Add PostToolUse hook to run PHPUnit tests after every code edit

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/settings.local.json

@@ -4,5 +4,20 @@
       "WebFetch(domain:docs.bsky.app)",
       "Bash(tea actions:*)"
     ]
+  },
+  "hooks": {
+    "PostToolUse": [
+      {
+        "matcher": "Edit|Write",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "vendor/bin/phpunit",
+            "timeout": 60,
+            "statusMessage": "Running PHPUnit tests..."
+          }
+        ]
+      }
+    ]
   }
 }