diff --git a/routes/admin_observability_routes.py b/routes/admin_observability_routes.py
index 4fa609f..c44e733 100644
--- a/routes/admin_observability_routes.py
+++ b/routes/admin_observability_routes.py
@@ -1575,6 +1575,17 @@ def budget_dashboard():
                 'cost': float(r[2] or 0),
             })
 
+        # Phase 55 S-3: 當月各 provider cost 分布（給圓餅圖用）
+        provider_cost_month = session.execute(
+            sa_text("""
+                SELECT provider, COALESCE(SUM(cost_usd), 0) AS cost
+                FROM ai_calls
+                WHERE called_at >= :ms AND cost_usd > 0
+                GROUP BY provider ORDER BY cost DESC
+            """),
+            {'ms': month_start},
+        ).fetchall()
+
         # Phase 47 K-3: top 5 cost-burning caller (當月)
         top_cost_callers = session.execute(
             sa_text("""
@@ -1643,6 +1654,10 @@ def budget_dashboard():
                 }
                 for r in top_cost_callers
             ],
+            provider_cost_month=[
+                {'provider': r[0], 'cost': float(r[1] or 0)}
+                for r in provider_cost_month
+            ],
             price_rec_7d=[
                 {
                     'strategy': r[0], 'count': int(r[1] or 0),
@@ -1656,6 +1671,7 @@ def budget_dashboard():
         return render_template('admin/budget.html', active_page='obs_budget', rows=[],
                                 budget_strategies=[], cost_trend_30d=[],
                                 top_cost_callers=[], price_rec_7d=[],
+                                provider_cost_month=[],
                                 error=f'查詢失敗: {type(e).__name__}: {str(e)[:200]}')
     finally:
         session.close()
diff --git a/templates/admin/budget.html b/templates/admin/budget.html
index 0691a71..6262fb4 100644
--- a/templates/admin/budget.html
+++ b/templates/admin/budget.html
@@ -99,6 +99,44 @@
     </tbody>
   </table>
 
+  <!-- Phase 55 S-3: 當月各 provider 成本分布圓餅 -->
+  {% if provider_cost_month %}
+  <div class="card mb-3">
+    <div class="card-header"><strong><i class="fas fa-chart-pie me-2"></i>當月各供應商成本分布</strong>
+      <small class="text-muted">資料來源：ai_calls.cost_usd GROUP BY provider · 月初至今</small>
+    </div>
+    <div class="card-body">
+      <div class="row g-2 align-items-center">
+        <div class="col-md-5">
+          <canvas id="providerCostPieChart" height="180"></canvas>
+        </div>
+        <div class="col-md-7">
+          <table class="table table-sm mb-0" style="font-size: 0.9em;">
+            <thead class="table-light">
+              <tr><th>供應商</th><th class="text-end">成本</th><th class="text-end">佔比</th></tr>
+            </thead>
+            <tbody>
+              {% set total_pc = (provider_cost_month | sum(attribute='cost')) or 0.0001 %}
+              {% for p in provider_cost_month %}
+              <tr>
+                <td><code>{{ p.provider }}</code></td>
+                <td class="text-end">${{ "%.4f"|format(p.cost) }}</td>
+                <td class="text-end">{{ "%.1f"|format(p.cost / total_pc * 100) }}%</td>
+              </tr>
+              {% endfor %}
+              <tr style="border-top: 2px solid #dee2e6;">
+                <td><strong>總計</strong></td>
+                <td class="text-end"><strong>${{ "%.2f"|format(total_pc) }}</strong></td>
+                <td class="text-end"><strong>100%</strong></td>
+              </tr>
+            </tbody>
+          </table>
+        </div>
+      </div>
+    </div>
+  </div>
+  {% endif %}
+
   <!-- Phase 47 K-3: Top 5 cost-burning caller -->
   {% if top_cost_callers %}
   <div class="card mb-3">
@@ -173,6 +211,39 @@
 
 <script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.1/dist/chart.umd.min.js"></script>
 <script>
+// Phase 55 S-3: provider 月度成本圓餅
+(function() {
+  const data = {{ provider_cost_month | default([]) | tojson }};
+  const el = document.getElementById('providerCostPieChart');
+  if (!el || !data.length) return;
+  const colors = {
+    'gcp_ollama': '#28a745', 'ollama_secondary': '#5cb85c', 'ollama_111': '#a3d9a4',
+    'gemini': '#fd7e14', 'claude': '#6610f2', 'nim': '#0dcaf0',
+    'openrouter': '#6c757d', 'nim_via_elephant': '#20c997',
+  };
+  new Chart(el, {
+    type: 'doughnut',
+    data: {
+      labels: data.map(d => d.provider),
+      datasets: [{
+        data: data.map(d => d.cost),
+        backgroundColor: data.map((d, i) => colors[d.provider] || `hsl(${(i*47)%360}, 65%, 55%)`),
+        borderWidth: 1, borderColor: '#fff',
+      }]
+    },
+    options: {
+      responsive: true, maintainAspectRatio: false,
+      plugins: {
+        legend: { position: 'right', labels: { font: { size: 11 } } },
+        tooltip: { callbacks: { label: c => {
+          const total = data.reduce((a,b)=>a+b.cost, 0);
+          return `${c.label}: $${c.parsed.toFixed(4)} (${(c.parsed/total*100).toFixed(1)}%)`;
+        }}}
+      }
+    }
+  });
+})();
+
 // Phase 50 N-2: 30d cost trend stacked bar chart
 (function() {
   const raw = {{ cost_trend_30d | tojson }};
diff --git a/templates/admin/ppt_audit_history.html b/templates/admin/ppt_audit_history.html
index ec9ef66..a11b19b 100644
--- a/templates/admin/ppt_audit_history.html
+++ b/templates/admin/ppt_audit_history.html
@@ -130,48 +130,55 @@
     <code>python3 -c "from services.ppt_vision_service import ppt_vision_service; print(ppt_vision_service.check_ppt_file('reports/xxx.pptx'))"</code>
   </p>
 
-  <!-- Phase 47 K-6: 30d 統計 -->
+  <!-- Phase 47 K-6 + Phase 55 S-2: 30d 統計（含圓餅圖） -->
   {% if audit_30d_stats and audit_30d_stats.total > 0 %}
   <div class="card mb-3">
     <div class="card-header"><strong><i class="fas fa-chart-pie me-2"></i>過去 30 日 PPT 審核統計</strong>
       <small class="text-muted">資料來源：ppt_audit_results 全表聚合</small>
     </div>
     <div class="card-body">
-      <div class="row g-2">
-        <div class="col-md-2 col-sm-4">
-          <div class="border rounded p-2 text-center">
-            <small class="text-muted d-block">總筆數</small>
-            <strong style="font-size: 1.4em;">{{ audit_30d_stats.total }}</strong>
-          </div>
+      <div class="row g-2 align-items-center">
+        <div class="col-md-5">
+          <canvas id="pptAuditPieChart" height="200"></canvas>
         </div>
-        <div class="col-md-2 col-sm-4">
-          <div class="border rounded p-2 text-center">
-            <small class="text-muted d-block">通過</small>
-            <strong class="text-success" style="font-size: 1.4em;">{{ audit_30d_stats.passed }}</strong>
-          </div>
-        </div>
-        <div class="col-md-2 col-sm-4">
-          <div class="border rounded p-2 text-center">
-            <small class="text-muted d-block">失敗</small>
-            <strong class="{% if audit_30d_stats.failed > 0 %}text-warning{% endif %}" style="font-size: 1.4em;">{{ audit_30d_stats.failed }}</strong>
-          </div>
-        </div>
-        <div class="col-md-2 col-sm-4">
-          <div class="border rounded p-2 text-center">
-            <small class="text-muted d-block">錯誤</small>
-            <strong class="{% if audit_30d_stats.error > 0 %}text-danger{% endif %}" style="font-size: 1.4em;">{{ audit_30d_stats.error }}</strong>
-          </div>
-        </div>
-        <div class="col-md-2 col-sm-4">
-          <div class="border rounded p-2 text-center">
-            <small class="text-muted d-block">通過率</small>
-            <strong class="{% if audit_30d_stats.pass_rate >= 80 %}text-success{% elif audit_30d_stats.pass_rate >= 60 %}text-warning{% else %}text-danger{% endif %}" style="font-size: 1.4em;">{{ "%.0f"|format(audit_30d_stats.pass_rate) }}%</strong>
-          </div>
-        </div>
-        <div class="col-md-2 col-sm-4">
-          <div class="border rounded p-2 text-center">
-            <small class="text-muted d-block">總 issue 數</small>
-            <strong style="font-size: 1.4em;">{{ audit_30d_stats.total_issues }}</strong>
+        <div class="col-md-7">
+          <div class="row g-2">
+            <div class="col-6">
+              <div class="border rounded p-2 text-center">
+                <small class="text-muted d-block">總筆數</small>
+                <strong style="font-size: 1.4em;">{{ audit_30d_stats.total }}</strong>
+              </div>
+            </div>
+            <div class="col-6">
+              <div class="border rounded p-2 text-center">
+                <small class="text-muted d-block">通過率</small>
+                <strong class="{% if audit_30d_stats.pass_rate >= 80 %}text-success{% elif audit_30d_stats.pass_rate >= 60 %}text-warning{% else %}text-danger{% endif %}" style="font-size: 1.4em;">{{ "%.0f"|format(audit_30d_stats.pass_rate) }}%</strong>
+              </div>
+            </div>
+            <div class="col-6">
+              <div class="border rounded p-2 text-center">
+                <small class="text-muted d-block">通過</small>
+                <strong class="text-success" style="font-size: 1.4em;">{{ audit_30d_stats.passed }}</strong>
+              </div>
+            </div>
+            <div class="col-6">
+              <div class="border rounded p-2 text-center">
+                <small class="text-muted d-block">總 issue 數</small>
+                <strong style="font-size: 1.4em;">{{ audit_30d_stats.total_issues }}</strong>
+              </div>
+            </div>
+            <div class="col-6">
+              <div class="border rounded p-2 text-center">
+                <small class="text-muted d-block">失敗</small>
+                <strong class="{% if audit_30d_stats.failed > 0 %}text-warning{% endif %}" style="font-size: 1.4em;">{{ audit_30d_stats.failed }}</strong>
+              </div>
+            </div>
+            <div class="col-6">
+              <div class="border rounded p-2 text-center">
+                <small class="text-muted d-block">錯誤</small>
+                <strong class="{% if audit_30d_stats.error > 0 %}text-danger{% endif %}" style="font-size: 1.4em;">{{ audit_30d_stats.error }}</strong>
+              </div>
+            </div>
           </div>
         </div>
       </div>
@@ -234,7 +241,43 @@
   </small></p>
 </div>
 
+<script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.1/dist/chart.umd.min.js"></script>
 <script>
+// Phase 55 S-2: PPT audit doughnut
+(function() {
+  const stats = {{ audit_30d_stats | default({}) | tojson }};
+  const el = document.getElementById('pptAuditPieChart');
+  if (!el || !stats.total) return;
+  const data = [
+    { label: '通過', value: stats.passed || 0, color: '#198754' },
+    { label: '失敗', value: stats.failed || 0, color: '#ffc107' },
+    { label: '錯誤', value: stats.error || 0, color: '#dc3545' },
+    { label: '跳過', value: stats.skipped || 0, color: '#6c757d' },
+  ].filter(d => d.value > 0);
+  if (!data.length) return;
+  new Chart(el, {
+    type: 'doughnut',
+    data: {
+      labels: data.map(d => d.label),
+      datasets: [{
+        data: data.map(d => d.value),
+        backgroundColor: data.map(d => d.color),
+        borderWidth: 1, borderColor: '#fff',
+      }]
+    },
+    options: {
+      responsive: true, maintainAspectRatio: false,
+      plugins: {
+        legend: { position: 'right', labels: { font: { size: 12 } } },
+        tooltip: { callbacks: { label: c => {
+          const total = data.reduce((a,b)=>a+b.value, 0);
+          return `${c.label}: ${c.parsed} (${(c.parsed/total*100).toFixed(1)}%)`;
+        }}}
+      }
+    }
+  });
+})();
+
 async function triggerAiderHeal(pptxFilename, errorMsg) {
   if (!confirm(`觸發 AiderHeal 自動修復？\n\n檔案：${pptxFilename}\n錯誤：${(errorMsg || '').substring(0, 200)}\n\nAiderHeal 會嘗試修 services/ppt_generator.py 並 git push 到 main 觸發 CD。`)) return;
   try {
diff --git a/templates/admin/promotion_review.html b/templates/admin/promotion_review.html
index fe60884..113ec96 100644
--- a/templates/admin/promotion_review.html
+++ b/templates/admin/promotion_review.html
@@ -76,32 +76,44 @@
     </div>
   {% endif %}
 
-  <!-- Phase 47 K-4: 蒸餾池 30d 分布 -->
+  <!-- Phase 47 K-4 + Phase 55 S-1: 蒸餾池 30d 圓餅 + 表格 -->
   {% if episode_distribution_30d %}
   <div class="card mb-3">
     <div class="card-header"><strong><i class="fas fa-flask me-2"></i>蒸餾池 30 日狀態分布</strong>
-      <small class="text-muted">資料來源：learning_episodes（不只看 awaiting，看完整流動）</small>
+      <small class="text-muted">資料來源：learning_episodes（PromotionGate 4 階段流動全景）</small>
     </div>
     <div class="card-body">
-      <div class="row g-2">
-        {% for status, cnt in episode_distribution_30d.items() %}
-        <div class="col-md-2 col-sm-4">
-          <div class="border rounded p-2 text-center">
-            <small class="text-muted d-block">
-              {% if status == 'pending' %}<i class="fas fa-hourglass-start"></i> 待處理
-              {% elif status == 'awaiting_review' %}<i class="fas fa-user-clock"></i> 待審核
-              {% elif status == 'approved' %}<i class="fas fa-check-circle text-success"></i> 已晉升
-              {% elif status == 'rejected_quality' %}<i class="fas fa-times text-danger"></i> 品質拒
-              {% elif status == 'rejected_hallucination' %}<i class="fas fa-times text-danger"></i> 幻覺拒
-              {% elif status == 'rejected_duplicate' %}<i class="fas fa-clone text-warning"></i> 重複拒
-              {% elif status == 'rejected_human' %}<i class="fas fa-user-times text-danger"></i> 人工拒
-              {% elif status == 'expired' %}<i class="fas fa-clock text-muted"></i> 已過期
-              {% else %}{{ status }}{% endif %}
-            </small>
-            <strong style="font-size: 1.4em;">{{ cnt }}</strong>
-          </div>
+      <div class="row g-2 align-items-center">
+        <div class="col-md-5">
+          <canvas id="episodeDistChart" height="200"></canvas>
+        </div>
+        <div class="col-md-7">
+          <table class="table table-sm mb-0" style="font-size: 0.9em;">
+            <thead class="table-light">
+              <tr><th>狀態</th><th class="text-end">筆數</th><th class="text-end">佔比</th></tr>
+            </thead>
+            <tbody>
+              {% set total_ep = (episode_distribution_30d.values() | sum) or 1 %}
+              {% for status, cnt in episode_distribution_30d.items() %}
+              <tr>
+                <td>
+                  {% if status == 'pending' %}<i class="fas fa-hourglass-start me-1"></i>待處理
+                  {% elif status == 'awaiting_review' %}<i class="fas fa-user-clock text-warning me-1"></i>待審核
+                  {% elif status == 'approved' %}<i class="fas fa-check-circle text-success me-1"></i>已晉升
+                  {% elif status == 'rejected_quality' %}<i class="fas fa-times text-danger me-1"></i>品質拒
+                  {% elif status == 'rejected_hallucination' %}<i class="fas fa-times text-danger me-1"></i>幻覺拒
+                  {% elif status == 'rejected_duplicate' %}<i class="fas fa-clone text-warning me-1"></i>重複拒
+                  {% elif status == 'rejected_human' %}<i class="fas fa-user-times text-danger me-1"></i>人工拒
+                  {% elif status == 'expired' %}<i class="fas fa-clock text-muted me-1"></i>已過期
+                  {% else %}{{ status }}{% endif %}
+                </td>
+                <td class="text-end"><strong>{{ cnt }}</strong></td>
+                <td class="text-end">{{ "%.1f"|format(cnt / total_ep * 100) }}%</td>
+              </tr>
+              {% endfor %}
+            </tbody>
+          </table>
         </div>
-        {% endfor %}
       </div>
     </div>
   </div>
@@ -182,7 +194,51 @@
   </small></p>
 </div>
 
+<script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.1/dist/chart.umd.min.js"></script>
 <script>
+// Phase 55 S-1: 蒸餾池 doughnut
+(function() {
+  const dist = {{ episode_distribution_30d | default({}) | tojson }};
+  const el = document.getElementById('episodeDistChart');
+  if (!el || !Object.keys(dist).length) return;
+  const colorMap = {
+    'pending': '#6c757d', 'awaiting_review': '#ffc107',
+    'approved': '#198754',
+    'rejected_quality': '#dc3545', 'rejected_hallucination': '#bd2130',
+    'rejected_duplicate': '#fd7e14', 'rejected_human': '#a71d2a',
+    'expired': '#adb5bd',
+  };
+  const labelMap = {
+    'pending': '待處理', 'awaiting_review': '待審核',
+    'approved': '已晉升',
+    'rejected_quality': '品質拒', 'rejected_hallucination': '幻覺拒',
+    'rejected_duplicate': '重複拒', 'rejected_human': '人工拒',
+    'expired': '已過期',
+  };
+  const keys = Object.keys(dist);
+  new Chart(el, {
+    type: 'doughnut',
+    data: {
+      labels: keys.map(k => labelMap[k] || k),
+      datasets: [{
+        data: keys.map(k => dist[k]),
+        backgroundColor: keys.map(k => colorMap[k] || '#999'),
+        borderWidth: 1, borderColor: '#fff',
+      }]
+    },
+    options: {
+      responsive: true, maintainAspectRatio: false,
+      plugins: {
+        legend: { position: 'right', labels: { font: { size: 11 } } },
+        tooltip: { callbacks: { label: c => {
+          const total = Object.values(dist).reduce((a,b)=>a+b, 0);
+          return `${c.label}: ${c.parsed} (${(c.parsed/total*100).toFixed(1)}%)`;
+        }}}
+      }
+    }
+  });
+})();
+
 async function approveEpisode(id, btn) {
   btn.disabled = true; btn.innerHTML = '<i class="fas fa-spinner fa-spin"></i> 處理中...';
   try {