fix: keep network search field enabled after clearing calls

packages/devtools_app/lib/src/screens/network/network_screen.dart

@@ -194,8 +194,6 @@ class _NetworkProfilerControlsState extends State<_NetworkProfilerControls>
         _recording = controller.recordingNotifier.value;
       });
     });
-
-    addAutoDisposeListener(controller.filteredData);
   }
 
   @override
@@ -205,7 +203,6 @@ class _NetworkProfilerControlsState extends State<_NetworkProfilerControls>
     }
 
     final screenWidth = ScreenSize(context).width;
-    final hasRequests = controller.filteredData.value.isNotEmpty;
     return Column(
       children: [
         Row(
@@ -233,7 +230,6 @@ class _NetworkProfilerControlsState extends State<_NetworkProfilerControls>
             Expanded(
               child: SearchField<NetworkController>(
                 searchController: controller,
-                searchFieldEnabled: hasRequests,
                 searchFieldWidth: screenWidth <= MediaSize.xs
                     ? defaultSearchFieldWidth
                     : wideSearchFieldWidth,

packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md

@@ -39,7 +39,9 @@ TODO: Remove this section if there are not any updates.
 
 ## Network profiler updates
 
-TODO: Remove this section if there are not any updates.
+* Fixed the Network tab search field becoming disabled after clearing all
+  requests, so the search query can now be edited at any time. -
+  [#9855](https://github.com/flutter/devtools/pull/9855)
 
 ## Logging updates
 

packages/devtools_app/test/screens/network/network_profiler_test.dart

@@ -65,6 +65,12 @@ void main() {
 
   group('Network Profiler', () {
     setUp(() {
+      // Reload the fixtures for every test. Clearing requests mutates these
+      // shared profiles in place (FakeVmServiceWrapper clears the same lists
+      // aliased by _startingRequests/_startingSockets), so a test that taps
+      // Clear would otherwise leave them empty for the next test.
+      socketProfile = loadSocketProfile();
+      httpProfile = loadHttpProfile();
       fakeServiceConnection = FakeServiceConnectionManager(
         service: FakeServiceManager.createFakeService(
           socketProfile: socketProfile,
@@ -338,6 +344,48 @@ void main() {
       // Wait to ensure all the timers have been cancelled.
       await tester.pumpAndSettle(const Duration(seconds: 2));
     });
+
+    testWidgetsWithWindowSize(
+      'search field stays enabled after clearing',
+      windowSize,
+      (WidgetTester tester) async {
+        // Load the network profiler screen.
+        controller = NetworkController();
+        await pumpNetworkScreen(tester);
+
+        // Populate the screen with requests.
+        await loadRequestsAndCheck(tester);
+
+        Finder searchFieldTextField() => find.descendant(
+          of: find.byType(SearchField<NetworkController>),
+          matching: find.byType(TextField),
+        );
+
+        // The search field is enabled while requests are present.
+        expect(
+          tester.widget<TextField>(searchFieldTextField()).enabled,
+          isTrue,
+        );
+
+        // Pause the profiler so polling does not repopulate the requests after
+        // they are cleared below.
+        await tester.tap(find.byType(StartStopRecordingButton));
+        await tester.pumpAndSettle();
+
+        // Clear the results.
+        await tester.tap(find.byType(ClearButton));
+        await tester.pumpAndSettle(const Duration(seconds: 2));
+        expect(controller.requests.value, isEmpty);
+
+        // The search field must stay enabled even with no requests present, so
+        // the query can still be edited before the next batch of requests
+        // arrives.
+        expect(
+          tester.widget<TextField>(searchFieldTextField()).enabled,
+          isTrue,
+        );
+      },
+    );
   });
 
   group('NetworkRequestOverviewView', () {