Tool log: persist agent tool calls in messages

- Message model: tool_log JSON column (array of {name, args, result, error})
- chat.send WS handler accepts tool_log
- MessageOut schema includes tool_log
- Converters pass tool_log through

src/tracker/api/converters.py

@@ -84,6 +84,7 @@ def message_out(m: Message) -> MessageOut:
         author=member_brief(m.author) if m.author else None,
         content=m.content,
         thinking=m.thinking,
+        tool_log=m.tool_log,
         mentions=_resolve_mentions(m),
         actor=member_brief(m.actor) if hasattr(m, 'actor') and m.actor else None,
         voice_url=m.voice_url,

src/tracker/api/schemas.py

@@ -61,6 +61,7 @@ class MessageOut(BaseModel):
     author: MemberBrief | None = None
     content: str
     thinking: str | None = None
+    tool_log: list[dict] | None = None
     mentions: list[MemberBrief] = []
     actor: MemberBrief | None = None
     voice_url: str | None = None

src/tracker/models/chat.py

@@ -3,7 +3,7 @@
 import uuid
 from typing import TYPE_CHECKING
 
-from sqlalchemy import ForeignKey, Integer, String, Text
+from sqlalchemy import ForeignKey, Integer, JSON, String, Text
 from sqlalchemy.dialects.postgresql import ARRAY, UUID
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
@@ -47,6 +47,9 @@ class Message(Base):
     # Actor — who initiated the action (for system messages: who created/moved/assigned the task)
     actor_id: Mapped[uuid.UUID | None] = mapped_column(ForeignKey("members.id"), nullable=True)
 
+    # Tool log — JSON array of tool calls [{name, args, result, error?}]
+    tool_log: Mapped[dict | None] = mapped_column(JSON, nullable=True)
+
     # Content
     content: Mapped[str] = mapped_column(Text, nullable=False)
     thinking: Mapped[str | None] = mapped_column(Text, nullable=True)  # LLM reasoning/thinking block

src/tracker/ws/handler.py

@@ -42,6 +42,7 @@ def _to_message_out(msg: Message, author: Member | None = None) -> MessageOut:
         author=_to_member_brief(author) if author else None,
         content=msg.content,
         thinking=msg.thinking,
+        tool_log=msg.tool_log,
         mentions=mention_briefs,
         actor=_to_member_brief(msg.actor) if hasattr(msg, 'actor') and msg.actor else None,
         voice_url=msg.voice_url,
@@ -287,6 +288,7 @@ async def _handle_chat_send(session_id: str, data: dict):
     task_id = data.get("task_id")
     content = data.get("content", "")
     thinking = data.get("thinking")
+    tool_log = data.get("tool_log")
     mentions = data.get("mentions", [])
 
     if not content:
@@ -306,6 +308,7 @@ async def _handle_chat_send(session_id: str, data: dict):
             author_id=member.id,
             content=content,
             thinking=thinking,
+            tool_log=tool_log,
             mentions=mentions,
         )
         db.add(msg)