fix: update diff repair instructions in templates

Author: phodal

core/src/main/resources/genius/en/code/repair-diff.vm

@@ -1,4 +1,4 @@
-Please help me repair the diff, follow GNU unified diff format, and return all repaired code.
+Please according the diff to repair the code, and return the repaired final code.
 
 Here is the original code: ${context.oldCode}
 

core/src/main/resources/genius/zh/code/repair-diff.vm

@@ -1,7 +1,11 @@
-Please help me repair the diff, follow GNU unified diff format, and return all repaired code.
+请根据我的原始代码和失败的 patch，生成最终的完整代码。
 
-Here is the original code: ${context.oldCode}
+Here is the original code:
+
+${context.oldCode}
 
 Here is the patched code:
 
 ${context.patchedCode}
+
+请返回应用 patch 后的最终代码。