feat: Support multiple vector database selection, add InMemory and Qdrant adapters, introduce admin dashboard

Api/Management/SystemManageMentController.cs

@@ -0,0 +1,90 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using Foxel.Controllers;
+using Foxel.Models;
+using Foxel.Services.VectorDB;
+
+namespace Foxel.Api.Management;
+
+[Authorize(Roles = "Administrator")]
+[Route("api/management/system")]
+public class SystemManagementController(IVectorDbService vectorDbService) : BaseApiController
+{
+    private readonly VectorDbManager _vectorDbManager = (VectorDbManager)vectorDbService;
+
+    [HttpPost("vector-db/switch")]
+    public async Task<ActionResult<BaseResult<bool>>> SwitchVectorDb([FromBody] SwitchVectorDbRequest request)
+    {
+        try
+        {
+            // 将字符串转换为枚举类型（如果需要）
+            if (Enum.TryParse<VectorDbType>(request.Type, out var dbType))
+            {
+                await _vectorDbManager.SwitchVectorDbAsync(dbType);
+                return Success(true, $"已切换到 {request.Type} 向量数据库");
+            }
+            else
+            {
+                return Error<bool>($"无效的向量数据库类型: {request.Type}", 400);
+            }
+        }
+        catch (Exception ex)
+        {
+            return Error<bool>($"切换向量数据库失败: {ex.Message}", 500);
+        }
+    }
+
+    [HttpGet("vector-db/current")]
+    public ActionResult<BaseResult<VectorDbInfo>> GetCurrentVectorDb()
+    {
+        try
+        {
+            var currentType = _vectorDbManager.GetCurrentVectorDbType();
+            var info = new VectorDbInfo { Type = currentType.ToString() };
+            return Success(info, "获取当前向量数据库类型成功");
+        }
+        catch (Exception ex)
+        {
+            return Error<VectorDbInfo>($"获取当前向量数据库类型失败: {ex.Message}", 500);
+        }
+    }
+
+    [HttpDelete("vector-db/clear")]
+    public async Task<ActionResult<BaseResult<bool>>> ClearVectors()
+    {
+        try
+        {
+            await _vectorDbManager.ClearVectorsAsync();
+            return Success(true, "向量数据库清空成功");
+        }
+        catch (Exception ex)
+        {
+            return Error<bool>($"清空向量数据库失败: {ex.Message}", 500);
+        }
+    }
+
+    [HttpPost("vector-db/rebuild")]
+    public async Task<ActionResult<BaseResult<bool>>> RebuildVectors()
+    {
+        try
+        {
+            await _vectorDbManager.ClearVectorsAsync();
+            _ = _vectorDbManager.BuildUserPictureVectorsAsync();
+            return Success(true, "向量数据库重建中，请稍后检查状态");
+        }
+        catch (Exception ex)
+        {
+            return Error<bool>($"重建向量数据库失败: {ex.Message}", 500);
+        }
+    }
+}
+
+public class SwitchVectorDbRequest
+{
+    public string Type { get; set; } = string.Empty;
+}
+
+public class VectorDbInfo
+{
+    public string Type { get; set; } = string.Empty;
+}