connectors as SearchSourceConnector[]}
-										indexingConnectorIds={indexingConnectorIds}
-										logsSummary={logsSummary}
-										searchSpaceId={searchSpaceId}
-										onTabChange={handleTabChange}
-										onManage={handleStartEdit}
-									/>
+								<ActiveConnectorsTab
+									searchQuery={searchQuery}
+									hasSources={hasSources}
+									totalSourceCount={totalSourceCount}
+									activeDocumentTypes={activeDocumentTypes}
+									connectors={connectors as SearchSourceConnector[]}
+									indexingConnectorIds={indexingConnectorIds}
+									logsSummary={logsSummary}
+									searchSpaceId={searchSpaceId}
+									onTabChange={handleTabChange}
+									onManage={handleStartEdit}
+									onViewAccountsList={handleViewAccountsList}
+								/>
 								</div>
 							</div>
 							{/* Bottom fade shadow */}