feat: 问诊对话+建档引导+报告+日历+趋势页重写+视觉统一

- 问诊对话页: 新建consultation_provider, 完整AI分身聊天UI
- 首次建档引导: OnboardingPrompt+ManageArchiveTool+前端卡片
- 报告模块: POST端点 + report_agent_handler接VLM
- 健康日历: GET /api/calendar端点 + 前端接API
- 趋势页重写: 删除Mock数据 + 真实API + 手动录入
- 饮食保存: submit按钮接后端API
- 侧边栏: 健康概览横排 + 统一紫色配色
- 运动计划: 修复JSON反序列化(record→手动解析)
- VLM: prompt优化 + 模型切qwen3-vl-plus + 1280px压缩
- UI颜色: 加深主色 8B9CF7→6C5CE7
- 个人信息页精简 + 健康档案可编辑重设计
- 保洁: 删除无用agent_bar + 删除意见反馈/关于我们
- 新增AI提示词文档

backend/src/Health.WebApi/Endpoints/report_endpoints.cs

@@ -19,8 +19,26 @@ public static class ReportEndpoints
             var report = await db.Reports.FirstOrDefaultAsync(r => r.Id == id && r.UserId == userId, ct);
             return report == null ? Results.Ok(new { code = 40004, message = "不存在" }) : Results.Ok(new { code = 0, data = report, message = (string?)null });
         });
+
+        group.MapPost("/", async (CreateReportRequest req, HttpContext http, AppDbContext db, CancellationToken ct) =>
+        {
+            var userId = GetUserId(http);
+            var report = new Report
+            {
+                Id = Guid.NewGuid(), UserId = userId,
+                FileUrl = req.FileUrl, FileType = req.FileType,
+                Category = req.Category ?? ReportCategory.Other,
+                Status = ReportStatus.PendingDoctor,
+                CreatedAt = DateTime.UtcNow,
+            };
+            db.Reports.Add(report);
+            await db.SaveChangesAsync(ct);
+            return Results.Ok(new { code = 0, data = new { report.Id }, message = (string?)null });
+        });
     }
 
     private static Guid GetUserId(HttpContext http) =>
         Guid.TryParse(http.User.FindFirst(System.Security.Claims.ClaimTypes.NameIdentifier)?.Value, out var id) ? id : Guid.Empty;
 }
+
+public sealed record CreateReportRequest(string FileUrl, ReportFileType FileType, ReportCategory? Category);