feat: unify network and topology table column filters

Replace top filter bars with shared Excel-style column menus, fix select-all and modal interactions, and use plain dropdown indicators. Apply exact-value filters before pagination and export. Isolate pytest database state and cover filter behavior.

web/src/i18n/locales/en/networkDevices.ts

@@ -3,6 +3,18 @@ const networkDevices = {
   keywordPh: "Name / IP / ID",
   allSource: "All sources",
   empty: "No network elements.",
+  emptyFiltered: "No network elements match these filters. Adjust or clear the filters.",
+  columnFilterPh: "Search values",
+  selectAllColumnValues: "Select all",
+  applyColumnFilter: "Apply",
+  clearColumnFilter: "Clear filter",
+  blankFilterValue: "(Blanks)",
+  loadingFilterOptions: "Loading values…",
+  noFilterOptions: "No values available",
+  cancelColumnFilter: "Cancel",
+  filterOptionsError: "Failed to load values",
+  retryFilterOptions: "Retry",
+  moreFilterOptions: "Show more",
   exportName: "network-devices",
   col: {
     source: "Source",

web/src/i18n/locales/en/ume.ts

@@ -271,6 +271,7 @@ const ume = {
       hostName: "Host",
       neType: "NE type",
       cause: "Cause",
+      cleared: "Cleared status",
     },
   },
 };

web/src/i18n/locales/zh/networkDevices.ts

@@ -3,6 +3,18 @@ const networkDevices = {
   keywordPh: "名称 / IP / ID",
   allSource: "全部来源",
   empty: "暂无网元。",
+  emptyFiltered: "没有符合当前筛选条件的网元，请调整或清除筛选条件。",
+  columnFilterPh: "搜索值",
+  selectAllColumnValues: "全选",
+  applyColumnFilter: "应用",
+  clearColumnFilter: "清除筛选",
+  blankFilterValue: "（空白）",
+  loadingFilterOptions: "正在加载选项…",
+  noFilterOptions: "没有可选值",
+  cancelColumnFilter: "取消",
+  filterOptionsError: "选项加载失败",
+  retryFilterOptions: "重试",
+  moreFilterOptions: "显示更多",
   exportName: "network-devices",
   col: {
     source: "来源",

web/src/i18n/locales/zh/ume.ts

@@ -271,6 +271,7 @@ const ume = {
       hostName: "主机名",
       neType: "网元类型",
       cause: "原因",
+      cleared: "清除状态",
     },
   },
 };