feat: 公司名称配置项，显示在侧边栏底部

internal/config/config.go

@@ -19,6 +19,7 @@ type Config struct {
     LogDir             string            `json:"log_dir,omitempty"`
     MediaRepoPath      string            `json:"media_repo_path,omitempty"` // explicit import-only source; not used for runtime rendering
     AlarmRetentionDays int               `json:"alarm_retention_days"`     // auto-delete alarms older than N days, 0=keep forever
+    CompanyName        string            `json:"company_name,omitempty"`
     DeviceAliases      map[string]string `json:"device_aliases,omitempty"`
     path               string
 }

internal/web/ui.go

@@ -116,6 +116,7 @@ type PageData struct {
     StaleCount               int
     SystemAlarmRetention     int
     SystemConcurrency        int
+    SystemCompanyName        string
     AlarmFilterDevices       []string
     AlarmFilterRuleTypes     []string
     SelectedAlarmDevice      string
@@ -879,6 +880,11 @@ func (u *UI) Routes() (chi.Router, error) {
 func (u *UI) render(w http.ResponseWriter, r *http.Request, content string, data PageData) {
     data.Version = version
     data.Year = time.Now().Year()
+    if u.cfg != nil {
+        if data.SystemCompanyName == "" {
+            data.SystemCompanyName = u.cfg.CompanyName
+        }
+    }
     if u.alarmCollector != nil {
         data.UnacknowledgedAlarmCount = u.alarmCollector.GetUnacknowledgedCount()
     }
@@ -4283,32 +4289,35 @@ func (u *UI) renderSystemPage(w http.ResponseWriter, r *http.Request, status int
     }
     if u.cfg != nil {
         data.SystemAlarmRetention = u.cfg.AlarmRetentionDays
+        data.SystemCompanyName = u.cfg.CompanyName
     }
     u.render(w, r, "system", data)
 }
 
 func (u *UI) actionSystemConfig(w http.ResponseWriter, r *http.Request) {
     _ = r.ParseForm()
+    changed := false
     if days, err := strconv.Atoi(strings.TrimSpace(r.FormValue("alarm_retention_days"))); err == nil && days >= 0 {
         if u.alarmCollector != nil {
             u.alarmCollector.SetRetention(days)
             go u.alarmCollector.RunCleanup()
         }
-        // Write back to config file
-        if u.cfg != nil && strings.TrimSpace(u.configPath) != "" {
+        if u.cfg != nil {
             u.cfg.AlarmRetentionDays = days
-            if data, err := json.MarshalIndent(u.cfg, "", "  "); err == nil {
-                os.WriteFile(u.configPath, data, 0o644)
-            }
         }
-        msg := "告警保留已设为 " + strconv.Itoa(days) + " 天"
-        if days == 0 {
-            msg = "告警将永久保留"
-        }
-        u.renderSystemPage(w, r, http.StatusOK, msg, "")
-        return
+        changed = true
     }
-    u.renderSystemPage(w, r, http.StatusBadRequest, "", "请输入有效的保留天数")
+    company := strings.TrimSpace(r.FormValue("company_name"))
+    if company != "" && u.cfg != nil {
+        u.cfg.CompanyName = company
+        changed = true
+    }
+    if changed && u.cfg != nil && strings.TrimSpace(u.configPath) != "" {
+        if data, err := json.MarshalIndent(u.cfg, "", "  "); err == nil {
+            os.WriteFile(u.configPath, data, 0o644)
+        }
+    }
+    u.renderSystemPage(w, r, http.StatusOK, "配置已保存", "")
 }
 
 func (u *UI) actionSystemDBRestore(w http.ResponseWriter, r *http.Request) {

internal/web/ui/templates/layout.html

@@ -57,7 +57,7 @@
           <span class="mode-track"><span class="mode-thumb"></span></span>
           <span class="mode-label mode-label-right">专家</span>
         </div>
-        <div>北京泰奥理科技有限公司</div>
+        <div>{{if .SystemCompanyName}}{{.SystemCompanyName}}{{else}}SafeSight{{end}}</div>
         <div>&copy; {{.Year}} V{{.Version}}</div>
       </div>
     </aside>

internal/web/ui/templates/system.html

@@ -42,6 +42,7 @@
     <form method="post" action="/system/config">
       <div class="field-grid">
         <label><span>告警保留天数</span><input type="number" name="alarm_retention_days" value="{{.SystemAlarmRetention}}" min="0" /><div class="form-hint">0=永久保留</div></label>
+        <label><span>公司名称</span><input type="text" name="company_name" value="{{.SystemCompanyName}}" placeholder="将在页面底部显示" /></label>
       </div>
       <div class="actions" style="margin-top:12px">
         <button type="submit" class="secondary">保存配置</button>