Add SSE streaming for server refresh with live progress log modal

app/static/style.css

@@ -512,6 +512,76 @@ main {
     font-style: italic;
 }
 
+/* --- Log Modal --- */
+
+.log-modal {
+    position: fixed;
+    inset: 0;
+    background: rgba(0, 0, 0, 0.6);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    z-index: 1000;
+    backdrop-filter: blur(2px);
+}
+
+.log-modal-content {
+    background: #1e293b;
+    border: 1px solid #334155;
+    border-radius: 12px;
+    width: 500px;
+    max-width: 90vw;
+    max-height: 60vh;
+    display: flex;
+    flex-direction: column;
+    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
+}
+
+.log-modal-header {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    padding: 14px 18px;
+    border-bottom: 1px solid #334155;
+    font-weight: 600;
+    font-size: 0.9rem;
+    color: #f1f5f9;
+}
+
+.log-modal-body {
+    padding: 12px 18px;
+    overflow-y: auto;
+    flex: 1;
+    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
+    font-size: 0.75rem;
+    line-height: 1.6;
+}
+
+.log-line {
+    color: #94a3b8;
+}
+
+.log-line.log-ok {
+    color: #22c55e;
+}
+
+.log-line.log-err {
+    color: #ef4444;
+}
+
+.spinner {
+    width: 14px;
+    height: 14px;
+    border: 2px solid #334155;
+    border-top-color: #3b82f6;
+    border-radius: 50%;
+    animation: spin 0.8s linear infinite;
+}
+
+@keyframes spin {
+    to { transform: rotate(360deg); }
+}
+
 /* --- Empty State --- */
 
 .empty-state {