chore(spec): regenerate the three reference pages on the merged tree (discharges the os-regen deferral)

Main's side taken by os-regen-merge.sh step 2, then the spec build and gen:docs
re-derived the pages: main's docs title rule (title + navTitle) comes back, and
this branch's list-view tabs rows are unchanged. gen:migration-registry is
byte-identical on the merged tree.

Claude-Session: https://claude.ai/code/session_014EJ1ED8X4MMrT18BhVx4tx
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

content/docs/references/api/protocol.mdx

@@ -1,5 +1,6 @@
 ---
-title: Protocol
+title: Protocol schema — API Protocol reference
+navTitle: Protocol
 description: "Protocol schemas of the ObjectStack API Protocol: AiAgentCapabilities and 133 more — each property with its type, default and a TypeScript example."
 ---
 

content/docs/references/data/object.mdx

@@ -1,5 +1,6 @@
 ---
-title: Object
+title: Object schema — Data Protocol reference
+navTitle: Object
 description: "Object schemas of the ObjectStack Data Protocol: ApiMethod, ApiOperation, Index and 13 more — each property with its type, default and a TypeScript example."
 ---
 

content/docs/references/ui/view.mdx

@@ -1,5 +1,6 @@
 ---
-title: View
+title: View schema — UI Protocol property reference
+navTitle: View
 description: "View protocol schemas — the view metadata type and its three persisted body spellings."
 ---