Update locale files for English, Traditional Chinese, and Simplified Chinese to include new confirmation prompts for enabling audio effects; refactor EffectsPage and EQPage to integrate FeatureGate for managing effect states and user interactions.

client/src/locales/data-en.json

@@ -156,7 +156,11 @@
           }
         ]
       }
-    }
+    },
+    "enableConfirmTitle": "Effects is off",
+    "enableConfirmDesc": "Effects is currently disabled. Turn it on?",
+    "enableConfirmOk": "Enable",
+    "enableConfirmCancel": "Cancel"
   },
   "peq": {
     "Standard": "Standard equalizer preset",
@@ -290,7 +294,10 @@
       "toastApplyBSuccess": "Curve B applied to A",
       "toastApplyBFail": "Failed to apply B",
       "toastSaveBOk": "Preset saved from curve B",
-      "toastSaveBFail": "Failed to save curve B"
+      "toastSaveBFail": "Failed to save curve B",
+      "enableConfirmTitle": "HP-EQ is off",
+      "enableConfirmDesc": "HP-EQ is currently disabled. Turn it on?",
+      "enableConfirmOk": "Enable"
     }
   },
   "dac": {