feat: chat-side feedback — reactions in conversation thread back to her thoughts

Closes the last loop gap: when she raised a thought in chat and Brian replied in
the conversation (not the feed), it was a dead end. Now she has a thought_response
tool — when he reacts to a thought she surfaced, she captures his take and it folds
back into that thread (next dream pass she reacts, like a feed reply).

- tools: _thought_response(thread_id, brian_said) -> thoughts.record_response.
- modes: thought_response added to _BASE (all modes).
- surfaced-note + context_note now expose each thread's #id and instruct her to use
  the tool when he engages, so she has what she needs to call it.
- test for the tool (threads reply back + bad-id handling). Suite 81, ruff clean.

Feedback now closes from both surfaces: the /thoughts feed AND live conversation.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lyra/tools.py

@@ -52,6 +52,21 @@ def _think_about(args: dict, ctx: dict) -> str:
             "I'll come back to it on my own between our conversations.")
 
 
+def _thought_response(args: dict, ctx: dict) -> str:
+    try:
+        tid = int(args.get("thread_id"))
+    except (TypeError, ValueError):
+        return "Tell me which thought — I need its thread id (the #number you were given)."
+    said = (args.get("brian_said") or "").strip()
+    if not said:
+        return "Nothing to record yet — what did Brian say about it?"
+    if not thoughts.record_response(tid, said):
+        return f"(couldn't find thought thread #{tid})"
+    logbus.log("info", "Brian reacted to a thought in chat (tool)", thread=tid)
+    return (f"Folded Brian's take into thread #{tid} — I'll pick it back up and react "
+            "next time I'm thinking.")
+
+
 # name -> {spec (OpenAI function tool), handler}
 TOOLS: dict[str, dict] = {
     "journal_write": {
@@ -437,6 +452,15 @@ _S = {"type": "string"}
 _N = {"type": "number"}
 
 TOOLS.update({
+    "thought_response": {"handler": _thought_response, "spec": _f(
+        "thought_response",
+        "When you've brought one of your own thoughts/threads to Brian and he responds to "
+        "it in the conversation, capture his reaction here so it folds back into that "
+        "thread — you'll carry it forward on your own next time you think. Use the thread "
+        "id (#number) you were given for that thought.",
+        {"thread_id": {**_N, "description": "The thread id (#number) of the thought he reacted to."},
+         "brian_said": {**_S, "description": "What Brian said / his take, in your words."}},
+        ["thread_id", "brian_said"])},
     "start_session": {"handler": _start_session, "spec": _f(
         "start_session",
         "Begin a live poker session. Call when Brian sits down to play.",