feat: 实现模板解析，自动识别 {{占位符}}

python/parser.py

@@ -1 +1,24 @@
-# placeholder
+import re
+from openpyxl import load_workbook
+
+PLACEHOLDER_RE = re.compile(r"\{\{(.+?)\}\}")
+
+def parse_template(file_path: str) -> dict:
+    wb = load_workbook(file_path, data_only=False)
+    sheets = wb.sheetnames
+    placeholders = []
+
+    for sheet_name in sheets:
+        ws = wb[sheet_name]
+        for row in ws.iter_rows():
+            for cell in row:
+                if cell.value and isinstance(cell.value, str):
+                    m = PLACEHOLDER_RE.search(cell.value)
+                    if m:
+                        placeholders.append({
+                            "name": m.group(1),
+                            "sheet": sheet_name,
+                            "cell": cell.coordinate,
+                        })
+
+    return {"sheets": sheets, "placeholders": placeholders}