merge: 合并 shadcn 风格 UI 优化

app/db.py

@@ -5,6 +5,7 @@ from datetime import UTC, datetime
 
 from sqlalchemy import Engine, create_engine, event
 from sqlalchemy.orm import DeclarativeBase, Session, sessionmaker
+from sqlalchemy.pool import NullPool
 
 from app.config import get_settings
 
@@ -20,7 +21,10 @@ def create_sqlite_engine(database_url: str):
             db_path.parent.mkdir(parents=True, exist_ok=True)
 
     connect_args = {"check_same_thread": False, "timeout": 10}
-    engine = create_engine(database_url, connect_args=connect_args)
+    engine_kwargs = {"connect_args": connect_args}
+    if database_url.startswith("sqlite:///") and database_url != "sqlite:///:memory:":
+        engine_kwargs["poolclass"] = NullPool
+    engine = create_engine(database_url, **engine_kwargs)
     engine.dialect.connect_args = connect_args
 
     @event.listens_for(engine, "connect")

app/platforms/base.py

@@ -94,15 +94,36 @@ class TikHubClient:
                     status_code=response.status_code,
                 )
             if response.is_error:
+                if attempt >= self.max_retries:
                     raise PlatformAPIError(
-                    f"External API returned HTTP {response.status_code}",
+                        self._format_api_error(response),
                         error_type="api_error",
                         status_code=response.status_code,
                     )
+                time.sleep(2**attempt)
+                continue
             return response.json()
 
         raise PlatformAPIError("External API request failed", error_type="api_error", status_code=last_status)
 
+    def _format_api_error(self, response: httpx.Response) -> str:
+        message = f"External API returned HTTP {response.status_code}"
+        detail = self._response_error_detail(response)
+        return f"{message}: {detail}" if detail else message
+
+    def _response_error_detail(self, response: httpx.Response) -> str | None:
+        try:
+            payload = response.json()
+        except ValueError:
+            text = response.text.strip()
+            return text[:200] if text else None
+        if isinstance(payload, dict):
+            for key in ("message_zh", "message", "error", "detail"):
+                value = payload.get(key)
+                if value:
+                    return str(value)[:200]
+        return None
+
 
 def parse_timestamp(value: Any) -> datetime | None:
     if value in (None, ""):

app/services/task_service.py

@@ -3,6 +3,7 @@ import json
 from concurrent.futures import ThreadPoolExecutor
 from collections.abc import Callable
 from datetime import UTC, datetime
+from zoneinfo import ZoneInfo
 
 from sqlalchemy import func, select
 from sqlalchemy.orm import Session, sessionmaker
@@ -22,6 +23,7 @@ RUNNING_TASK_MESSAGE = "当前有正在运行的任务，请稍后再试"
 RESTART_ERROR_MESSAGE = "系统重启，任务被中断"
 STALE_PROGRESS_THRESHOLD_SECONDS = 10 * 60
 STALE_PROGRESS_ERROR_TYPE = "stale_progress_timeout"
+DISPLAY_TIMEZONE = ZoneInfo("Asia/Shanghai")
 task_executor = ThreadPoolExecutor(max_workers=1)
 
 
@@ -183,10 +185,7 @@ def hydrate_task_progress(session: Session, task: Task) -> Task:
     task.display_number = display_number
     task.display_id = str(display_number)
     task.created_at_label = format_datetime_minute(task.created_at)
-    task.scale_label = (
+    task.scale_label = f"{task.hotspot_limit}热点 × {task.item_limit_per_hotspot}内容 × {task.comment_limit_per_item}评论"
-        f"{PLATFORM_LABELS.get(task.platform, task.platform)} · "
-        f"{task.hotspot_limit}热点 × {task.item_limit_per_hotspot}内容 × {task.comment_limit_per_item}评论"
-    )
     task.error_summary = build_task_error_summary(task)
     task.hotspots_count = session.scalar(select(func.count(Hotspot.id)).where(Hotspot.task_id == task.id)) or 0
     task.comments_count = session.scalar(select(func.count(Comment.id)).where(Comment.task_id == task.id)) or 0
@@ -230,7 +229,7 @@ def calculate_task_display_number(session: Session, task: Task) -> int:
 
 def format_datetime_minute(value: datetime | None) -> str:
     value = ensure_utc_datetime(value)
-    return value.strftime("%Y-%m-%d %H:%M") if value else ""
+    return value.astimezone(DISPLAY_TIMEZONE).strftime("%Y-%m-%d %H:%M") if value else ""
 
 
 def build_task_error_summary(task: Task) -> str | None:

app/static/app.css

@@ -1,101 +1,537 @@
+:root {
+  --background: #f8fafc;
+  --foreground: #0f172a;
+  --muted: #f1f5f9;
+  --muted-foreground: #64748b;
+  --card: #ffffff;
+  --card-foreground: #0f172a;
+  --border: #e2e8f0;
+  --input: #cbd5e1;
+  --primary: #0f172a;
+  --primary-foreground: #ffffff;
+  --secondary: #f1f5f9;
+  --secondary-foreground: #0f172a;
+  --accent: #f8fafc;
+  --accent-foreground: #0f172a;
+  --destructive: #dc2626;
+  --success: #16a34a;
+  --warning: #d97706;
+  --ring: rgba(15, 23, 42, 0.18);
+  --radius: 8px;
+}
+
 body {
-  background: #f5f7fb;
+  background: var(--background);
-  color: #172033;
+  color: var(--foreground);
-}
+  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
-
-.card {
-  border-radius: 8px;
-  border: 1px solid #dfe5ef;
-  box-shadow: 0 10px 28px rgba(31, 42, 68, 0.06);
-}
-
-.navbar {
-  background: #fff !important;
-}
-
-.hero-band {
-  align-items: flex-end;
-  background:
-    linear-gradient(135deg, rgba(12, 22, 40, 0.92), rgba(29, 80, 108, 0.78)),
-    url("https://images.unsplash.com/photo-1551288049-bebda4e38f71?auto=format&fit=crop&w=1600&q=80");
-  background-position: center;
-  background-size: cover;
-  border-radius: 8px;
-  color: #fff;
-  display: flex;
-  justify-content: space-between;
-  min-height: 300px;
-  padding: 42px;
-}
-
-.hero-copy {
-  max-width: 680px;
-}
-
-.hero-copy h1 {
-  font-size: 48px;
-  font-weight: 700;
   letter-spacing: 0;
-  margin-bottom: 14px;
+  min-height: 100vh;
 }
 
-.hero-copy p:not(.eyebrow) {
+a {
-  color: rgba(255, 255, 255, 0.84);
+  color: inherit;
-  font-size: 18px;
+}
-  line-height: 1.7;
+
+.container {
+  max-width: 1180px;
+}
+
+.app-navbar {
+  background: rgba(255, 255, 255, 0.92) !important;
+  border-bottom: 1px solid var(--border);
+  backdrop-filter: blur(14px);
+}
+
+.app-navbar .container {
+  min-height: 56px;
+}
+
+.navbar-brand {
+  color: var(--foreground);
+  font-size: 15px;
+  letter-spacing: 0;
+}
+
+.nav-link {
+  border-radius: 6px;
+  color: var(--muted-foreground);
+  font-size: 14px;
+  padding: 6px 10px;
+}
+
+.nav-link:hover {
+  background: var(--secondary);
+  color: var(--foreground);
+}
+
+.breadcrumb {
+  color: var(--muted-foreground);
+  font-size: 13px;
+  margin-bottom: 20px;
+}
+
+.breadcrumb a {
+  color: var(--muted-foreground);
+  text-decoration: none;
+}
+
+.breadcrumb a:hover {
+  color: var(--foreground);
+}
+
+.tool-card,
+.card,
+.accordion-item {
+  background: var(--card);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
+  color: var(--card-foreground);
+  overflow: hidden;
+}
+
+.card-body {
+  padding: 20px;
+}
+
+.card-header,
+.section-heading {
+  background: var(--card);
+  border-bottom: 1px solid var(--border);
+  padding: 16px 20px;
+}
+
+.section-heading {
+  align-items: center;
+  display: flex;
+  gap: 16px;
+  justify-content: space-between;
+}
+
+.section-heading h2,
+.page-heading h1,
+.page-title {
+  color: var(--foreground);
+  font-size: 22px;
+  font-weight: 650;
+  letter-spacing: 0;
+  line-height: 1.25;
   margin: 0;
 }
 
-.hero-actions {
+.page-heading {
+  align-items: flex-start;
   display: flex;
-  flex-wrap: wrap;
+  gap: 16px;
-  gap: 12px;
+  justify-content: space-between;
+  margin-bottom: 18px;
 }
 
+.section-kicker,
 .eyebrow {
-  color: #71d4c7;
+  color: var(--muted-foreground);
-  font-size: 13px;
+  font-size: 12px;
-  font-weight: 700;
+  font-weight: 650;
   letter-spacing: 0;
+  margin: 0 0 6px;
   text-transform: uppercase;
 }
 
-.metric-box {
+.hero-band {
-  background: #f8fafc;
+  background: var(--card);
-  border: 1px solid #e3e9f2;
+  border: 1px solid var(--border);
-  border-radius: 8px;
+  border-radius: var(--radius);
+  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
+  color: var(--foreground);
+  padding: 30px;
+}
+
+.hero-shell {
+  align-items: flex-end;
+  display: flex;
+  gap: 28px;
+  justify-content: space-between;
+}
+
+.hero-copy {
+  max-width: 700px;
+}
+
+.hero-copy h1 {
+  color: var(--foreground);
+  font-size: 34px;
+  font-weight: 700;
+  letter-spacing: 0;
+  line-height: 1.15;
+  margin: 0 0 12px;
+}
+
+.hero-copy p:not(.eyebrow) {
+  color: var(--muted-foreground);
+  font-size: 15px;
+  line-height: 1.75;
+  margin: 0;
+}
+
+.hero-metrics {
+  display: grid;
+  gap: 10px;
+  grid-template-columns: repeat(3, minmax(84px, 1fr));
+  min-width: 320px;
+}
+
+.hero-metric {
+  background: var(--muted);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  padding: 12px;
+}
+
+.hero-metric strong {
+  display: block;
+  font-size: 18px;
+  line-height: 1.2;
+}
+
+.hero-metric span {
+  color: var(--muted-foreground);
+  display: block;
+  font-size: 12px;
+  margin-top: 4px;
+}
+
+.btn {
+  border-radius: 6px;
+  font-size: 14px;
+  font-weight: 500;
+}
+
+.btn-primary {
+  background: var(--primary);
+  border-color: var(--primary);
+  color: var(--primary-foreground);
+}
+
+.btn-primary:hover,
+.btn-primary:focus {
+  background: #1e293b;
+  border-color: #1e293b;
+}
+
+.btn-outline-primary,
+.btn-outline-secondary {
+  background: var(--card);
+  border-color: var(--border);
+  color: var(--foreground);
+}
+
+.btn-outline-primary:hover,
+.btn-outline-secondary:hover {
+  background: var(--secondary);
+  border-color: var(--border);
+  color: var(--foreground);
+}
+
+.form-label {
+  color: var(--foreground);
+  font-size: 13px;
+  font-weight: 600;
+}
+
+.form-control,
+.form-select {
+  border-color: var(--input);
+  border-radius: 6px;
+  color: var(--foreground);
+  font-size: 14px;
+  min-height: 40px;
+}
+
+.form-control:focus,
+.form-select:focus {
+  border-color: var(--foreground);
+  box-shadow: 0 0 0 3px var(--ring);
+}
+
+.form-text {
+  color: var(--muted-foreground) !important;
+}
+
+.badge {
+  border-radius: 999px;
+  font-size: 12px;
+  font-weight: 600;
+  letter-spacing: 0;
+  padding: 5px 9px;
+}
+
+.bg-success,
+.text-bg-success {
+  background-color: #dcfce7 !important;
+  color: #166534 !important;
+}
+
+.bg-danger,
+.text-bg-danger {
+  background-color: #fee2e2 !important;
+  color: #991b1b !important;
+}
+
+.bg-warning,
+.text-bg-warning {
+  background-color: #fef3c7 !important;
+  color: #92400e !important;
+}
+
+.bg-secondary,
+.text-bg-secondary {
+  background-color: var(--secondary) !important;
+  color: var(--secondary-foreground) !important;
+}
+
+.text-bg-light {
+  background: var(--secondary) !important;
+  color: var(--foreground) !important;
+}
+
+.alert {
+  border-radius: var(--radius);
+  font-size: 14px;
+  margin-bottom: 16px;
+}
+
+.alert-info {
+  background: #eff6ff;
+  border-color: #bfdbfe;
+  color: #1e3a8a;
+}
+
+.alert-warning {
+  background: #fffbeb;
+  border-color: #fde68a;
+  color: #92400e;
+}
+
+.alert-danger {
+  background: #fef2f2;
+  border-color: #fecaca;
+  color: #991b1b;
+}
+
+.alert-secondary {
+  background: var(--secondary);
+  border-color: var(--border);
+  color: var(--foreground);
+}
+
+.metric-box,
+.stat-card {
+  background: var(--card);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
   height: 100%;
-  padding: 14px;
+  padding: 16px;
 }
 
-.status-panel {
+.metric-box strong,
-  background: #fff;
+.stat-card strong {
-  border: 1px solid #dfe5ef;
+  color: var(--foreground);
-  border-radius: 8px;
+  display: block;
-  padding: 32px;
+  font-size: 18px;
+  font-weight: 650;
+  line-height: 1.35;
+  margin: 4px 0;
 }
 
-.status-panel-danger {
+.app-table {
-  border-color: #f1b8b8;
+  color: var(--foreground);
+  min-width: 760px;
+}
+
+.app-table thead th {
+  background: var(--muted);
+  border-bottom: 1px solid var(--border);
+  color: var(--muted-foreground);
+  font-size: 12px;
+  font-weight: 650;
+  height: 42px;
+  letter-spacing: 0;
+  text-transform: none;
+  white-space: nowrap;
+}
+
+.app-table td {
+  border-color: var(--border);
+  padding-bottom: 14px;
+  padding-top: 14px;
+  vertical-align: middle;
+}
+
+.app-table tbody tr:hover {
+  background: var(--accent);
+}
+
+.task-number {
+  align-items: center;
+  background: var(--secondary);
+  border: 1px solid var(--border);
+  border-radius: 999px;
+  color: var(--foreground);
+  display: inline-flex;
+  font-weight: 650;
+  height: 30px;
+  justify-content: center;
+  min-width: 30px;
+  padding: 0 9px;
 }
 
 .task-progress {
-  height: 10px;
+  background: var(--secondary);
+  border-radius: 999px;
+  height: 8px;
+}
+
+.progress-bar {
+  background-color: var(--primary);
 }
 
 .report-progress {
-  height: 10px;
+  background: var(--secondary);
+  height: 8px;
+}
+
+.task-overview {
+  border-top: 0;
+}
+
+.progress-summary {
+  align-items: center;
+  display: flex;
+  flex-wrap: wrap;
+  gap: 10px;
+}
+
+.hotspot-item {
+  border-color: var(--border);
+  margin-bottom: 10px;
+}
+
+.accordion-button {
+  background: var(--card);
+  color: var(--foreground);
+  font-size: 15px;
+  font-weight: 600;
+  gap: 10px;
+  padding: 16px 18px;
+}
+
+.accordion-button:not(.collapsed) {
+  background: var(--muted);
+  box-shadow: none;
+  color: var(--foreground);
+}
+
+.accordion-button:focus {
+  border-color: var(--border);
+  box-shadow: 0 0 0 3px var(--ring);
+}
+
+.content-item-row {
+  align-items: center;
+  display: flex;
+  gap: 14px;
+  justify-content: space-between;
+}
+
+.content-item-title {
+  color: var(--foreground);
+  display: block;
+  font-weight: 600;
+  line-height: 1.45;
+  overflow-wrap: anywhere;
+}
+
+.content-item-meta {
+  color: var(--muted-foreground);
+  display: block;
+  font-size: 12px;
+  margin-top: 3px;
+  overflow-wrap: anywhere;
+}
+
+.report-summary {
+  background: var(--muted);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  padding: 16px;
+}
+
+.comment-card {
+  background: var(--card);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  padding: 12px;
+}
+
+.empty-state,
+.status-panel {
+  background: var(--card);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  padding: 32px;
+  text-align: center;
+}
+
+.status-panel-danger {
+  border-color: #fecaca;
+}
+
+@media (max-width: 992px) {
+  .hero-shell {
+    align-items: flex-start;
+    flex-direction: column;
+  }
+
+  .hero-metrics {
+    min-width: 0;
+    width: 100%;
+  }
 }
 
 @media (max-width: 768px) {
+  main.container {
+    padding-left: 14px;
+    padding-right: 14px;
+  }
+
   .hero-band {
-    align-items: flex-start;
+    padding: 22px;
-    flex-direction: column;
-    min-height: 360px;
-    padding: 28px;
   }
 
   .hero-copy h1 {
-    font-size: 36px;
+    font-size: 28px;
+  }
+
+  .hero-metrics {
+    grid-template-columns: 1fr;
+  }
+
+  .section-heading,
+  .page-heading,
+  .content-item-row {
+    align-items: flex-start;
+    flex-direction: column;
+  }
+
+  .card-body {
+    padding: 16px;
+  }
+
+  .content-item-row .btn {
+    width: 100%;
+  }
+
+  .accordion-button {
+    align-items: flex-start;
   }
 }

app/templates/base.html

@@ -5,14 +5,14 @@
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <title>{% block title %}热榜评论分析工具{% endblock %}</title>
   <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
-  <link href="/static/app.css" rel="stylesheet">
+  <link href="/static/app.css?v=shadcn-ui-refresh" rel="stylesheet">
   <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
   <script src="/static/app.js" defer></script>
 </head>
 <body>
-  <nav class="navbar navbar-expand-lg bg-body-tertiary border-bottom">
+  <nav class="navbar navbar-expand-lg app-navbar">
     <div class="container">
-      <a class="navbar-brand" href="/">热榜评论分析工具</a>
+      <a class="navbar-brand fw-semibold" href="/">热榜评论雷达</a>
       <div class="navbar-nav">
         <a class="nav-link" href="/">任务列表</a>
       </div>

app/templates/hotspots/report.html

@@ -8,15 +8,19 @@
 </ol></nav>
 {% endblock %}
 {% block content %}
-<div class="d-flex justify-content-between align-items-center mb-3">
+<div class="page-heading">
-  <h1 class="h3 mb-0">{{ hotspot.title }} 汇总报告</h1>
+  <div>
+    <p class="section-kicker">热点报告</p>
+    <h1>{{ hotspot.title }} 汇总报告</h1>
+  </div>
+  <span class="badge text-bg-light border">热点 #{{ hotspot.rank }}</span>
 </div>
 {% if report %}
   {% include "partials/report_panel.html" %}
 {% else %}
-  <div class="text-center text-muted py-5">
+  <div class="empty-state text-muted py-5">
     <div class="spinner-border text-warning mb-3" role="status"></div>
-    <p>报告生成中，请稍候...</p>
+    <p class="mb-0">报告生成中，请稍候...</p>
   </div>
 {% endif %}
 {% endblock %}

app/templates/index.html

@@ -3,19 +3,37 @@
 {% block title %}热榜评论雷达 - 热榜评论分析工具{% endblock %}
 {% block content %}
 <section class="hero-band mb-4">
+  <div class="hero-shell">
     <div class="hero-copy">
       <p class="eyebrow">Hot Comment Radar</p>
       <h1>热榜评论雷达</h1>
       <p>从小红书和抖音热点出发，抓取真实评论，生成 AI 情绪、标签和可导出的分析报告。</p>
     </div>
-  <div class="hero-actions">
+    <div class="hero-metrics" aria-label="默认任务规模">
-    <a class="btn btn-light" href="#create-task">创建新任务</a>
+      <div class="hero-metric">
-    <a class="btn btn-outline-light" href="#task-history">查看 Demo 数据</a>
+        <strong>5</strong>
+        <span>默认热点</span>
+      </div>
+      <div class="hero-metric">
+        <strong>25</strong>
+        <span>默认内容</span>
+      </div>
+      <div class="hero-metric">
+        <strong>1,250</strong>
+        <span>评论上限</span>
+      </div>
+    </div>
   </div>
 </section>
 
-<section class="card mb-4" id="create-task">
+<section class="tool-card mb-4" id="create-task">
-  <div class="card-header">创建抓取任务</div>
+  <div class="section-heading">
+    <div>
+      <p class="section-kicker">采集配置</p>
+      <h2>创建抓取任务</h2>
+    </div>
+    <span class="badge text-bg-light border">默认规模 5 × 5 × 50</span>
+  </div>
   <div class="card-body">
     <div id="form-error" class="alert alert-danger d-none" role="alert"></div>
     <form id="task-form" onsubmit="submitTask(event)">
@@ -50,13 +68,16 @@
   </div>
 </section>
 
-<section class="card" id="task-history">
+<section class="tool-card" id="task-history">
-  <div class="card-header d-flex justify-content-between align-items-center">
+  <div class="section-heading">
-    <span>最近任务与 Demo 数据</span>
+    <div>
-    <button class="btn btn-outline-secondary btn-sm" onclick="window.location.href='/'">手动刷新</button>
+      <p class="section-kicker">任务历史</p>
+      <h2>最近任务</h2>
+    </div>
+    {% if has_running_tasks %}<span class="badge text-bg-warning">自动更新中</span>{% endif %}
   </div>
   <div class="table-responsive">
-    <table class="table table-hover align-middle mb-0">
+    <table class="table app-table align-middle mb-0">
       <thead>
         <tr>
           <th>任务 ID</th>

app/templates/items/detail.html

@@ -9,21 +9,25 @@
 </ol></nav>
 {% endblock %}
 {% block content %}
-<div class="d-flex justify-content-between align-items-center mb-3">
+<div class="page-heading">
-  <h1 class="h3 mb-0">{{ item.title or item.source_item_id }}</h1>
+  <div>
+    <p class="section-kicker">内容详情</p>
+    <h1>{{ item.title or item.source_item_id }}</h1>
+  </div>
+  <span class="badge text-bg-light border">{{ item.status }}</span>
 </div>
 {% if report %}
   {% include "partials/report_panel.html" %}
 {% else %}
-  <div class="text-center text-muted py-5">
+  <div class="empty-state text-muted py-5">
     <div class="spinner-border text-warning mb-3" role="status"></div>
-    <p>报告生成中，请稍候...</p>
+    <p class="mb-0">报告生成中，请稍候...</p>
   </div>
 {% endif %}
 <section class="card"><div class="card-header">评论明细</div><div class="table-responsive">
-  <table class="table mb-0"><thead><tr><th>评论内容</th><th>情绪</th><th>标签</th><th>点赞</th></tr></thead><tbody>
+  <table class="table app-table mb-0"><thead><tr><th>评论内容</th><th>情绪</th><th>标签</th><th>点赞</th></tr></thead><tbody>
   {% for comment in comments %}
-    <tr><td>{{ comment.content }}</td><td>{{ comment.sentiment }}</td><td>{% for label in comment.labels | from_json %}<span class="badge bg-secondary me-1">{{ label }}</span>{% else %}-{% endfor %}</td><td>{{ comment.like_count or 0 }}</td></tr>
+    <tr><td>{{ comment.content }}</td><td><span class="badge text-bg-light border">{{ comment.sentiment }}</span></td><td>{% for label in comment.labels | from_json %}<span class="badge text-bg-light border me-1">{{ label }}</span>{% else %}<span class="text-muted">-</span>{% endfor %}</td><td>{{ comment.like_count or 0 }}</td></tr>
   {% else %}
     <tr><td colspan="4" class="text-center text-muted">暂无评论数据（该内容无评论或评论抓取为空）</td></tr>
   {% endfor %}

app/templates/partials/report_panel.html

@@ -13,28 +13,28 @@
 
     <div class="row g-3 mb-4">
       <div class="col-md-3">
-        <div class="border rounded p-3 h-100">
+        <div class="stat-card">
           <div class="text-muted small">评论样本</div>
           <div class="h4 mb-0">{{ sample_count }}</div>
         </div>
       </div>
       {% if item_count is not none %}
         <div class="col-md-3">
-          <div class="border rounded p-3 h-100">
+          <div class="stat-card">
             <div class="text-muted small">关联内容</div>
             <div class="h4 mb-0">{{ item_count }}</div>
           </div>
         </div>
       {% endif %}
       <div class="col-md-3">
-        <div class="border rounded p-3 h-100">
+        <div class="stat-card">
           <div class="text-muted small">AI 成功率</div>
           <div class="h4 mb-0">{{ rate_percent(task.analysis_success_rate) }}%</div>
         </div>
       </div>
     </div>
 
-    <div class="p-3 bg-info-subtle border border-info-subtle rounded mb-4">
+    <div class="report-summary mb-4">
       <div class="fw-semibold mb-2">AI 总结</div>
       <p class="mb-0">{{ report.summary or "总结生成失败，请查看上方统计数据。" }}</p>
     </div>
@@ -77,7 +77,7 @@
         <div class="col-md-4">
           <h3 class="h6">{{ sentiment_label(key) }}</h3>
           {% for comment in typical.get(key, []) %}
-            <div class="border rounded p-2 mb-2">
+            <div class="comment-card mb-2">
               <p class="mb-1">{{ comment.get("content") }}</p>
               <small class="text-muted">点赞 {{ comment.get("like_count", 0) }}</small>
             </div>

app/templates/partials/task_rows.html

@@ -4,14 +4,11 @@
   {% set ai_percent = rate_percent(task.analysis_success_rate) %}
   <tr>
     <td>
-      <strong>{{ task.display_id or loop.index }}</strong>
+      <span class="task-number">{{ task.display_id or loop.index }}</span>
-      {% if task.is_demo %}
-        <br><span class="badge text-bg-info">Demo 数据</span>
-      {% endif %}
     </td>
-    <td>{{ task.platform | platform_label }}</td>
+    <td><span class="badge text-bg-light border">{{ task.platform | platform_label }}</span></td>
-    <td>{{ task.created_at_label }}</td>
+    <td><span class="text-muted small">{{ task.created_at_label }}</span></td>
-    <td><small class="text-muted">{{ task.scale_label }}</small></td>
+    <td><span class="text-muted small">{{ task.scale_label }}</span></td>
     <td class="task-progress-cell">
       <div class="d-flex justify-content-between align-items-center gap-2">
         <span class="small">已处理 {{ task.processed_items_count }} / 共 {{ task.total_items_count }} 条内容</span>
@@ -20,9 +17,12 @@
       <div class="progress task-progress mt-1" role="progressbar" aria-label="任务进度" aria-valuenow="{{ percent }}" aria-valuemin="0" aria-valuemax="100">
         <div class="progress-bar" style="width: {{ percent }}%"></div>
       </div>
-      <div class="small text-muted mt-1">成功 {{ task.successful_items_count }} / 失败 {{ task.failed_items_count }}</div>
+      <div class="progress-summary mt-2">
+        <span class="small text-muted">成功 {{ task.successful_items_count }} / 失败 {{ task.failed_items_count }}</span>
+        <span class="small text-muted">评论 {{ task.comments_count or 0 }}</span>
+        <span class="small text-muted">报告 {{ task.reports_count or 0 }}</span>
+      </div>
       <div class="small text-muted mt-1">阶段：{{ task.current_stage_label or "等待启动" }}</div>
-      <div class="small text-muted mt-1">评论 {{ task.comments_count or 0 }} / 报告 {{ task.reports_count or 0 }}</div>
       <div class="small {% if task.analysis_status == 'insufficient' %}text-warning{% else %}text-muted{% endif %}">
         AI 成功率 {{ ai_percent }}%
         {% if task.analysis_status == "insufficient" %}
@@ -36,7 +36,7 @@
         <br><small class="text-danger">{{ task.error_summary }}</small>
       {% endif %}
     </td>
-    <td><a class="btn btn-sm btn-outline-primary" href="/tasks/{{ task.id }}">查看</a></td>
+    <td><a class="btn btn-sm btn-outline-secondary" href="/tasks/{{ task.id }}">查看</a></td>
   </tr>
 {% else %}
   <tr>

app/templates/tasks/detail.html

@@ -7,21 +7,27 @@
 </ol></nav>
 {% endblock %}
 {% block content %}
-<div class="d-flex justify-content-between align-items-center mb-3">
+<div class="page-heading mb-3">
-  <h1 class="h3 mb-0">任务 {{ task.display_id }}</h1>
+  <div>
-  <button class="btn btn-outline-secondary btn-sm" onclick="window.location.reload()">手动刷新</button>
+    <p class="section-kicker">任务详情</p>
-</div>
+    <h1>任务 {{ task.display_id }}</h1>
-<section class="card mb-4" {% if task.status == "running" %}data-task-id="{{ task.id }}" data-auto-poll="true"{% endif %}><div class="card-body">
+  </div>
   {% set label, cls = status_badge_config(task.status) %}
+  <span class="badge {{ cls }}">{{ label }}</span>
+</div>
+<section class="tool-card task-overview mb-4" {% if task.status == "running" %}data-task-id="{{ task.id }}" data-auto-poll="true"{% endif %}>
+<div class="card-body">
   {% set percent = progress_percent(task.processed_items_count, task.total_items_count) %}
   {% set ai_percent = rate_percent(task.analysis_success_rate) %}
   {% set target_comments = task.hotspot_limit * task.item_limit_per_hotspot * task.comment_limit_per_item %}
-  <div class="d-flex flex-wrap justify-content-between gap-3 mb-3">
+  <div class="d-flex flex-wrap justify-content-between align-items-start gap-3 mb-4">
-    <p class="mb-0">平台：{{ task.platform | platform_label }} <span class="badge {{ cls }}">{{ label }}</span>{% if task.is_demo %}<span class="badge text-bg-info ms-1">Demo 数据</span>{% endif %}</p>
+    <div>
-    <p class="mb-0 text-muted">阶段：{{ task.current_stage_label or "等待启动" }}</p>
+      <span class="badge text-bg-light border">{{ task.platform | platform_label }}</span>
+      <span class="badge text-bg-light border ms-1">{{ task.current_stage_label or "等待启动" }}</span>
     </div>
-  <div class="small text-muted mb-3">创建时间 {{ task.created_at_label }} · 完整 ID {{ task.id }}</div>
+    <p class="mb-0 text-muted small">创建时间 {{ task.created_at_label }} · 阶段 {{ task.current_stage_label or "等待启动" }}</p>
-  <div class="mb-3">
+  </div>
+  <div class="mb-4">
     <div class="d-flex justify-content-between align-items-center gap-2">
       <span>已处理 {{ task.processed_items_count }} / 共 {{ task.total_items_count }} 条内容</span>
       <span class="text-muted">{{ percent }}%</span>
@@ -29,7 +35,10 @@
     <div class="progress task-progress mt-2" role="progressbar" aria-label="任务进度" aria-valuenow="{{ percent }}" aria-valuemin="0" aria-valuemax="100">
       <div class="progress-bar" style="width: {{ percent }}%"></div>
     </div>
-    <div class="small text-muted mt-2">成功 {{ task.successful_items_count }} / 失败 {{ task.failed_items_count }}</div>
+    <div class="progress-summary mt-2">
+      <span class="small text-muted">成功 {{ task.successful_items_count }} / 失败 {{ task.failed_items_count }}</span>
+      <span class="small text-muted">AI 成功率 {{ ai_percent }}%</span>
+    </div>
   </div>
   <div class="row g-3 mb-3">
     <div class="col-md-4">
@@ -67,33 +76,40 @@
   {% if task.status == "success" and (task.comments_count or 0) < target_comments %}
     <div class="alert alert-info">少于理论上限通常是内容本身评论不足或平台返回不足，不直接代表任务失败。若失败内容数大于 0，请结合失败原因判断。</div>
   {% endif %}
-  <div class="mb-2">
-    <span class="{% if task.analysis_status == 'insufficient' %}text-warning{% else %}text-muted{% endif %}">AI 成功率 {{ ai_percent }}%</span>
   {% if task.analysis_status == "insufficient" %}
-      <span class="badge text-bg-warning ms-1">AI 样本不足</span>
+    <div class="alert alert-warning">AI 成功率 {{ ai_percent }}%，当前样本可能不足，报告结论请结合评论明细判断。</div>
   {% endif %}
-  </div>
   {% if task.error_summary %}<div class="alert alert-danger">{{ task.error_summary }}</div>{% endif %}
-</div></section>
+</div>
+</section>
 {% if task.status == "running" and not hotspots %}
-<div class="text-center text-muted py-5"><div class="spinner-border text-warning mb-3"></div><p>正在抓取热点数据，请稍候...</p></div>
+<div class="empty-state text-muted py-5"><div class="spinner-border text-warning mb-3"></div><p class="mb-0">正在抓取热点数据，请稍候...</p></div>
 {% endif %}
 <div class="accordion" id="hotspot-list">
 {% for hotspot in hotspots %}
-  <div class="accordion-item">
+  <div class="accordion-item hotspot-item">
     <h2 class="accordion-header">
       <button class="accordion-button {% if not loop.first %}collapsed{% endif %}" type="button" data-bs-toggle="collapse" data-bs-target="#hotspot-{{ hotspot.id }}">
-        热点 {{ hotspot.rank }}：{{ hotspot.title }}
+        <span class="badge text-bg-light border">#{{ hotspot.rank }}</span>
+        <span>热点 {{ hotspot.rank }}：{{ hotspot.title }}</span>
       </button>
     </h2>
     <div id="hotspot-{{ hotspot.id }}" class="accordion-collapse collapse {% if loop.first %}show{% endif %}" data-bs-parent="#hotspot-list">
       <div class="accordion-body">
-        <a class="btn btn-sm btn-outline-primary mb-2" href="/hotspots/{{ hotspot.id }}/report">查看热点级汇总报告</a>
+        <div class="d-flex justify-content-between align-items-center gap-3 mb-3">
-        <ul class="list-group">
+          <span class="text-muted small">内容条目 {{ hotspot.content_items | length }}</span>
+          <a class="btn btn-sm btn-outline-primary" href="/hotspots/{{ hotspot.id }}/report">查看汇总报告</a>
+        </div>
+        <ul class="list-group list-group-flush">
         {% for item in hotspot.content_items %}
-          <li class="list-group-item d-flex justify-content-between">
+          <li class="list-group-item px-0">
-            <span>{{ item.title or item.summary or item.source_item_id }} <small class="text-muted">{{ item.status }}</small></span>
+            <div class="content-item-row">
+              <span>
+                <span class="content-item-title">{{ item.title or item.summary or item.source_item_id }}</span>
+                <span class="content-item-meta">状态 {{ item.status }} · ID {{ item.source_item_id }}</span>
+              </span>
               <a class="btn btn-sm btn-outline-secondary" href="/items/{{ item.id }}">查看详情</a>
+            </div>
           </li>
         {% endfor %}
         </ul>

tests/integration/test_routes.py

@@ -18,7 +18,10 @@ def test_index_page_renders_task_form_empty_state_and_default_scale():
     assert 'name="item_limit_per_hotspot"' in response.text
     assert 'name="comment_limit_per_item"' in response.text
     assert "1250" in response.text
-    assert 'onclick="window.location.href=\'/\'"' in response.text
+    assert "手动刷新" not in response.text
+    assert 'onclick="window.location.href=\'/\'"' not in response.text
+    assert 'href="#create-task"' not in response.text
+    assert 'href="#task-history"' not in response.text
     assert "还没有任何任务" in response.text
 
 
@@ -104,10 +107,13 @@ def test_index_page_uses_short_task_numbers_compact_fields_and_friendly_error_co
     assert "#" not in visible_text
     assert first_id not in visible_text
     assert second_id not in visible_text
-    assert "2026-07-03 10:30" in visible_text
+    assert "2026-07-03 18:30" in visible_text
-    assert "2026-07-03 10:35" in visible_text
+    assert "2026-07-03 18:35" in visible_text
-    assert "小红书 · 5热点 × 5内容 × 50评论" in visible_text
+    assert "Demo 数据" not in visible_text
-    assert "抖音 · 1热点 × 1内容 × 10评论" in visible_text
+    assert "5热点 × 5内容 × 50评论" in visible_text
+    assert "1热点 × 1内容 × 10评论" in visible_text
+    assert "小红书 · 5热点" not in visible_text
+    assert "抖音 · 1热点" not in visible_text
     assert "系统重启，任务被中断" in visible_text
     assert "system / unexpected_restart" not in visible_text
     assert "unexpected_restart" not in visible_text
@@ -167,12 +173,13 @@ def test_running_task_detail_page_auto_polls_current_task():
     assert response.status_code == 200
     assert 'data-task-id="task-running"' in response.text
     assert "pollTaskDetailStatus" in response.text
-    assert 'onclick="window.location.reload()"' in response.text
+    assert "手动刷新" not in response.text
+    assert 'onclick="window.location.reload()"' not in response.text
     assert "已处理 1 / 共 2 条内容" in response.text
     assert "AI 成功率 100%" in response.text
 
 
-def test_task_detail_uses_short_number_title_and_keeps_full_uuid_for_diagnostics():
+def test_task_detail_uses_short_number_title_and_hides_full_uuid():
     task_id = "33333333-3333-4333-8333-333333333333"
     with make_test_client() as (client, engine):
         from sqlalchemy.orm import Session
@@ -197,11 +204,42 @@ def test_task_detail_uses_short_number_title_and_keeps_full_uuid_for_diagnostics
     visible_text = BeautifulSoup(response.text, "html.parser").get_text(" ")
     assert "<title>任务 1 - 热榜评论分析工具</title>" in response.text
     assert "任务 1" in visible_text
-    assert "完整 ID" in visible_text
+    assert "完整 ID" not in visible_text
-    assert task_id in visible_text
+    assert task_id not in visible_text
     assert "任务 #33333333-3333-4333-8333-333333333333" not in visible_text
     assert "#" not in visible_text
-    assert "创建时间 2026-07-03 10:30" in visible_text
+    assert "创建时间 2026-07-03 18:30" in visible_text
+    assert "Demo 数据" not in visible_text
+
+
+def test_demo_task_flag_is_kept_but_demo_copy_is_hidden_from_pages():
+    with make_test_client() as (client, engine):
+        from sqlalchemy.orm import Session
+
+        with Session(engine) as session:
+            session.add(
+                Task(
+                    id="demo-task-hidden-copy",
+                    platform="xiaohongshu",
+                    status="success",
+                    created_at=datetime(2026, 7, 3, 10, 30, tzinfo=UTC),
+                    hotspot_limit=1,
+                    item_limit_per_hotspot=1,
+                    comment_limit_per_item=10,
+                )
+            )
+            session.commit()
+
+        index_response = client.get("/")
+        detail_response = client.get("/tasks/demo-task-hidden-copy")
+        api_response = client.get("/api/tasks/demo-task-hidden-copy")
+
+    assert index_response.status_code == 200
+    assert detail_response.status_code == 200
+    assert api_response.status_code == 200
+    assert api_response.json()["is_demo"] is True
+    assert "Demo 数据" not in BeautifulSoup(index_response.text, "html.parser").get_text(" ")
+    assert "Demo 数据" not in BeautifulSoup(detail_response.text, "html.parser").get_text(" ")
 
 
 def test_running_task_detail_page_keeps_polling_after_hotspots_exist():
@@ -296,7 +334,7 @@ def test_running_task_detail_page_shows_stage_runtime_and_stale_progress_warning
         response = client.get("/tasks/task-stale")
 
     assert response.status_code == 200
-    assert "阶段：AI 分析中" in response.text
+    assert "阶段 AI 分析中" in response.text
     assert "运行时长" in response.text
     assert "2小时5分钟" in response.text
     assert "最近进度" in response.text
@@ -419,7 +457,8 @@ def test_result_pages_render_seeded_data():
     assert task_response.status_code == 200
     assert "热点标题" in task_response.text
     assert "热点 1：热点标题" in BeautifulSoup(task_response.text, "html.parser").get_text(" ")
-    assert 'onclick="window.location.reload()"' in task_response.text
+    assert 'onclick="window.location.reload()"' not in task_response.text
+    assert "手动刷新" not in task_response.text
     assert hotspot_response.status_code == 200
     assert "热点总结" in hotspot_response.text
     assert "downloadExport(" not in hotspot_response.text

tests/unit/test_comment_pagination.py

@@ -53,6 +53,61 @@ def test_tikhub_client_raises_structured_error_after_retries(monkeypatch):
     assert sleeps == [1, 2, 4]
 
 
+def test_tikhub_client_retries_transient_api_error(monkeypatch):
+    sleeps = []
+    monkeypatch.setattr("app.platforms.base.time.sleep", sleeps.append)
+    transport = SequenceTransport(
+        [
+            httpx.Response(400, json={"message_zh": "临时请求失败"}),
+            httpx.Response(200, json={"ok": True}),
+        ]
+    )
+    http_client = httpx.Client(transport=httpx.MockTransport(transport))
+    client = TikHubClient(base_url="https://api.test", api_key="secret-token", http_client=http_client)
+
+    result = client.get("/demo")
+
+    assert result == {"ok": True}
+    assert sleeps == [1]
+    assert len(transport.requests) == 2
+
+
+def test_tikhub_client_includes_response_summary_after_api_error_retries(monkeypatch):
+    sleeps = []
+    monkeypatch.setattr("app.platforms.base.time.sleep", sleeps.append)
+    transport = SequenceTransport(
+        [httpx.Response(400, json={"message_zh": "笔记评论暂不可用"}) for _ in range(4)]
+    )
+    http_client = httpx.Client(transport=httpx.MockTransport(transport))
+    client = TikHubClient(base_url="https://api.test", api_key="secret-token", http_client=http_client)
+
+    with pytest.raises(PlatformAPIError) as exc_info:
+        client.get("/demo")
+
+    assert exc_info.value.error_type == "api_error"
+    assert exc_info.value.status_code == 400
+    assert "External API returned HTTP 400" in str(exc_info.value)
+    assert "笔记评论暂不可用" in str(exc_info.value)
+    assert "secret-token" not in str(exc_info.value)
+    assert sleeps == [1, 2, 4]
+
+
+def test_tikhub_client_includes_text_response_summary_after_api_error_retries(monkeypatch):
+    sleeps = []
+    monkeypatch.setattr("app.platforms.base.time.sleep", sleeps.append)
+    transport = SequenceTransport([httpx.Response(502, text="upstream temporary failure") for _ in range(4)])
+    http_client = httpx.Client(transport=httpx.MockTransport(transport))
+    client = TikHubClient(base_url="https://api.test", api_key="secret-token", http_client=http_client)
+
+    with pytest.raises(PlatformAPIError) as exc_info:
+        client.get("/demo")
+
+    assert exc_info.value.error_type == "api_error"
+    assert exc_info.value.status_code == 502
+    assert str(exc_info.value) == "External API returned HTTP 502: upstream temporary failure"
+    assert sleeps == [1, 2, 4]
+
+
 def test_tikhub_client_reports_401_as_auth_error_without_leaking_token():
     transport = SequenceTransport([httpx.Response(401, json={"message": "Unauthorized"})])
     http_client = httpx.Client(transport=httpx.MockTransport(transport))

tests/unit/test_db_stability.py

@@ -1,4 +1,5 @@
 import pytest
+from sqlalchemy.pool import NullPool
 
 from app.db import check_database_integrity, checkpoint_sqlite_wal, create_sqlite_engine, ensure_sqlite_schema_compat
 
@@ -11,6 +12,14 @@ def test_check_database_integrity_returns_ok_for_valid_sqlite_database():
         engine.dispose()
 
 
+def test_file_sqlite_engine_does_not_reuse_connections_after_operational_errors(tmp_path):
+    engine = create_sqlite_engine(f"sqlite:///{tmp_path / 'app.db'}")
+    try:
+        assert isinstance(engine.pool, NullPool)
+    finally:
+        engine.dispose()
+
+
 def test_check_database_integrity_raises_when_sqlite_reports_problem(monkeypatch):
     class FakeCursor:
         def execute(self, _sql):