Add convert mode batch workflow with full progress

web/static/css/style.css

@@ -84,13 +84,6 @@ main {
 }
 
 .upload-area button {
-    background: #3498db;
-    color: white;
-    border: none;
-    padding: 0.75rem 1.5rem;
-    border-radius: 4px;
-    cursor: pointer;
-    font-size: 1rem;
     margin: 1rem 0;
 }
 
@@ -166,6 +159,9 @@ main {
 
 .api-form-actions {
     margin-top: 0.9rem;
+    display: flex;
+    flex-wrap: wrap;
+    gap: 0.6rem;
 }
 
 #api-connect-form.is-disabled {
@@ -173,19 +169,39 @@ main {
     pointer-events: none;
 }
 
-#api-connect-btn {
+#api-connect-btn,
+#convert-folder-btn,
+#convert-run-btn,
+#cancel-job-btn,
+.upload-area button {
     background: #3498db;
-    color: white;
+    color: #fff;
     border: none;
-    padding: 0.6rem 1.2rem;
-    border-radius: 4px;
+    border-radius: 6px;
+    padding: 0.6rem 1rem;
+    font-size: 0.95rem;
+    font-weight: 600;
     cursor: pointer;
+    transition: background-color 0.2s ease, opacity 0.2s ease;
 }
 
-#api-connect-btn:hover {
+#api-connect-btn:hover,
+#convert-folder-btn:hover,
+#convert-run-btn:hover,
+#cancel-job-btn:hover,
+.upload-area button:hover {
     background: #2980b9;
 }
 
+#convert-run-btn:disabled,
+#convert-folder-btn:disabled,
+#api-connect-btn:disabled,
+#cancel-job-btn:disabled,
+.upload-area button:disabled {
+    opacity: 0.6;
+    cursor: not-allowed;
+}
+
 .api-connect-status {
     margin-top: 0.75rem;
     font-size: 0.85rem;
@@ -199,6 +215,38 @@ main {
     color: #dc3545;
 }
 
+.api-connect-status.info {
+    color: #0f4dba;
+}
+
+.convert-progress {
+    margin-top: 0.9rem;
+}
+
+.convert-progress-meta {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 0.35rem;
+    font-size: 0.82rem;
+    color: #475569;
+}
+
+.convert-progress-track {
+    height: 12px;
+    border-radius: 999px;
+    border: 1px solid #cbd5e1;
+    background: #e2e8f0;
+    overflow: hidden;
+}
+
+.convert-progress-bar {
+    height: 100%;
+    width: 0%;
+    background: linear-gradient(90deg, #2563eb, #0ea5e9);
+    transition: width 0.2s ease;
+}
+
 .job-status {
     margin-top: 1rem;
     border: 1px solid #d0d7de;
@@ -220,15 +268,6 @@ main {
     color: #2c3e50;
 }
 
-#cancel-job-btn {
-    background: #dc3545;
-    color: #fff;
-    border: none;
-    border-radius: 4px;
-    padding: 0.45rem 0.75rem;
-    cursor: pointer;
-}
-
 #cancel-job-btn:disabled {
     background: #9ca3af;
     cursor: default;