FeedLite 初始提交：通用轻量级反馈系统（PHP + SQLite，零依赖）

- 前台：问题列表 / 详情 / 发布与回复（趣味问答验证码、蜜罐、IP 限流）
- 后台：先审后显、站点设置（站点标题/描述、附件存储、OSS 参数）、操作日志
- 附件：关闭 / 本机硬盘 / 阿里云 OSS 浏览器直传（ECS 实例 RAM 角色）三种模式
- 品牌资源：全套图标（favicon.ico / SVG / PNG 各尺寸 / manifest）
- 安全：CSRF、session 加固、.htaccess 屏蔽敏感文件、口令仅存哈希
- 配置：config.example.php 为模板，config.php 不入库

index.php

@@ -0,0 +1,153 @@
+<?php
+/**
+ * 问题列表
+ */
+require __DIR__ . '/lib/bootstrap.php';
+
+$pdo      = fb_db();
+$cats     = fb_categories();
+$statuses = fb_statuses();
+
+$cat  = isset($_GET['cat'])    ? (string)$_GET['cat']    : '';
+$st   = isset($_GET['status']) ? (string)$_GET['status'] : '';
+$q    = isset($_GET['q'])      ? trim((string)$_GET['q']) : '';
+$sort = isset($_GET['sort'])   ? (string)$_GET['sort']   : 'active';
+
+if ($cat !== '' && !isset($cats[$cat]))     { $cat = ''; }
+if ($st  !== '' && !isset($statuses[$st]))  { $st  = ''; }
+if ($sort !== 'new')                        { $sort = 'active'; }
+
+$where = [];
+$args  = [];
+// 审核（先审后显）：访客只看已通过审核的；管理员登录审核后台后可看全部
+if (fb_moderation_on() && !fb_is_admin()) { $where[] = 'visible = 1'; }
+if ($cat !== '') { $where[] = 'category = ?'; $args[] = $cat; }
+if ($st  !== '') { $where[] = 'status = ?';   $args[] = $st; }
+if ($q   !== '') {
+    $like    = '%' . addcslashes($q, '%_\\') . '%';
+    $where[] = "(title LIKE ? ESCAPE '\\' OR body LIKE ? ESCAPE '\\')";
+    $args[]  = $like;
+    $args[]  = $like;
+}
+$wsql  = $where ? (' WHERE ' . implode(' AND ', $where)) : '';
+$order = ($sort === 'new') ? 'created_at DESC' : 'updated_at DESC';
+
+$stc = $pdo->prepare('SELECT COUNT(*) FROM threads' . $wsql);
+$stc->execute($args);
+$total = (int)$stc->fetchColumn();
+
+$pageSize = max(5, (int)fb_cfg('page_size', 20));
+$pages    = max(1, (int)ceil($total / $pageSize));
+$page     = isset($_GET['page']) ? (int)$_GET['page'] : 1;
+if ($page < 1)     { $page = 1; }
+if ($page > $pages){ $page = $pages; }
+$offset   = ($page - 1) * $pageSize;
+
+$sql = 'SELECT id, title, category, status, author_name, reply_count, created_at, updated_at,'
+     . ' substr(body, 1, 300) AS excerpt FROM threads'
+     . $wsql . ' ORDER BY ' . $order . ' LIMIT ' . $pageSize . ' OFFSET ' . $offset;
+$sth = $pdo->prepare($sql);
+$sth->execute($args);
+$threads = $sth->fetchAll();
+
+// 附件缩略图与数量（只在有附件时才有开销）
+$tids     = [];
+foreach ($threads as $t) { $tids[] = (int)$t['id']; }
+$attImgs  = $tids ? fb_attach_map_images($pdo, $tids, 3) : [];
+$attCount = $tids ? fb_attach_count_map($pdo, $tids)  : [];
+
+fb_layout_head('全部问题');
+?>
+
+<div class="page-head">
+  <div>
+    <h1>全部问题</h1>
+    <p class="muted"><?php echo e((string)fb_cfg('site_desc')); ?></p>
+  </div>
+  <a class="btn primary" href="new.php">我要反馈</a>
+</div>
+
+<div class="filters">
+  <div class="chips">
+    <a class="chip <?php echo $cat === '' ? 'on' : ''; ?>" href="<?php echo e(fb_qs(['cat' => null, 'page' => null]) ?: '?'); ?>">全部</a>
+    <?php foreach ($cats as $k => $v): ?>
+      <a class="chip <?php echo $cat === $k ? 'on' : ''; ?>" href="<?php echo e(fb_qs(['cat' => $k, 'page' => null])); ?>"><?php echo e($v); ?></a>
+    <?php endforeach; ?>
+  </div>
+  <form class="filter-row" method="get" action="">
+    <input type="hidden" name="cat" value="<?php echo e($cat); ?>">
+    <select name="status" onchange="this.form.submit()">
+      <option value="">全部状态</option>
+      <?php foreach ($statuses as $k => $v): ?>
+        <option value="<?php echo e($k); ?>" <?php echo $st === $k ? 'selected' : ''; ?>><?php echo e($v); ?></option>
+      <?php endforeach; ?>
+    </select>
+    <select name="sort" onchange="this.form.submit()">
+      <option value="active" <?php echo $sort === 'active' ? 'selected' : ''; ?>>按最新回复</option>
+      <option value="new"    <?php echo $sort === 'new'    ? 'selected' : ''; ?>>按最新发布</option>
+    </select>
+    <input type="search" name="q" value="<?php echo e($q); ?>" placeholder="搜索标题或内容…">
+    <button class="btn" type="submit">搜索</button>
+  </form>
+</div>
+
+<div class="list">
+<?php if (!$threads): ?>
+  <div class="empty">
+    <p>还没有符合条件的问题。</p>
+    <p><a class="btn primary" href="new.php">来提第一个吧</a></p>
+  </div>
+<?php else: ?>
+  <?php foreach ($threads as $t): ?>
+    <a class="item" href="thread.php?id=<?php echo (int)$t['id']; ?>">
+      <div class="item-top">
+        <span class="badge cat"><?php echo e(fb_category_label($t['category'])); ?></span>
+        <span class="badge st st-<?php echo e($t['status']); ?>"><?php echo e(fb_status_label($t['status'])); ?></span>
+        <span class="item-title"><?php echo e($t['title']); ?></span>
+        <span class="item-id" title="问题编号">#<?php echo (int)$t['id']; ?></span>
+      </div>
+      <p class="item-ex"><?php echo e(fb_excerpt($t['excerpt'], 120)); ?></p>
+      <?php if (!empty($attImgs[(int)$t['id']])): ?>
+        <div class="thumbs">
+          <?php foreach ($attImgs[(int)$t['id']] as $im): ?>
+            <img loading="lazy" alt="" src="<?php echo e(fb_attach_thumb_url($im['oss_key'], 200, isset($im['mime']) ? $im['mime'] : '')); ?>">
+          <?php endforeach; ?>
+        </div>
+      <?php endif; ?>
+      <div class="item-meta">
+        <span class="who"><?php echo e($t['author_name']); ?></span>
+        <span class="dot">·</span>
+        <span><?php echo e(fb_fmt_time($t['updated_at'])); ?></span>
+        <span class="dot">·</span>
+        <span><?php echo (int)$t['reply_count']; ?> 条回复</span>
+        <?php if (!empty($attCount[(int)$t['id']])): ?>
+          <span class="dot">·</span>
+          <span class="att-tag">附件 <?php echo (int)$attCount[(int)$t['id']]; ?></span>
+        <?php endif; ?>
+      </div>
+    </a>
+  <?php endforeach; ?>
+<?php endif; ?>
+</div>
+
+<?php if ($pages > 1): ?>
+  <div class="pager">
+    <?php
+      $mk = function ($p) {
+          return e(fb_qs(['page' => $p <= 1 ? null : $p]) ?: '?');
+      };
+    ?>
+    <?php if ($page > 1): ?>
+      <a class="btn" href="<?php echo $mk($page - 1); ?>">上一页</a>
+    <?php endif; ?>
+    <span class="pager-info">第 <?php echo (int)$page; ?> / <?php echo (int)$pages; ?> 页 · 共 <?php echo (int)$total; ?> 个问题</span>
+    <?php if ($page < $pages): ?>
+      <a class="btn" href="<?php echo $mk($page + 1); ?>">下一页</a>
+    <?php endif; ?>
+  </div>
+<?php elseif ($total > 0): ?>
+  <div class="pager"><span class="pager-info">共 <?php echo (int)$total; ?> 个问题</span></div>
+<?php endif; ?>
+
+<?php
+fb_layout_foot();