v1.3.0: 修复pinmap_layout周长公式，新增PinList→PinMAP反向转换完整支持

Code/src/validator.py

@@ -115,7 +115,7 @@ def validate_pinlist_for_map(
     1. **Continuity** — pin numbers must start from 1 with no gaps.
     2. **Uniqueness** — no duplicate pin numbers.
     3. **Perimeter match** — total pin count must equal
-       2×rows + 2×cols − 4 (the grid perimeter).
+       (rows + cols) × 2 (the grid perimeter).
     4. **Non-multiple-of-4** — if pin count is not a multiple of 4,
        a warning is issued (but conversion is not blocked).
 
@@ -158,7 +158,8 @@ def validate_pinlist_for_map(
         ))
 
     # ── 3. Perimeter match ───────────────────────────────────────
-    expected_total = 2 * rows + 2 * cols - 4
+    # 周长公式：(rows + cols) * 2
+    expected_total = (rows + cols) * 2
     actual_total = len(entries)
     if actual_total != expected_total:
         result.errors.append(ValidationError(