style: 操作列统一左对齐（撤销右对齐）

UsersView 移除 align=right，三页移除 .op-col 应用，base.css 删除 .op-col 定义；规范13.4 改为左对齐

frontend/src/styles/base.css

@@ -146,9 +146,6 @@ html[data-theme="dark"] .ambient::after {
 }
 .btn.op-btn-cell + .btn.op-btn-cell { margin-left: 7px; }
 
-/* 表格操作列：统一右对齐（th/td 通用） */
-.op-col { text-align: right; }
-
 /* —— 标签（状态标签体系） —— */
 .tag {
   display: inline-flex;

frontend/src/views/IgnoredView.vue

@@ -64,7 +64,7 @@ async function doUnignore(pkg) {
             <th style="width: 140px">版本数</th>
             <th style="width: 150px">占用空间</th>
             <th style="width: 170px">忽略时间</th>
-            <th style="width: 130px" class="op-col">操作</th>
+            <th style="width: 130px">操作</th>
           </tr>
         </thead>
         <tbody>
@@ -74,7 +74,7 @@ async function doUnignore(pkg) {
             <td><span class="num-cell">{{ p.versions }}</span></td>
             <td><span class="num-cell">{{ fmtSize(p.size) }}</span></td>
             <td><span class="ign-time">{{ p.ignoredAt || '—' }}</span></td>
-            <td class="op-col">
+            <td>
               <button class="btn unignore op-btn-cell" @click="doUnignore(p)">↩️ 移出忽略</button>
             </td>
           </tr>

frontend/src/views/LogsView.vue

@@ -373,7 +373,7 @@ function detailTitle(log) {
         <tbody>
           <template v-for="(log, i) in state.logs" :key="log.id">
             <tr @click="detail = log">
-              <td v-for="c in activeCols" :key="c.key" :class="c.key === 'op' ? 'op-col' : ''" @click.stop>
+              <td v-for="c in activeCols" :key="c.key" @click.stop>
                 <template v-if="c.key === 'op'">
                   <button class="btn unignore op-btn-cell" @click.stop="detail = log">详情</button>
                 </template>

frontend/src/views/SearchView.vue

@@ -470,7 +470,7 @@ async function submitPull() {
             <td><span class="num-cell">{{ fmtSize(p.size) }}</span></td>
             <td><span class="date-cell">{{ p.lastUpdated || '—' }}</span></td>
             <td><StatusTag :status="p.status" /></td>
-            <td class="op-col" @click.stop>
+            <td @click.stop>
               <template v-if="p.status === 'warn'">
                 <button class="btn clean op-btn-cell" @click="openClean(p)">清理</button>
                 <button class="btn ignore op-btn-cell" @click="doIgnore(p)">忽略</button>

frontend/src/views/UsersView.vue

@@ -40,7 +40,7 @@
             <span class="cell-time">{{ createdAt(row) }}</span>
           </template>
         </el-table-column>
-        <el-table-column label="操作" width="176" align="right">
+        <el-table-column label="操作" width="176">
           <template #default="{ row }">
             <button class="btn ignore op-btn-cell" :disabled="row.source === 'builtin'" @click="openPwd(row)">修改密码</button>
             <button class="btn remove op-btn-cell" :disabled="row.source === 'builtin' || row.name === currentName" @click="del(row)">删除</button>