Improve initial URN local match refresh handling

Modify scheduleInitialUrnLocalMatchRefresh to accept container and data parameters,
track refresh tasks as an array of async functions, and use Promise.allSettled
to wait for all tasks before updating the UI. This ensures that the missing
models browser is refreshed only after all initial URN local match refreshes
have completed, preventing UI updates during ongoing async operations.

Also adjust renderMissingModel to conditionally render known download panels
based on downloadSource availability.

web/linker.js

@@ -1276,21 +1276,31 @@ class LinkerManagerDialog extends ComfyDialog {
         }
     }
 
-    scheduleInitialUrnLocalMatchRefresh(missingModels = []) {
+    scheduleInitialUrnLocalMatchRefresh(missingModels = [], container = null, data = null) {
+        const refreshTasks = [];
+
         missingModels.forEach((missing) => {
             if (!missing?.is_urn || missing.__urnLocalRefreshQueued) return;
             if (this.getBestLocalMatch(missing, 70)) return;
 
             missing.__urnLocalRefreshQueued = true;
-            setTimeout(async () => {
+            const task = (async () => {
                 try {
                     await this.resolveUrnDataForMissing(missing);
                     await this.refreshUrnLocalMatches(missing);
                 } catch (error) {
-                    missing.__urnLocalRefreshQueued = false;
+                    missing.__urnLocalRefreshFailed = true;
                     console.error('Model Linker: initial URN local match refresh error:', error);
                 }
-            }, 0);
+            })();
+            refreshTasks.push(task);
+        });
+
+        if (!refreshTasks.length || !container || !data) return;
+
+        Promise.allSettled(refreshTasks).then(() => {
+            if (!container.isConnected || this.activeTab !== 'missing') return;
+            this.displayMissingModels(container, data);
         });
     }
 
@@ -5638,7 +5648,7 @@ class LinkerManagerDialog extends ComfyDialog {
             hasAny100Match
         );
         this.wireMissingModelsBrowser(container, data, sortedMissingModels);
-        this.scheduleInitialUrnLocalMatchRefresh(sortedMissingModels);
+        this.scheduleInitialUrnLocalMatchRefresh(sortedMissingModels, container, data);
     }
 
     renderMissingModel(missing, missingIndex = 0) {
@@ -5755,15 +5765,15 @@ class LinkerManagerDialog extends ComfyDialog {
         const downloadSource = missing.download_source;
         const urnDownloadId = `urn-download-${missing.node_id}-${missing.widget_index}`;
         
-        if (perfectMatches.length > 0) {
+        if (downloadSource && downloadSource.url) {
+            html += this.renderKnownDownloadPanel(missing, downloadSource);
+        } else if (perfectMatches.length > 0) {
             // Has perfect local match - download not needed, but allow online re-check.
             html += `<div class="ml-download-section">`;
             html += this.renderSearchControls(missing, { buttonText: 'Search Online' });
             html += this.renderDownloadTargetControls(missing, missing.category || 'checkpoints');
             html += `</div>`;
             html += `<div id="search-results-${missing.node_id}-${missing.widget_index}" class="ml-search-results"></div>`;
-        } else if (downloadSource && downloadSource.url) {
-            html += this.renderKnownDownloadPanel(missing, downloadSource);
         } else if (missing.is_urn) {
             html += `<div id="${urnDownloadId}" class="ml-download-section">`;
             html += `<div class="ml-download-info">Resolving CivitAI download for this URN...</div>`;