feat(flow): unify sms multi-provider fallback and stabilize proxy/auth retries

sidepanel/sidepanel.css

@@ -1161,6 +1161,59 @@ header {
   flex: 1;
 }
 
+.country-order-chip {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  padding: 2px 6px;
+  border-radius: 999px;
+  border: 1px solid var(--border);
+  background: var(--bg-base);
+  color: var(--text-primary);
+  font-size: 11px;
+  line-height: 1.2;
+}
+
+.country-order-list {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 4px;
+}
+
+.country-order-chip-label {
+  max-width: 240px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.country-order-remove {
+  border: none;
+  background: transparent;
+  color: var(--text-muted);
+  width: 16px;
+  height: 16px;
+  border-radius: 999px;
+  padding: 0;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 12px;
+  line-height: 1;
+  cursor: pointer;
+}
+
+.country-order-remove:hover {
+  color: var(--text-primary);
+  background: var(--bg-hover);
+}
+
+.country-order-separator {
+  color: var(--text-muted);
+  font-size: 11px;
+}
+
 .data-value.has-value { color: var(--text-primary); }
 
 .mono {
@@ -2114,6 +2167,14 @@ header {
   min-width: 0;
 }
 
+.hero-sms-runtime-select {
+  flex: 1 1 auto;
+  min-width: 0;
+  width: 100%;
+  height: 33px;
+  min-height: 33px;
+}
+
 .hero-sms-price-preview-stack {
   width: 100%;
   display: flex;