fix(settings): scope graphify pretool hook to Bash search commands

Matcher was Glob|Grep — those tool inputs have no `command` field, so
the hint never fired. Switch to Bash matcher and gate on the actual
command substring (grep, rg, ripgrep, find, fd, ack, ag) so the
graphify hint only injects when Claude is about to scan raw files.

Co-Authored-By: Claude <noreply@anthropic.com>

.claude/settings.json

@@ -2,11 +2,11 @@
   "hooks": {
     "PreToolUse": [
       {
-        "matcher": "Glob|Grep",
+        "matcher": "Bash",
         "hooks": [
           {
             "type": "command",
-            "command": "[ -f graphify-out/graph.json ] && echo '{\"hookSpecificOutput\":{\"hookEventName\":\"PreToolUse\",\"additionalContext\":\"graphify: Knowledge graph exists. Read graphify-out/GRAPH_REPORT.md for god nodes and community structure before searching raw files.\"}}' || true"
+            "command": "CMD=$(python3 -c \"import json,sys; d=json.load(sys.stdin); print(d.get('tool_input',d).get('command',''))\" 2>/dev/null || true); case \"$CMD\" in *grep*|*rg\\ *|*ripgrep*|*find\\ *|*fd\\ *|*ack\\ *|*ag\\ *)   [ -f graphify-out/graph.json ] &&   echo '{\"hookSpecificOutput\":{\"hookEventName\":\"PreToolUse\",\"additionalContext\":\"graphify: Knowledge graph exists. Read graphify-out/GRAPH_REPORT.md for god nodes and community structure before searching raw files.\"}}'   || true ;; esac"
           }
         ]
       }