fix(session): stop the expiry warning promising a time and an ad it cannot honour

The warning said "Revolt VPN disconnects in 5 minutes" / "Watch an ad to
extend your session." Both can be wrong.

handleSessionWarningAlarm accepts the warning anywhere between
WARNING_FLOOR_MS and WARNING_LEAD_MS + WARNING_SLACK_MS remaining, so it
can say "5 minutes" with just over one left. And the ad is a dead end in
a release build: AdManager.showAd('support') is still kDebugMode-gated
(rule 87), so the support button does nothing there - and nothing at all
in a build shipped with ads off.

Say neither. The comment records what has to change for the number and
the ad to come back.

Co-Authored-By: Claude Opus 5 <[email protected]>

local_packages/flutter_vless_android-1.1.5/android/src/main/kotlin/com/github/tfox/flutter_vless/xray/utils/RevoltAlerts.kt

@@ -27,12 +27,19 @@ object RevoltAlerts {
     private const val TAG = "RevoltAlerts"
     private const val LAUNCH_REQUEST_CODE = 2001
 
+    // Neither line names a number or a mechanism, because this notification
+    // cannot honour either. The caller accepts it anywhere from WARNING_FLOOR_MS
+    // to WARNING_LEAD_MS + WARNING_SLACK_MS remaining, so "5 minutes" can be
+    // off by four of them; and "watch an ad" is a dead end in a release build,
+    // where the support bypass is still kDebugMode-gated (rule 87). Put the
+    // number back once the warning is punctual, and the ad back once the
+    // support button works without a debug build.
     fun postExpiryWarning(context: Context) {
         post(
             context,
             WARNING_NOTIFICATION_ID,
-            "Revolt VPN disconnects in 5 minutes",
+            "Revolt VPN disconnects soon",
-            "Watch an ad to extend your session.",
+            "Open the app to extend your session.",
         )
     }