Docs: add nav titles across docs (#5689)

docs/refactor/clawnet.md

@@ -3,6 +3,7 @@ summary: "Clawnet refactor: unify network protocol, roles, auth, approvals, iden
 read_when:
   - Planning a unified network protocol for nodes + operator clients
   - Reworking approvals, pairing, TLS, and presence across devices
+title: "Clawnet Refactor"
 ---
 
 # Clawnet refactor (protocol + auth unification)

docs/refactor/exec-host.md

@@ -4,6 +4,7 @@ read_when:
   - Designing exec host routing or exec approvals
   - Implementing node runner + UI IPC
   - Adding exec host security modes and slash commands
+title: "Exec Host Refactor"
 ---
 
 # Exec host refactor plan

docs/refactor/plugin-sdk.md

@@ -3,6 +3,7 @@ summary: "Plan: one clean plugin SDK + runtime for all messaging connectors"
 read_when:
   - Defining or refactoring the plugin architecture
   - Migrating channel connectors to the plugin SDK/runtime
+title: "Plugin SDK Refactor"
 ---
 
 # Plugin SDK + Runtime Refactor Plan

docs/refactor/strict-config.md

@@ -4,6 +4,7 @@ read_when:
   - Designing or implementing config validation behavior
   - Working on config migrations or doctor workflows
   - Handling plugin config schemas or plugin load gating
+title: "Strict Config Validation"
 ---
 
 # Strict config validation (doctor-only migrations)