feat: Add feature flag for scroll sensitivity settings (#245)

- Integrate feature flag for scroll sensitivity configuration
- Conditionally render scroll sensitivity settings based on app version
- Update useEffect to only fetch scroll sensitivity when feature flag is enabled

ui/src/routes/devices.$id.settings.mouse.tsx

@@ -10,6 +10,8 @@ import { useCallback, useEffect, useState } from "react";
 import { useJsonRpc } from "@/hooks/useJsonRpc";
 import { cx } from "../cva.config";
 import { SelectMenuBasic } from "../components/SelectMenuBasic";
+import { useFeatureFlag } from "../hooks/useFeatureFlag";
+import { FeatureFlag } from "../components/FeatureFlag";
 
 type ScrollSensitivity = "low" | "default" | "high";
 
@@ -21,6 +23,8 @@ export default function SettingsKeyboardMouseRoute() {
     state => state.setScrollSensitivity,
   );
 
+  const { isEnabled: isScrollSensitivityEnabled } = useFeatureFlag("0.3.8");
+
   const [jiggler, setJiggler] = useState(false);
 
   const [send] = useJsonRpc();
@@ -31,11 +35,13 @@ export default function SettingsKeyboardMouseRoute() {
       setJiggler(resp.result as boolean);
     });
 
+    if (isScrollSensitivityEnabled) {
       send("getScrollSensitivity", {}, resp => {
         if ("error" in resp) return;
         setScrollSensitivity(resp.result as ScrollSensitivity);
       });
-  }, [send, setScrollSensitivity]);
+    }
+  }, [isScrollSensitivityEnabled, send, setScrollSensitivity]);
 
   const handleJigglerChange = (enabled: boolean) => {
     send("setJigglerState", { enabled }, resp => {
@@ -82,6 +88,8 @@ export default function SettingsKeyboardMouseRoute() {
             onChange={e => setHideCursor(e.target.checked)}
           />
         </SettingsItem>
+
+        <FeatureFlag minAppVersion="0.3.8" name="Scroll Sensitivity">
           <SettingsItem
             title="Scroll Sensitivity"
             description="Adjust the scroll sensitivity"
@@ -101,6 +109,7 @@ export default function SettingsKeyboardMouseRoute() {
               }
             />
           </SettingsItem>
+        </FeatureFlag>
 
         <SettingsItem
           title="Jiggler"