feat(docs): reorder product dropdown by agent lifecycle

src/components/Sidebar.astro

@@ -89,6 +89,62 @@ function getIconPath(icon?: string): string {
   return iconPaths[icon || 'default'] || iconPaths.default;
 }
 
+// ── Lifecycle-ordered product dropdown (Docs tab only) ──────────────────────
+// Reorders the Docs section dropdown from alphabetical to agent-development-
+// lifecycle order, grouped under lightweight phase headers. This is dropdown-only
+// and does NOT reorder the `groups` array in navigation.ts, so the page list below
+// still follows nav order. "Resources" is intentionally omitted; "Falcon AI" sits
+// last; a "Reference" group links out to the Integrations/Guides/SDK/API tabs.
+// The dropdown only renders when a tab exposes multiple groups (today that's the
+// Docs tab); any other multi-group tab falls back to a single unlabelled list.
+interface DropdownItem { title: string; icon: string; href: string; }
+interface DropdownSection { phase: string; items: DropdownItem[]; }
+
+const groupLookup = new Map(
+  allGroups.map(g => [g.group, { icon: g.icon || 'default', href: g.items[0]?.href || '/docs' }])
+);
+// Single source for turning a group title into a dropdown item.
+const toItem = (title: string): DropdownItem => {
+  const g = groupLookup.get(title);
+  return { title, icon: g?.icon || 'default', href: g?.href || '/docs' };
+};
+
+const phasedOrder: { phase: string; titles: string[] }[] = [
+  { phase: 'Start',              titles: ['Get Started'] },
+  { phase: 'Observe & diagnose', titles: ['Observability', 'Error Feed'] },
+  { phase: 'Evaluate & measure',     titles: ['Evaluation', 'Simulation', 'Dataset'] },
+  { phase: 'Improve',            titles: ['Optimization', 'Annotations'] },
+  { phase: 'Build & connect',    titles: ['Prompt', 'Prototype', 'Agent Playground', 'Knowledge Base', 'Agent Command Center'] },
+  { phase: 'Protect',            titles: ['Protect'] },
+  { phase: 'Assistant',          titles: ['Falcon AI'] },
+];
+
+// Reference links live in their own top-level tabs; surface them at the bottom.
+const referenceItems: DropdownItem[] = [
+  { title: 'Integrations', icon: 'plug', href: '/docs/integrations' },
+  { title: 'Guides', icon: 'book', href: '/docs/cookbook' },
+  { title: 'SDK Reference', icon: 'code', href: '/docs/sdk' },
+  { title: 'API Reference', icon: 'webhook', href: '/docs/api' },
+];
+
+let dropdownSections: DropdownSection[];
+if (isDocsTab) {
+  dropdownSections = phasedOrder
+    .map(p => ({ phase: p.phase, items: p.titles.filter(t => groupLookup.has(t)).map(toItem) }))
+    .filter(s => s.items.length > 0);
+
+  // Future-proofing: surface any Docs group not placed above (besides the hidden
+  // "Resources") under "More" so new products never silently vanish.
+  const placed = new Set<string>([...phasedOrder.flatMap(p => p.titles), 'Resources']);
+  const leftovers = allGroups.map(g => g.group).filter(t => !placed.has(t)).map(toItem);
+  if (leftovers.length) dropdownSections.push({ phase: 'More', items: leftovers });
+
+  dropdownSections.push({ phase: 'Reference', items: referenceItems });
+} else {
+  // Other multi-group tabs: one unlabelled section (empty phase hides the header).
+  dropdownSections = [{ phase: '', items: allGroups.map(g => toItem(g.group)) }];
+}
+
 // Infer HTTP method from API endpoint title for sidebar badges
 const isApiTab = activeTab?.tab === 'API';
 
@@ -139,26 +195,34 @@ function inferApiMethod(title: string): { method: string; css: string } | null {
         class="absolute left-3 right-3 mt-1 py-1 bg-[var(--color-bg-secondary)] border border-[var(--color-border-default)] rounded-xl shadow-xl shadow-black/20 z-50 hidden opacity-0 transition-all duration-150 max-h-[60vh] overflow-y-auto hide-scrollbar"
         data-section-dropdown
       >
-        {allGroups.map((group) => {
-          const isCurrent = group.group === activeGroup?.group;
-          const firstHref = group.items[0]?.href || '/docs';
-          return (
-            <a
-              href={firstHref}
-              class:list={[
-                "flex items-center gap-2.5 px-3 py-2 mx-1 rounded-lg text-sm transition-colors",
-                isCurrent
-                  ? "bg-[var(--color-accent-primary)]/10 text-[var(--color-accent-primary)] font-medium"
-                  : "text-[var(--color-text-secondary)] hover:text-[var(--color-text-primary)] hover:bg-[var(--color-bg-hover)]"
-              ]}
-            >
-              <svg class="w-4 h-4 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d={getIconPath(group.icon)} />
-              </svg>
-              <span class="flex-1 truncate">{group.group}</span>
-            </a>
-          );
-        })}
+        {dropdownSections.map((section, sectionIndex) => (
+          <div class:list={["px-1", sectionIndex > 0 && "mt-1.5 pt-1.5 border-t border-[var(--color-border-default)]/60"]}>
+            {section.phase && (
+              <div class="px-2 py-1">
+                <span class="text-[11px] font-semibold text-[var(--color-text-muted)] uppercase tracking-wider">{section.phase}</span>
+              </div>
+            )}
+            {section.items.map((item) => {
+              const isCurrent = item.title === activeGroup?.group;
+              return (
+                <a
+                  href={item.href}
+                  class:list={[
+                    "flex items-center gap-2.5 px-3 py-2 rounded-lg text-sm transition-colors",
+                    isCurrent
+                      ? "bg-[var(--color-accent-primary)]/10 text-[var(--color-accent-primary)] font-medium"
+                      : "text-[var(--color-text-secondary)] hover:text-[var(--color-text-primary)] hover:bg-[var(--color-bg-hover)]"
+                  ]}
+                >
+                  <svg class="w-4 h-4 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d={getIconPath(item.icon)} />
+                  </svg>
+                  <span class="flex-1 truncate">{item.title}</span>
+                </a>
+              );
+            })}
+          </div>
+        ))}
       </div>
     </div>
   )}