fix: connector issues (#12308)

Fixes [BS-3161](https://linear.app/affine-design/issue/BS-3161/发现已连接的connector会响应对齐线)
Fixes [BS-3337](https://linear.app/affine-design/issue/BS-3337/connector你肿么了)
Fixes [BS-3334](https://linear.app/affine-design/issue/BS-3334/connector-不应该能够被拖拽)

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

- **Bug Fixes**
	- Corrected typos related to label editing state, ensuring more reliable label editing and display for connectors.
	- Fixed logic in the auto-complete overlay, improving when overlays appear during hover actions.

- **New Features**
	- Improved connector label handling by ensuring label state is preserved and restored during editing.
	- Enhanced connector movement behavior, allowing connectors to be moved only when appropriate elements are selected.

- **Tests**
	- Added end-to-end tests to verify connector movement and selection behaviors for improved reliability.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/model/src/elements/connector/connector.ts

@@ -278,7 +278,13 @@ export class ConnectorElementModel extends GfxPrimitiveElementModel<ConnectorEle
   }
 
   hasLabel() {
-    return Boolean(!this.lableEditing && this.labelDisplay && this.labelXYWH);
+    return Boolean(
+      !this.labelEditing &&
+        this.labelDisplay &&
+        this.labelXYWH &&
+        this.text &&
+        this.text.length
+    );
   }
 
   override includesPoint(
@@ -450,7 +456,7 @@ export class ConnectorElementModel extends GfxPrimitiveElementModel<ConnectorEle
    * Local control display and hide, mainly used in editing scenarios.
    */
   @local()
-  accessor lableEditing: boolean = false;
+  accessor labelEditing: boolean = false;
 
   @field()
   accessor mode: ConnectorMode = DEFAULT_CONNECTOR_MODE;