integration: add route metadata, JSON-LD and harden the public shell

Ship prerendered SEO, crawl files and palette/map a11y so every locale route is indexable, honest and keyboard-usable without inventing claims.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/app.scss

@@ -29,10 +29,6 @@
   border-radius: var(--radius-lg);
 }
 
-.site-actions app-command-palette {
-  flex: 0 0 auto;
-}
-
 .site-identity,
 .site-nav a,
 .site-actions a,
@@ -41,14 +37,34 @@
   text-decoration: none;
 }
 
+.site-identity,
+.site-nav a,
+.site-actions a,
+.site-footer a,
+.nav-toggle {
+  min-height: 2.75rem;
+}
+
+.site-identity,
+.site-nav a,
+.site-actions a,
+.site-footer a {
+  display: inline-flex;
+  align-items: center;
+}
+
 .site-identity {
   font-weight: 600;
 }
 
-.nav-toggle {
+.site-toolbar {
   justify-self: end;
-  width: 2.5rem;
-  height: 2.5rem;
+  align-items: center;
+}
+
+.nav-toggle {
+  width: 2.75rem;
+  height: 2.75rem;
   border: 1px solid var(--surface-glass-border);
   border-radius: var(--radius-sm);
   background: transparent;
@@ -120,7 +136,11 @@
 
 .site-main {
   flex: 1;
-  outline: none;
+}
+
+.site-main:focus-visible {
+  outline: var(--focus-ring-width) solid var(--focus-ring-color);
+  outline-offset: var(--focus-ring-offset);
 }
 
 .site-footer {
@@ -142,7 +162,7 @@
   }
 
   .site-header-inner {
-    grid-template-columns: auto 1fr auto;
+    grid-template-columns: auto 1fr auto auto;
     align-items: center;
   }
 
@@ -154,6 +174,14 @@
     grid-column: auto;
   }
 
+  .site-toolbar {
+    order: 3;
+  }
+
+  .site-actions {
+    order: 4;
+  }
+
   .primary-nav {
     flex-direction: row;
     flex-wrap: wrap;