refactor(examples): rename coding-agent leaf to repl-agent

Name the runnable leaf for the line-oriented front door it owns, matching the existing tui-agent and acp-agent organization. Move the complete config, Code Mode overlay, tests, metadata, and generated composition graph together, then update every loader path and repository reference.

Keep the shared model identity independent of its terminal front door by phrasing the persona as a coding-agent role rather than retaining the retired leaf name. Regenerate graph and tool catalogs and re-record each affected bilingual pair so derived documentation cannot point at the removed path.

examples/tui-agent/code-mode.cordis.yml

@@ -1,9 +1,9 @@
-# Code Mode keeps the TUI front door while reusing the coding-agent overlay's
+# Code Mode keeps the TUI front door while reusing the repl-agent overlay's
 # worker runtime and one-tool registry composition.
 - id: base
   name: '@cordisjs/plugin-include'
   config:
-    path: ../coding-agent/code-mode.cordis.yml
+    path: ../repl-agent/code-mode.cordis.yml
     patches:
       - id: stdio-agent
         name: '@deepseek-ai/dsh-stdio-demo'
@@ -23,7 +23,7 @@
               showReasoning: true
               maxToolOutputLines: 12
           persona: |
-            You are coding-agent, a coding assistant powered by the {{model}} model.
+            You are a coding agent powered by the {{model}} model.
 
             You work by writing TypeScript programs for run_code: batch related
             tool work into one program, loop and branch where it helps, and print