design(preview): move refresh button inside the address bar for a cleaner layout

vibn-frontend/components/project/project-icon-rail.tsx

@@ -112,7 +112,7 @@ function PreviewDeviceToggles() {
           gap: 6,
           background: "#fafafa",
           border: "1px solid #e4e4e7",
-          padding: "4px 12px",
+          padding: "4px 8px",
           borderRadius: 8,
           height: 34,
           flex: 1, // Let the URL bar grow to fill the header space
@@ -121,7 +121,41 @@ function PreviewDeviceToggles() {
           fontSize: "0.75rem",
         }}
       >
-        <span style={{ opacity: 0.6 }}>🌐</span>
+        <button
+          onClick={triggerRefresh}
+          title="Reload Preview"
+          style={{
+            display: "flex",
+            alignItems: "center",
+            justifyContent: "center",
+            width: 24,
+            height: 24,
+            borderRadius: 4,
+            border: "none",
+            cursor: "pointer",
+            transition: "all 0.15s",
+            background: "transparent",
+            color: "#71717a",
+          }}
+          onMouseEnter={(e) => {
+            e.currentTarget.style.background = "#e4e4e7";
+            e.currentTarget.style.color = "#18181b";
+          }}
+          onMouseLeave={(e) => {
+            e.currentTarget.style.background = "transparent";
+            e.currentTarget.style.color = "#71717a";
+          }}
+        >
+          <RotateCw size={12} />
+        </button>
+        <div
+          style={{
+            width: 1,
+            height: 14,
+            background: "#e4e4e7",
+            margin: "0 2px",
+          }}
+        />
         <input
           type="text"
           value={displayUrl}
@@ -135,6 +169,7 @@ function PreviewDeviceToggles() {
             color: "#18181b",
             fontSize: "0.75rem",
             textOverflow: "ellipsis",
+            paddingLeft: 4,
           }}
         />
         {displayUrl && (
@@ -160,39 +195,6 @@ function PreviewDeviceToggles() {
           border: "1px solid #e4e4e7",
         }}
       >
-        <button
-          onClick={triggerRefresh}
-          title="Reload Preview"
-          style={{
-            display: "flex",
-            alignItems: "center",
-            justifyContent: "center",
-            width: 28,
-            height: 26,
-            borderRadius: 6,
-            border: "none",
-            cursor: "pointer",
-            transition: "all 0.15s",
-            background: "transparent",
-            color: "#71717a",
-            marginRight: 4,
-          }}
-          onMouseEnter={(e) => (e.currentTarget.style.color = "#18181b")}
-          onMouseLeave={(e) => (e.currentTarget.style.color = "#71717a")}
-        >
-          <RotateCw size={14} />
-        </button>
-
-        <div
-          style={{
-            width: 1,
-            height: 16,
-            background: "#e4e4e7",
-            alignSelf: "center",
-            marginRight: 4,
-          }}
-        />
-
         <button
           onClick={() => setDeviceMode("desktop")}
           style={{