Merge PR #1300: tailscale Windows fix, quota pagination, SSE abort handling

- fix(tunnel): cross-platform tailscale probes without shell redirection
- feat(usage): paginate provider limits with page size controls
- feat(providers): stop control for one-by-one connection testing
- fix(sse): close stream gracefully on abort/disconnect instead of pipe errors
- ui(quota): simplify header, always show pagination in one row

Co-authored-by: philau2512 <dplau25122002@gmail.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

open-sse/utils/streamHandler.js

@@ -113,10 +113,22 @@ export function createDisconnectAwareStream(transformStream, streamController) {
         }
         controller.enqueue(value);
       } catch (error) {
+        const wasConnected = streamController.isConnected();
         streamController.handleError(error);
         reader.cancel().catch(() => {});
         writer.abort().catch(() => {});
-        controller.error(error);
+        
+        if (!wasConnected || error.name === "AbortError" || error.message?.includes("aborted")) {
+          try {
+            controller.close();
+          } catch (e) {
+            // Stream might already be closed or cancelled
+          }
+        } else {
+          try {
+            controller.error(error);
+          } catch (e) { /* already closed */ }
+        }
       }
     },