feat(outboundQueue): implement serial outbound job queue and enhance global state configuration

meshchatx/src/frontend/js/GlobalState.js

@@ -5,6 +5,7 @@ const globalState = reactive({
     authSessionResolved: true,
     authEnabled: false,
     authenticated: false,
+    detailedOutboundSendStatus: false,
     unreadConversationsCount: 0,
     activeCallTab: "phone",
     blockedDestinations: [],
@@ -21,4 +22,12 @@ const globalState = reactive({
     },
 });
 
+export function mergeGlobalConfig(next) {
+    if (!next || typeof next !== "object") {
+        return;
+    }
+    const prev = globalState.config && typeof globalState.config === "object" ? globalState.config : {};
+    globalState.config = { ...prev, ...next };
+}
+
 export default globalState;

meshchatx/src/frontend/js/outboundSendQueue.js

@@ -0,0 +1,36 @@
+/**
+ * Serial outbound job queue: one job runs at a time so later messages reuse
+ * the route established while sending earlier ones to the same peer.
+ */
+export function createOutboundQueue(processJob) {
+    const queue = [];
+    let running = false;
+
+    async function run() {
+        if (running) {
+            return;
+        }
+        running = true;
+        try {
+            while (queue.length) {
+                const job = queue.shift();
+                await processJob(job);
+            }
+        } finally {
+            running = false;
+        }
+    }
+
+    return {
+        enqueue(job) {
+            queue.push(job);
+            void run();
+        },
+        get length() {
+            return queue.length;
+        },
+        get isRunning() {
+            return running;
+        },
+    };
+}