feat(cli): mcpctl chat-llm + KIND/STATUS columns (v1 Stage 5)

Closes the loop on user-facing surface:

  $ mcpctl get llm
  NAME             KIND     STATUS    TYPE     MODEL                       TIER  KEY  ID
  qwen3-thinking   public   active    openai   qwen3-thinking              fast  ...  ...
  vllm-local       virtual  active    openai   Qwen/Qwen2.5-7B-Instruct    fast  -    ...

  $ mcpctl chat-llm vllm-local
  ────────────────────────────────────────
  LLM: vllm-local  openai → Qwen/Qwen2.5-7B-Instruct-AWQ
  Kind: virtual    Status: active
  ────────────────────────────────────────
  > hello?
  Hi! …

New: chat-llm command (commands/chat-llm.ts)
- Stateless chat with any mcpd-registered LLM. No threads, no tools,
  no project prompts. POSTs to /api/v1/llms/<name>/infer; mcpd's
  kind=virtual branch handles relay-through-mcplocal transparently,
  so the same CLI command works for both public and virtual LLMs.
- Reuses installStatusBar / formatStats / recordDelta / styleStats /
  PhaseStats from chat.ts (now exported) so the bottom-row tokens-per-
  second ticker behaves identically to mcpctl chat.
- Flags: --message (one-shot), --system, --temperature, --max-tokens,
  --no-stream. Streaming uses OpenAI chat.completion.chunk SSE.
- REPL mode keeps a per-session history array so multi-turn flows
  feel natural; each turn is an independent inference call.

Updated: get.ts
- LlmRow gains optional kind/status fields.
- llmColumns layout: NAME, KIND, STATUS, TYPE, MODEL, TIER, KEY, ID.
  Defaults gracefully when older mcpd responses don't return them.

Updated: chat.ts
- Re-exports the helpers chat-llm.ts needs (PhaseStats, newPhase,
  recordDelta, formatStats, styleStats, styleThinking, STDERR_IS_TTY,
  StatusBar, installStatusBar). No behavior change.

Completions: chat-llm picks up the standard option enumeration
automatically; bash gets a special-case for first-arg LLM-name
completion via _mcpctl_resource_names "llms".

CLI suite: 437/437 (was 430, +7 from auto-discovered test cases in
the regenerated completions golden). Workspace: 2043/2043 across
152 files.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

scripts/generate-completions.ts

@@ -920,6 +920,20 @@ function emitBashCase(emit: (s: string) => void, cmd: CmdInfo, root: CmdInfo): v
     return;
   }
 
+  // chat-llm: first arg is LLM name
+  if (name === 'chat-llm') {
+    emit(`    ${name})`);
+    emit('      if [[ $((cword - subcmd_pos)) -eq 1 ]]; then');
+    emit('        local names');
+    emit('        names=$(_mcpctl_resource_names "llms")');
+    emit(`        COMPREPLY=($(compgen -W "$names ${optFlags}" -- "$cur"))`);
+    emit('      else');
+    emit(`        COMPREPLY=($(compgen -W "${optFlags}" -- "$cur"))`);
+    emit('      fi');
+    emit('      return ;;');
+    return;
+  }
+
   // console: first arg is project name
   if (name === 'console') {
     emit(`    ${name})`);