The new loop's core: intake, restatement, go-ahead, threads (M2.1, PR B)

nisse_dev.loop runs alongside control.py, chosen with `loop: new`.
Issues assigned to the agent (by an operator, or filed by one) become work
items, each with a Matrix thread. A driver run is one model with tools
until it calls a waiting tool: restate puts rev-N up for a go-ahead, bound
to the revision on screen when the reply arrived; ask_human waits for an
answer; close_item closes the item and its issue. Before the go-ahead the
driver can look but not change or close anything. One item is active at a
time; replies in an item's thread go to it. On boot, an item cut off
mid-run waits on the operator, and waiting points are put up again.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPQ14L3LikyefCMFBqEbKE

nisse-dev/src/nisse_dev/views.py

@@ -52,6 +52,8 @@ def operator_label(source: str) -> str:
     elif origin.startswith("gitea:pr:"):
         number = origin.split(":")[2]
         channel = f"comment on PR #{number}"
+    elif origin.startswith("gitea:issue-body:"):
+        channel = f"issue #{origin.split(':')[2]}"
     elif origin.startswith("gitea:issue:"):
         number = origin.split(":")[2]
         channel = f"comment on plan issue #{number}"