feat(life): add tags to life posts and feed filtering

Allow users to select tags when creating or editing life posts
Add tag tabs to the life feed for filtering posts by tag

frontend/src/i18n.ts

@@ -230,6 +230,10 @@ const messages = {
         bodyLabel: 'Post',
         bodyPlaceholder: 'Share a thought, tip, or discovery...',
         newPost: 'New Post',
+        tags: 'Tags',
+        allTags: 'All',
+        tagPlaceholder: 'Select tags',
+        searchTags: 'Search tags',
         search: 'Search Life',
         searchPlaceholder: 'Search post content...',
         searchEmpty: 'No posts match your search',
@@ -319,7 +323,8 @@ const messages = {
       itemCategories: 'Item categories',
       itemUsages: 'Item usages',
       acquisitionMethods: 'Acquisition methods',
-      maps: 'Maps'
+      maps: 'Maps',
+      lifeTags: 'Life tags'
     },
     appearance: {
       time: 'Time',
@@ -577,6 +582,10 @@ const messages = {
         bodyLabel: '动态内容',
         bodyPlaceholder: '分享一段想法、心得或发现……',
         newPost: 'New Post',
+        tags: '标签',
+        allTags: '全部',
+        tagPlaceholder: '选择标签',
+        searchTags: '搜索标签',
         search: '搜索动态',
         searchPlaceholder: '搜索动态内容……',
         searchEmpty: '没有匹配的动态',
@@ -666,7 +675,8 @@ const messages = {
       itemCategories: '物品分类',
       itemUsages: '物品用途',
       acquisitionMethods: '入手方式',
-      maps: '地图'
+      maps: '地图',
+      lifeTags: 'Life 标签'
     },
     appearance: {
       time: '时段',