docs(mkdocs): add showcase navigation entries

CHANGELOG.md

@@ -7,6 +7,14 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ### Added
 
+- **Actor Context Management Showcase** (#4409): New showcase guide
+  `docs/showcase/cli-tools/actor-context-management.md` documenting the CLI
+  lifecycle for removing, exporting, and importing named actor contexts.
+  Covers `actor context remove` (single and bulk), `actor context export`
+  (JSON and YAML), and `actor context import` (with `--update` flag and
+  automatic name inference). Added Showcase section to `mkdocs.yml` navigation
+  covering all 14 existing CLI-tools showcase pages.
+
 - **Git Worktree Sandbox Apply** (#4454): The `plan apply` command now merges
   LLM-generated changes via `git merge` from an isolated worktree branch
   instead of flat `shutil.copy2`.  Displays spec-aligned Apply Summary

mkdocs.yml

@@ -39,6 +39,23 @@ nav:
     - Automation Tracking: development/automation-tracking.md
     - Custom Sandbox Strategy: development/custom_sandbox_strategy.md
     - Documentation Writer: development/docs-writer.md
+  - Showcase:
+    - Overview: showcase/index.md
+    - CLI Tools:
+      - Actor Context Management: showcase/cli-tools/actor-context-management.md
+      - Action and Plan Management: showcase/cli-tools/action-and-plan-management.md
+      - Actor Management Workflow: showcase/cli-tools/actor-management-workflow.md
+      - Audit Log and Security: showcase/cli-tools/audit-log-and-security.md
+      - CleverAgents CLI Basics: showcase/cli-tools/cleveragents-cli-basics.md
+      - Database Migration Management: showcase/cli-tools/database-migration-management.md
+      - Output Format Flags: showcase/cli-tools/output-format-flags.md
+      - Project Init and Context Management: showcase/cli-tools/project-init-and-context-management.md
+      - REPL and Actor Run: showcase/cli-tools/repl-and-actor-run.md
+      - Repo Indexing Workflows: showcase/cli-tools/repo-indexing-workflows.md
+      - Resource and Skill Management: showcase/cli-tools/resource-and-skill-management.md
+      - Server and A2A Integration: showcase/cli-tools/server-and-a2a-integration.md
+      - Session Management Workflows: showcase/cli-tools/session-management-workflows.md
+      - Tool and Validation Management: showcase/cli-tools/tool-and-validation-management.md
   - Implementation Timeline: timeline.md
   - FAQ: faq.md
   - Reference: reference/