發佈 0.1.6：速度固定 Fast，移除選項與 footer 顯示

摘要：
速度（service tier）固定為 priority（Fast 1.5x）：表單移除速度下拉、
footer 不再顯示 Fast 字樣；舊設定檔存空值也會矯正回 priority。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/web/public/index.html

@@ -217,10 +217,7 @@
     <div class="field">
       <label>推理強度</label>
       <select id="f-effort"></select>
-    </div>
-    <div class="field">
-      <label>速度</label>
-      <select id="f-tier"></select>
+      <div class="hint">速度固定為 Fast（1.5x）</div>
     </div>
     <div class="field">
       <label>逾時（分鐘）</label>
@@ -314,7 +311,7 @@ async function loadModels() {
   } catch { modelsCache = []; }
 }
 // 下拉沒有「預設」空選項：直接把真實預設值選起來
-function populateModelSelects(selModel, selEffort, selTier) {
+function populateModelSelects(selModel, selEffort) {
   const mSel = document.getElementById('f-model');
   let opts = modelsCache.map(m => '<option value="' + esc(m.slug) + '">' + esc(m.label) + '</option>').join('');
   // 設定檔裡有但快取沒有的模型（手填過的）也要能顯示
@@ -326,9 +323,9 @@ function populateModelSelects(selModel, selEffort, selTier) {
   const wanted = selModel || modelDefaults.model;
   mSel.value = wanted;
   if (mSel.value !== wanted || !mSel.value) mSel.selectedIndex = 0;
-  syncEffortTier(selEffort, selTier);
+  syncEffortTier(selEffort);
 }
-function syncEffortTier(selEffort, selTier) {
+function syncEffortTier(selEffort) {
   const slug = document.getElementById('f-model').value;
   const m = modelsCache.find(x => x.slug === slug);
   let efforts = m ? m.efforts.slice() : ['low', 'medium', 'high', 'xhigh', 'max'];
@@ -341,22 +338,6 @@ function syncEffortTier(selEffort, selTier) {
     : efforts.includes(modelDefaults.effort) ? modelDefaults.effort
     : (m && efforts.includes(m.defaultEffort)) ? m.defaultEffort
     : efforts[0];
-
-  const tiers = m ? m.tiers.slice() : [];
-  const tSel = document.getElementById('f-tier');
-  const prevT = (selTier !== undefined && selTier !== '') ? selTier : tSel.value;
-  if (!tiers.length) {
-    tSel.innerHTML = '<option value="">標準</option>';
-    tSel.value = '';
-  } else {
-    // 模型快取只列「額外」的速度層級，補一個標準選項在前面
-    tSel.innerHTML = '<option value="">標準</option>' +
-      tiers.map(t => '<option value="' + esc(t.id) + '">' + esc(t.name) + (t.description ? '（' + esc(t.description) + '）' : '') + '</option>').join('');
-    tSel.value = tiers.some(t => t.id === prevT) ? prevT
-      : tiers.some(t => t.id === modelDefaults.tier) ? modelDefaults.tier
-      : tiers.some(t => t.id === (m && m.defaultTier)) ? m.defaultTier
-      : '';
-  }
 }
 
 // ---------- Bot 管理 ----------
@@ -393,8 +374,8 @@ function renderBots(bots) {
       '<td>' + statusBadge(b.status) + '</td>' +
       '<td><span class="mono" title="' + esc(b.workDir) + '">' + esc(shortPath(b.workDir)) + '</span></td>' +
       '<td class="mono">' + esc(b.sandbox || '-') +
-        ((b.model || b.reasoningEffort || b.serviceTier)
-          ? '<br><span class="script-name">' + esc([b.model, b.reasoningEffort, b.serviceTier].filter(Boolean).join(' / ')) + '</span>'
+        ((b.model || b.reasoningEffort)
+          ? '<br><span class="script-name">' + esc([b.model, b.reasoningEffort].filter(Boolean).join(' / ')) + '</span>'
           : '') + '</td>' +
       '<td class="mono">' + esc(b.tokenMasked || '-') + '</td>' +
       '<td>' + fmtBytes(b.memory) + '</td>' +
@@ -462,7 +443,7 @@ function openCreate() {
   document.getElementById('f-token-hint').textContent = '跟 @BotFather 申請；儲存時會自動驗證';
   document.getElementById('f-workdir').value = '';
   document.getElementById('f-sandbox').value = 'workspace-write';
-  populateModelSelects('', '', '');
+  populateModelSelects('', '');
   document.getElementById('f-timeout').value = '30';
   document.getElementById('f-autostart-wrap').style.display = '';
   document.getElementById('f-autostart').checked = true;
@@ -483,7 +464,7 @@ function openEdit(name) {
   document.getElementById('f-token-hint').textContent = '留空表示沿用現有 token';
   document.getElementById('f-workdir').value = b.workDir || '';
   document.getElementById('f-sandbox').value = b.sandbox || 'workspace-write';
-  populateModelSelects(b.model || '', b.reasoningEffort || '', b.serviceTier || '');
+  populateModelSelects(b.model || '', b.reasoningEffort || '');
   document.getElementById('f-timeout').value = b.timeoutMinutes || 30;
   document.getElementById('f-autostart-wrap').style.display = 'none';
   document.getElementById('bot-modal').classList.add('show');
@@ -504,7 +485,6 @@ async function saveBot() {
     sandbox: document.getElementById('f-sandbox').value,
     model: document.getElementById('f-model').value,
     reasoningEffort: document.getElementById('f-effort').value,
-    serviceTier: document.getElementById('f-tier').value,
     timeoutMinutes: document.getElementById('f-timeout').value,
   };
   try {