fix: allow safe fresh-clone DryRun builds

src/MBN_STOCK_WEBVIEW.LegacyParityApp/Web/index.html

@@ -203,6 +203,7 @@
         <header class="workspace-header">
           <div class="brand">
             <span class="brand-wordmark-plate">
+              <span class="brand-wordmark-fallback">매일경제TV</span>
               <img class="brand-wordmark" src="Brand/logo.png" width="176" height="43"
                 alt="매일경제TV" draggable="false">
             </span>

src/MBN_STOCK_WEBVIEW.LegacyParityApp/Web/styles.css

@@ -945,6 +945,23 @@ input[type="checkbox"], input[type="radio"] { accent-color: var(--ui-accent); }
   background: #fff;
   box-shadow: 0 0 0 1px rgba(15, 23, 42, .08), 0 1px 2px rgba(15, 23, 42, .08);
 }
+.brand-wordmark-fallback,
+.brand-wordmark {
+  grid-area: 1 / 1;
+}
+.brand-wordmark-fallback {
+  visibility: hidden;
+  color: #172033;
+  font-size: 16px;
+  font-weight: 800;
+  letter-spacing: -.045em;
+}
+.brand-wordmark-plate.wordmark-fallback-active .brand-wordmark-fallback {
+  visibility: visible;
+}
+.brand-wordmark-plate.wordmark-fallback-active .brand-wordmark {
+  display: none;
+}
 .brand-wordmark {
   display: block;
   width: 142px;

src/MBN_STOCK_WEBVIEW.LegacyParityApp/Web/workspace-navigation.js

@@ -17,6 +17,19 @@
   const shell = document.querySelector(".operator-shell");
   const splitter = document.getElementById("workspace-splitter");
   const playlistPanel = document.querySelector(".playlist-panel");
+  const brandWordmark = document.querySelector("img.brand-wordmark");
+  const brandWordmarkPlate = brandWordmark?.closest(".brand-wordmark-plate");
+
+  function showBrandWordmarkFallback() {
+    brandWordmarkPlate?.classList.add("wordmark-fallback-active");
+  }
+
+  if (brandWordmark) {
+    brandWordmark.addEventListener("error", showBrandWordmarkFallback, { once: true });
+    if (brandWordmark.complete && brandWordmark.naturalWidth === 0) {
+      showBrandWordmarkFallback();
+    }
+  }
 
   if (!region || !navigation || !navigationItems || !toggle || !toggleLabel ||
       !stockTab || !settingsTab || !stockWorkspace || !catalogWorkspace ||