Keep conversations, so a useful answer outlives the tab it was asked in

Deployment/master.conf.template

@@ -1645,6 +1645,20 @@
     AI_MEMORY_FILE="$DATA_DIR/ai_memory.md"
     AI_MEMORY_MAX_CHARS=4000        # ~1000 tokens — truncated with a notice if exceeded
 
+# ━━━ AI Stored Conversations ━━━
+# How many past conversations the AI tab and the Monitor tab's AI row keep. One JSON file per
+# conversation under DATA_DIR/ai_chats, saved automatically when a turn completes; the oldest
+# drop off once the count is exceeded.
+#
+# A cap rather than a retention age. These are read by picking one out of a short list, and a
+# list you have to scroll is a list you stop using — the useful window is the handful of things
+# you were recently working on, which is a count, not a date.
+#
+# Not indexed and never retrieved into a prompt on their own. A stored chat only re-enters the
+# model's context when the operator explicitly reopens it, and it is re-validated per message on
+# the way in, exactly as live history is.
+    AI_CHAT_HISTORY_MAX=10          # conversations kept — clamped to 1-50
+
 # ━━━ AI Token Accounting ━━━
 # One row per completed turn, appended by whichever path ran it — the WebGUI worker and the
 # ai_query.sh CLI both write here, so the totals are not silently the tab's alone. Format is