Refactor BottomNav and CommunityPage to enhance community forum integration; update navigation logic for mobile and desktop views. Add new localized strings for community page and system settings, including device information and user prompts.

client/src/locales/data-en.json

@@ -11,7 +11,8 @@
     "powerOffConfirmOk": "Turn off",
     "powerOffConfirmCancel": "Cancel",
     "powerOffToastDemo": "Demo mode: disconnected from the device.",
-    "powerOffToastSent": "Shutdown command sent."
+    "powerOffToastSent": "Shutdown command sent.",
+    "doubleClickHint": "Double-click to enter"
   },
   "vuPage": {
     "title": "VU meter gallery"
@@ -23,6 +24,13 @@
     "effects": "Effects",
     "myAi": "My AI"
   },
+  "communityPage": {
+    "title": "Community",
+    "intro": "The forum opens best in your system browser. Copy the full link below, paste it into your mobile browser’s address bar, and open it.",
+    "copyLink": "Copy link",
+    "toastCopied": "Link copied",
+    "toastCopyFailed": "Could not copy. Long-press the link to copy it manually."
+  },
   "source": {
     "label": "Input/Output",
     "input": {
@@ -226,6 +234,11 @@
     "eqUi": {
       "batchEditTitle": "Batch edit",
       "batchEditHint": "11 lines total: line 1 is Preamp, lines 2–11 are Filter 1–10. Saving overwrites the current headphone preset.",
+      "addPresetTitle": "New preset",
+      "addPresetNameEmpty": "Name cannot be empty",
+      "addPresetNameExists": "That name already exists. Choose another.",
+      "toastAddPresetOk": "Preset added",
+      "toastAddPresetFail": "Failed to add preset",
       "cancel": "Cancel",
       "save": "Save",
       "tabBrands": "Brands",
@@ -275,6 +288,9 @@
     }
   },
   "dac": {
+    "sectionBalanceSensitivity": "Balance & sensitivity",
+    "sectionOutput": "Output characteristics",
+    "sectionSystemInterface": "System & interface",
     "balance": "Left-right balance",
     "sensitivity": "VU Meter Sensitivity",
     "filters": {
@@ -528,6 +544,22 @@
           "label": "60 seconds of inactivity"
         }
       ]
+    },
+    "systemPage": {
+      "sectionDisplay": "Display",
+      "sectionGeneral": "General",
+      "sectionAbout": "About",
+      "screenBrightnessDesc": "Adjust overall screen brightness",
+      "turnOffScreenDesc": "Time before the screen turns off after no activity",
+      "knobBrightnessDesc": "Brightness of the knob indicator LEDs",
+      "buttonLightDesc": "Breathing light effect on the knob when the screen is locked",
+      "languageDesc": "System display language",
+      "automaticDesc": "Return to the home screen automatically after idle time",
+      "sleepDesc": "When the device enters sleep or low-power mode",
+      "deviceName": "Device name",
+      "firmwareVersion": "Firmware version",
+      "macAddress": "MAC address",
+      "disconnect": "Disconnect"
     }
   },
   "prompt": {