feat(grouping): 新增分组功能并优化 Markdown 文件操作

- 新增分组实体、控制器、服务和映射器
- 实现分组创建、获取、更新和删除接口
- 优化 Markdown 文件创建、获取和删除接口- 新增全局异常处理和日志记录
- 更新数据库表结构和字段类型
- 重构前端页面，支持分组和 Markdown 文件展示

biji-houdaun/src/main/java/com/test/bijihoudaun/controller/MarkdownController.java

@@ -1,5 +1,6 @@
 package com.test.bijihoudaun.controller;
 
+import com.test.bijihoudaun.common.response.R;
 import com.test.bijihoudaun.entity.MarkdownFile;
 import com.test.bijihoudaun.service.MarkdownFileService;
 import io.swagger.v3.oas.annotations.Operation;
@@ -9,6 +10,9 @@ import io.swagger.v3.oas.annotations.tags.Tag;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
 @Tag(name = "markdown接口")
 @RestController
 @RequestMapping("/api/markdown")
@@ -17,6 +21,13 @@ public class MarkdownController {
     @Autowired
     private MarkdownFileService markdownFileService;
 
+    @Operation(summary = "测试")
+    @GetMapping("/test")
+    public R<List<MarkdownFile>> test() {
+        List<MarkdownFile> test = markdownFileService.test();
+        return R.success(test);
+    }
+
     @Operation(summary = "预览markdown文件")
     @Parameters({
         @Parameter(name = "id", description = "文件ID", required = true)
@@ -32,20 +43,20 @@ public class MarkdownController {
 
     @Operation(summary = "创建markdown文件")
     @Parameters({
-            @Parameter(name = "userId", description = "用户id",required = true),
+            @Parameter(name = "groupingId", description = "分组id",required = true),
             @Parameter(name = "title", description = "标题",required = true),
             @Parameter(name = "fileName", description = "文件名",required = true),
             @Parameter(name = "content", description = "内容",required = true)
     })
     @PostMapping
     public ResponseEntity<MarkdownFile> createMarkdown(
-            @RequestParam Long userId,
+            @RequestParam Long groupingId,
             @RequestParam String title,
             @RequestParam String fileName,
             @RequestBody String content) {
 
         MarkdownFile file = markdownFileService.createMarkdownFile(
-                userId, title, fileName, content);
+                groupingId, title, fileName, content);
 
         return ResponseEntity.ok(file);
     }
@@ -67,4 +78,28 @@ public class MarkdownController {
         }
         return ResponseEntity.notFound().build();
     }
+
+    @Operation(summary = "获取所有Markdown文件")
+    @GetMapping
+    public ResponseEntity<List<MarkdownFile>> getAllMarkdownFiles() {
+        // 固定用户ID=1，因为是个人笔记
+        List<MarkdownFile> files = markdownFileService.getAllMarkdownFiles();
+        return ResponseEntity.ok(files);
+    }
+    
+    @Operation(summary = "删除Markdown文件")
+    @DeleteMapping("/{id}")
+    public ResponseEntity<Void> deleteMarkdown(@PathVariable Long id) {
+        if (markdownFileService.deleteMarkdownFile(id)) {
+            return ResponseEntity.noContent().build();
+        }
+        return ResponseEntity.notFound().build();
+    }
+    
+    @Operation(summary = "根据分组ID获取Markdown文件")
+    @GetMapping("/grouping/{groupingId}")
+    public ResponseEntity<List<MarkdownFile>> getFilesByGroupingId(@PathVariable String groupingId) {
+        List<MarkdownFile> files = markdownFileService.getFilesByGroupingId(groupingId);
+        return ResponseEntity.ok(files);
+    }
 }