diff --git a/go.mod b/go.mod
index 098f6c8..49b021c 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module safesight-control
 
-go 1.23.3
+go 1.25.0
 
 require (
 	github.com/go-chi/chi/v5 v5.2.3
@@ -14,6 +14,7 @@ require (
 	github.com/ncruces/go-strftime v0.1.9 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	golang.org/x/sys v0.22.0 // indirect
+	golang.org/x/text v0.40.0 // indirect
 	modernc.org/libc v1.55.3 // indirect
 	modernc.org/mathutil v1.6.0 // indirect
 	modernc.org/memory v1.8.0 // indirect
diff --git a/go.sum b/go.sum
index 5be4d0b..fa1e0f8 100644
--- a/go.sum
+++ b/go.sum
@@ -15,6 +15,8 @@ github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qq
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
 golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.40.0 h1:Ub2Z6/xjgF1WrYQz2nuITOEegKFtiIy+rieRJ5lHZKs=
+golang.org/x/text v0.40.0/go.mod h1:hpnzDAfGV753zIKo+wk3u1bVKCGPbrnF7+7LBF/UHVY=
 modernc.org/libc v1.55.3 h1:AzcW1mhlPNrRtjS5sS+eW2ISCgSOLLNyFzRh/V3Qj/U=
 modernc.org/libc v1.55.3/go.mod h1:qFXepLhz+JjFThQ4kzwzOjA/y/artDeg+pcYnY+Q83w=
 modernc.org/mathutil v1.6.0 h1:fRe9+AmYlaej+64JsEEhoWuAYBkOtQiMEU7n/XgfYi4=
diff --git a/internal/web/ui.go b/internal/web/ui.go
index 4696280..e2a7efd 100644
--- a/internal/web/ui.go
+++ b/internal/web/ui.go
@@ -21,11 +21,13 @@ import (
     "strconv"
     "strings"
     "time"
+    "unicode/utf8"
 
 	"safesight-control/internal/models"
 	"safesight-control/internal/service"
 	"safesight-control/internal/storage"
 	"github.com/go-chi/chi/v5"
+	"golang.org/x/text/encoding/simplifiedchinese"
 )
 
 type UI struct {
@@ -3538,11 +3540,14 @@ func (u *UI) pageAssetVideoSources(w http.ResponseWriter, r *http.Request) {
         }
     }
     if data.AssetVideoSource == nil {
-        data.AssetVideoSource = &service.ConfigVideoSourceAsset{
-            SourceType:      "rtsp",
-            SourceTypeLabel: "RTSP",
+        if newMode {
+            data.AssetVideoSource = &service.ConfigVideoSourceAsset{
+                SourceType:      "rtsp",
+                SourceTypeLabel: "RTSP",
+            }
+            data.AssetVideoSourceEditing = true
         }
-        data.AssetVideoSourceEditing = true
+        // otherwise just leave nil → nothing selected, no editor shown
     } else {
         data.AssetVideoSourceEditing = newMode || editMode
     }
@@ -3622,7 +3627,25 @@ func (u *UI) actionVideoSourceCSVImport(w http.ResponseWriter, r *http.Request)
     }
     defer file.Close()
 
-    reader := csv.NewReader(file)
+    // Read raw bytes for encoding detection
+    rawBytes, err := io.ReadAll(file)
+    if err != nil {
+        http.Redirect(w, r, "/assets/video-sources?error="+urlQueryEscape("读取文件失败: "+err.Error()), http.StatusFound)
+        return
+    }
+    // Strip UTF-8 BOM if present
+    rawBytes = bytes.TrimPrefix(rawBytes, []byte("\xef\xbb\xbf"))
+    // Try UTF-8 first; if invalid, try GBK
+    if !utf8.Valid(rawBytes) {
+        decoder := simplifiedchinese.GBK.NewDecoder()
+        decoded, err := decoder.Bytes(rawBytes)
+        if err != nil {
+            http.Redirect(w, r, "/assets/video-sources?error="+urlQueryEscape("文件编码不支持，请保存为 UTF-8 格式"), http.StatusFound)
+            return
+        }
+        rawBytes = decoded
+    }
+    reader := csv.NewReader(bytes.NewReader(rawBytes))
     reader.LazyQuotes = true
     records, err := reader.ReadAll()
     if err != nil {
diff --git a/internal/web/ui/templates/assets.html b/internal/web/ui/templates/assets.html
index a1cba41..3b1d489 100644
--- a/internal/web/ui/templates/assets.html
+++ b/internal/web/ui/templates/assets.html
@@ -220,9 +220,14 @@ toggleIntegrationFields('{{.AssetIntegration.Type}}');
           <td>{{if .Config.Resolution}}{{.Config.Resolution}}{{else}}-{{end}}</td>
           <td class="mono">{{if .Config.FPS}}{{.Config.FPS}}{{else}}-{{end}}</td>
           <td>{{.RefCount}}</td>
+          <td>
+            <form method="post" action="/assets/video-sources/{{.Name}}/delete" style="display:inline" onsubmit="return confirm('删除 {{.Name}}？')">
+              <button class="btn-icon ghost" title="删除">&times;</button>
+            </form>
+          </td>
         </tr>
         {{else}}
-        <tr><td colspan="7"><div class="empty-state compact"><div class="empty-title">还没有视频源</div></div></td></tr>
+        <tr><td colspan="8"><div class="empty-state compact"><div class="empty-title">还没有视频源</div></div></td></tr>
         {{end}}
       </tbody>
     </table>