fix(claude): change defaultMode to plan

Set defaultMode to "plan" instead of "acceptEdits" to ensure Claude Code
starts in plan mode by default, preventing unintended edits.

Author: atxtechbro

.claude/settings.json

@@ -3,7 +3,7 @@
   "cleanupPeriodDays": 90,
   "forceLoginMethod": "claudeai",
   "permissions": {
-    "defaultMode": "acceptEdits",
+    "defaultMode": "plan",
     "allow": [
       "LS",
       "Read",