fix: Mermaid diagram syntax error in README files

- Escape @ symbol in flowchart node labels
- Add double quotes around all node labels for safety

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: snoo

README.ko.md

@@ -36,16 +36,16 @@
 
 ```mermaid
 flowchart LR
-    A[🧑‍💻 Claude와 코딩] --> B{결정 내림?}
-    B -->|예| C[@codesyncer-decision 태그 추가]
-    B -->|아니오| D{추론 했음?}
-    D -->|예| E[@codesyncer-inference 태그 추가]
-    D -->|아니오| F[계속 코딩]
-    C --> G[📝 코드에 영구 저장]
+    A["🧑‍💻 Claude와 코딩"] --> B{"결정 내림?"}
+    B -->|예| C["codesyncer-decision 태그 추가"]
+    B -->|아니오| D{"추론 했음?"}
+    D -->|예| E["codesyncer-inference 태그 추가"]
+    D -->|아니오| F["계속 코딩"]
+    C --> G["📝 코드에 영구 저장"]
     E --> G
-    G --> H[🔄 다음 세션]
-    H --> I[Claude가 코드 읽음]
-    I --> J[✅ 맥락 복구 완료!]
+    G --> H["🔄 다음 세션"]
+    H --> I["Claude가 코드 읽음"]
+    I --> J["✅ 맥락 복구 완료!"]
 ```
 
 ```typescript

README.md

@@ -36,16 +36,16 @@
 
 ```mermaid
 flowchart LR
-    A[🧑‍💻 You code with Claude] --> B{Decision made?}
-    B -->|Yes| C[Add @codesyncer-decision tag]
-    B -->|No| D{Inference made?}
-    D -->|Yes| E[Add @codesyncer-inference tag]
-    D -->|No| F[Continue coding]
-    C --> G[📝 Saved in code forever]
+    A["🧑‍💻 You code with Claude"] --> B{"Decision made?"}
+    B -->|Yes| C["Add codesyncer-decision tag"]
+    B -->|No| D{"Inference made?"}
+    D -->|Yes| E["Add codesyncer-inference tag"]
+    D -->|No| F["Continue coding"]
+    C --> G["📝 Saved in code forever"]
     E --> G
-    G --> H[🔄 Next session]
-    H --> I[Claude reads code]
-    I --> J[✅ Context recovered!]
+    G --> H["🔄 Next session"]
+    H --> I["Claude reads code"]
+    I --> J["✅ Context recovered!"]
 ```
 
 ```typescript