fix: bitcoin receive, AIUI pointer input, electrs self-heal, OTA timeout

- LND wallet: request correct address type so receive-address generation
  no longer 400s
- AIUI/app session: on-screen pointer can click + type into app content
  (incl. app store search); "open in new tab" opens the phone browser;
  mobile credential modal centered instead of full-height
  (remote-relay.ts, AppSession.vue, AppSessionFrame.vue, AppIconGrid.vue,
  openExternal.ts, WebViewScreen.kt) + remote-relay tests
- health_monitor: electrs auto-recovers from a corrupt index and shows a
  percent/block-height progress screen while reindexing (useElectrsSync.ts)
- update.rs: drop retired tx1138 secondary mirror (one-time migration);
  longer download timeout for slow connections
- CHANGELOG: v1.7.90-alpha notes
- tests/release/run.sh: harness tweaks

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Android/app/src/main/java/com/archipelago/app/ui/screens/WebViewScreen.kt

@@ -137,7 +137,11 @@ fun WebViewScreen(
                             val intent = android.content.Intent(
                                 android.content.Intent.ACTION_VIEW,
                                 android.net.Uri.parse(url),
-                            )
+                            ).apply {
+                                // Required when launching from a non-Activity/binder
+                                // thread (the JS bridge below runs off the UI thread).
+                                addFlags(android.content.Intent.FLAG_ACTIVITY_NEW_TASK)
+                            }
                             context.startActivity(intent)
                         } catch (_: Exception) {}
                     }
@@ -169,8 +173,29 @@ fun WebViewScreen(
                             allowContentAccess = true
                             allowFileAccess = false
                             setSupportMultipleWindows(true)  // enables onCreateWindow for window.open
+                            // Let JS open windows without a synchronous user-gesture
+                            // chain; without this, window.open() from a Vue click
+                            // handler silently no-ops and "Open in new tab" dies.
+                            javaScriptCanOpenWindowsAutomatically = true
                         }
 
+                        // Deterministic bridge for "open in the phone's browser".
+                        // The web UI calls window.ArchipelagoNative.openExternal(url)
+                        // when present (companion app), falling back to window.open
+                        // in a plain mobile browser. This avoids relying on the
+                        // window.open → onCreateWindow path, which noopener/noreferrer
+                        // can suppress in the WebView.
+                        val webViewRef = this
+                        addJavascriptInterface(
+                            object {
+                                @android.webkit.JavascriptInterface
+                                fun openExternal(url: String) {
+                                    webViewRef.post { openExternalUrl(url) }
+                                }
+                            },
+                            "ArchipelagoNative",
+                        )
+
                         webViewClient = object : WebViewClient() {
                             override fun onPageStarted(view: WebView?, url: String?, favicon: Bitmap?) {
                                 isLoading = true