v1.8.59: fix @staticmethod bug in SQL/PHP format converters

_sql_val and _php_val were @staticmethod but called via self —
caused "takes 1 positional argument but 2 were given" error.
Converted to regular methods. All 16 formats tested OK.

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

gui/tabs/query_tab.py

@@ -763,8 +763,7 @@ class QueryTab(ctk.CTkFrame):
             lines.append(f"UPDATE `{tbl}` SET {sets} WHERE {where};")
         return "\n".join(lines)
 
-    @staticmethod
-    def _sql_val(v) -> str:
+    def _sql_val(self, v) -> str:
         if v is None or str(v) == "NULL":
             return "NULL"
         s = str(v)
@@ -805,8 +804,7 @@ class QueryTab(ctk.CTkFrame):
         lines.append("]")
         return "\n".join(lines)
 
-    @staticmethod
-    def _php_val(v) -> str:
+    def _php_val(self, v) -> str:
         if v is None or str(v) == "NULL":
             return "null"
         s = str(v)