fix(cli): sync _skill_commands after /reload-skills so Tab completion picks up new skills

The Tab-completion lambda captured _skill_commands at startup, so newly
installed skills were missing from Tab completion even after /reload-skills
reported them as added.

Two changes:
1. Tab-completion lambda now calls get_skill_commands() instead of reading
   the module-level _skill_commands snapshot — ensures the lambda always
   gets fresh data without needing to touch global state.
2. _reload_skills() now syncs cli.py's module-level _skill_commands via
   get_skill_commands() after reload, so help display, command dispatch,
   and any other direct _skill_commands readers also see the updated map.

Closes #26441

cli.py

@@ -2412,6 +2412,7 @@ def _looks_like_slash_command(text: str) -> bool:
 
 from agent.skill_commands import (
     scan_skill_commands,
+    get_skill_commands,
     build_skill_invocation_message,
     build_preloaded_skills_prompt,
 )
@@ -9656,12 +9657,18 @@ class HermesCLI:
         prompt caching intact.
         """
         try:
-            from agent.skill_commands import reload_skills
+            from agent.skill_commands import reload_skills, get_skill_commands
 
             if not self._command_running:
                 print("🔄 Reloading skills...")
 
             result = reload_skills()
+
+            # Sync cli.py's module-level _skill_commands so all consumers
+            # (help display, command dispatch, Tab-completion lambda) see the
+            # updated dict without needing to restart the session.
+            global _skill_commands
+            _skill_commands = get_skill_commands()
             added = result.get("added", [])      # [{"name", "description"}, ...]
             removed = result.get("removed", [])  # [{"name", "description"}, ...]
             total = result.get("total", 0)
@@ -12667,7 +12674,7 @@ class HermesCLI:
 
 
         _completer = SlashCommandCompleter(
-            skill_commands_provider=lambda: _skill_commands,
+            skill_commands_provider=lambda: get_skill_commands(),
             command_filter=cli_ref._command_available,
         )
         input_area = TextArea(