Feat v0.2.3 sdk tasks (#7)

Co-authored-by: Jeffrey Smith <jasafpro@gmail.com>
Co-committed-by: Jeffrey Smith <jasafpro@gmail.com>

src/css/sw-shell.css

@@ -123,6 +123,43 @@
     flex-direction: column;
 }
 
+/* ── Topbar — standard surface navigation bar ── */
+
+.sw-topbar {
+    display: flex;
+    align-items: center;
+    height: 44px;
+    padding: 0 12px;
+    background: var(--bg-surface);
+    border-bottom: 1px solid var(--border);
+    flex-shrink: 0;
+    gap: 10px;
+}
+
+.sw-topbar__title {
+    font-weight: 600;
+    font-size: 0.9rem;
+    color: var(--text);
+    flex-shrink: 0;
+    white-space: nowrap;
+}
+
+.sw-topbar__spacer {
+    flex: 1;
+}
+
+.sw-topbar__slot {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+}
+
+.sw-topbar__right {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+}
+
 /* ── User menu trigger ───────────────────── */
 
 .sw-user-menu__trigger {