[claude] Clean up sesh commit capture step

claude/.claude/settings.json

@@ -5,7 +5,7 @@
   "model": "sonnet",
   "hooks": {
     "Stop": [
-      { "hooks": [ { "type": "command", "command": "sesh capture --commit HEAD" } ] }
+      { "hooks": [ { "type": "command", "command": "sh -c 'h=$(git rev-parse HEAD 2>/dev/null); [ -z \"$h\" ] && exit 0; f=\"$(git rev-parse --git-dir 2>/dev/null)/.sesh_last_capture_head\"; [ \"$h\" = \"$(cat \"$f\" 2>/dev/null)\" ] && exit 0; sesh capture --commit HEAD && echo \"$h\" > \"$f\"'" } ] }
     ],
     "SubagentStop": [
       {