feat: 内容源管理优化与条目编辑功能

- 内容源管理：去掉人工录入卡片，AI 密钥保存后可返显并支持小眼睛切换，布局优化
- 内容管理：新增编辑按钮与编辑页，可调整条目全部字段与标签

src/views/admin.ejs

@@ -37,6 +37,7 @@
             <td class="mono"><%= fmtDate(e.updated_at) %></td>
             <td>
               <div class="row-actions">
+                <a class="btn btn-sm" href="/admin/entries/<%= e.id %>/edit">编辑</a>
                 <% if (e.status !== 'active') { %>
                 <button class="btn btn-sm" type="button" data-action="entry-status" data-id="<%= e.id %>" data-status="active">上架</button>
                 <% } else { %>
@@ -106,25 +107,29 @@
       <p class="anno">// sources: human + ai + feed · 自动拉取经 ingest/ 采集层进入待核验队列</p>
       <h1>内容源管理</h1>
 
-      <% for (const s of sources) { %>
+      <% for (const s of sources) { if (s.kind === 'human') continue; %>
       <div class="panel-box" style="margin-top:20px">
         <h3 style="display:flex;align-items:center;gap:10px">
           <span class="dot <%= s.enabled ? '' : 'dot-off' %>"></span> <%= s.name %>
           <span class="mono" style="font-weight:400;font-size:12px;color:var(--ink-dim)">kind: <%= s.kind %> · 已收录 <%= Number(s.entry_count) %> 条</span>
         </h3>
 
-        <% if (s.kind === 'human') { %>
-        <p style="font-size:13.5px;color:var(--ink-dim)">管理员与编辑在条目接口直接写入，始终可用，改动写入审计日志。</p>
-        <% } else if (s.kind === 'ai') { %>
+        <% if (s.kind === 'ai') { %>
         <div class="switchline">
           AI 录入接口启用
           <span class="mono"><%= s.enabled ? 'ON' : 'OFF' %></span>
         </div>
-        <form id="ai-key-form">
+        <form id="ai-key-form" style="margin-top:12px">
           <p style="font-size:13px;color:var(--ink-dim);margin-bottom:6px">设置新的 X-Ingest-Key（留空 = 关闭通道）</p>
-          <div style="display:flex;gap:10px;max-width:420px">
-            <input class="input" name="key" type="text" placeholder="sk-…" />
-            <button class="btn btn-sm" type="submit">保存密钥</button>
+          <div style="display:flex;gap:10px;align-items:center;flex-wrap:nowrap">
+            <div class="ai-key-field">
+              <input class="input" name="key" type="password" value="<%= s.api_key || '' %>" placeholder="sk-…" autocomplete="off" />
+              <button type="button" class="eye-toggle" data-eye-toggle aria-label="显示密钥">
+                <svg class="eye-open" viewBox="0 0 24 24" width="18" height="18" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M1 12s4-8 11-8 11 8 11 8-4 8-11 8-11-8-11-8z"/><circle cx="12" cy="12" r="3"/></svg>
+                <svg class="eye-closed" viewBox="0 0 24 24" width="18" height="18" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" hidden><path d="M17.94 17.94A10.07 10.07 0 0 1 12 20c-7 0-11-8-11-8a18.45 18.45 0 0 1 5.06-5.94M9.9 4.24A9.12 9.12 0 0 1 12 4c7 0 11 8 11 8a18.5 18.5 0 0 1-2.16 3.19m-6.72-1.07a3 3 0 1 1-4.24-4.24"/><line x1="1" y1="1" x2="23" y2="23"/></svg>
+              </button>
+            </div>
+            <button class="btn btn-sm" type="submit" style="flex:none">保存密钥</button>
           </div>
         </form>
         <p class="mono" style="margin-top:12px;font-size:12px;color:var(--ink-dim)">