feat(feedback): chat plane on the dashboard + honest triage ranking

Tasks 3-8 of the chat-plane plan:
- cron newos4-chat-ingest (0cc4bb4d2f82, */10, script-only, silent when idle)
- collect.py: plan_key() normalises the two ledger spellings on read (5 rows
  carried a plan name without .md and were silently unmatched); per-item
  bulk_pass for the 2026-10-26 pass; counts.chat_total
- feedback.html: 5th tile "from chat"; card shows who closed an item and when,
  with a bulk marker
- triage: UNFILEABLE class -> top_real now ranks actionable errors only
  (first row went from an 18 203 fetch failure to the 989 toLowerCase runtime
  error); network/abort signatures move to policy_noise
- AGENTS.md: the chat plane documented as an intake

Verified: autoreview --dry-run over the 5 chat reports -> "nothing provable
(5 left for the operator)" (R6 refuses auto:false); maintain 16 PASS 0 FAIL;
feedback.html inline JS node --check OK; collect -> awaiting 5, chat_total 5.

1 files changed, 17 insertions, 1 deletions

diff --git a/scripts/newos4-triage.py b/scripts/newos4-triage.py
index ef05dc1..651b94d 100755
--- a/scripts/newos4-triage.py
+++ b/scripts/newos4-triage.py
@@ -16,6 +16,15 @@ STATE_DIR = '/var/lib/webx11/newos4-maintenance'
 STATE = os.path.join(STATE_DIR, 'state.json')
 
 NOISE = re.compile(r'(user aborted|aborted without reason|signal timed out|AbortError|TimeoutError)', re.I)
+# api/debug/report.php refuses network-class auto reports and the supervisor skips aborts by design,
+# so these can never become a card. Ranking them by count taught the operator to ignore top_real:
+# 18 203 / 16 540 / 13 407 / 423 sat above the only action-able runtime error (989). Measured 2026-11-02.
+UNFILEABLE = re.compile(r'(failed to fetch|fetch failed|networkerror|load failed|'
+                        r'aborted without reason|signal timed out|err_network)', re.I)
+
+
+def is_unfileable(msg):
+    return bool(UNFILEABLE.search(str(msg or '')))
 SELF = re.compile(r'/api/debug/(ingest|report)\.php', re.I)
 
 
@@ -156,7 +165,14 @@ def build(apply_fix=False):
             ({'message': safe(e.get('message'), 200), 'type': e.get('type'),
               'count': int(e.get('count') or 1), 'age_hours': age_hours(e.get('last_seen')),
               'frame': safe(e.get('frame'), 160),
-              'session': safe(e.get('session_id'), 40)} for e in buckets['real']),
+              'session': safe(e.get('session_id'), 40)} for e in buckets['real']
+              if not is_unfileable(e.get('message'))),
+            key=lambda x: -x['count'])[:10],
+        # Ranked separately: these can never become a card (policy), so they are not "top real".
+        'policy_noise': sorted(
+            ({'message': safe(e.get('message'), 200), 'type': e.get('type'),
+              'count': int(e.get('count') or 1), 'age_hours': age_hours(e.get('last_seen'))}
+             for e in buckets['real'] if is_unfileable(e.get('message'))),
             key=lambda x: -x['count'])[:10],
         'new_reports': [{'id': r.get('id'), 'title': safe(r.get('title'), 160),
                          'created_at': r.get('created_at'),