feat(generator): apply md/50 transfer spec

md/49_AI_PROMPT_GENERATOR.md

@@ -237,15 +237,14 @@
           </div>
           <div>
             <label class="block text-[10px] font-bold text-slate-400 uppercase tracking-wider mb-1">DANH MỤC</label>
-            <input type="text" id="presetCategoryInput" list="categoryDatalist" class="w-full bg-[#1a1c23] border border-slate-800 rounded-lg px-3 py-2 text-white focus:outline-none focus:border-purple-500 font-sans" value="Orchestral / Film Score" placeholder="Chọn hoặc nhập danh mục...">
-            <datalist id="categoryDatalist">
-              <option value="Orchestral / Film Score"></option>
-              <option value="Piano Solo"></option>
-              <option value="EDM / Pop"></option>
-              <option value="Cinematic"></option>
-              <option value="Jazz & Swing"></option>
-              <option value="Lo-fi Chillhop"></option>
-            </datalist>
+            <select id="presetCategorySelect" class="w-full bg-[#1a1c23] border border-slate-800 rounded-lg px-3 py-2 text-white focus:outline-none focus:border-purple-500 font-sans">
+              <option value="Orchestral / Film Score">Orchestral / Film Score</option>
+              <option value="Piano Solo">Piano Solo</option>
+              <option value="EDM / Pop">EDM / Pop</option>
+              <option value="Cinematic">Cinematic</option>
+              <option value="Jazz & Swing">Jazz & Swing</option>
+              <option value="Lo-fi Chillhop">Lo-fi Chillhop</option>
+            </select>
           </div>
         </div>
 
@@ -280,18 +279,25 @@
       </div>
 
       <!-- Action Buttons Row -->
-      <div class="flex items-center justify-between pt-2 border-t border-slate-800/80">
-        <div class="flex items-center gap-2">
-          <button id="btnModalBack" class="px-4 py-2 bg-slate-800 hover:bg-slate-700 text-slate-300 rounded-lg text-xs font-semibold transition-colors">
-            Quay lại
+      <div class="space-y-3 pt-2 border-t border-slate-800/80">
+        <div class="flex items-center justify-between">
+          <button id="btnCreateStructuredPreset" class="px-4 py-2 bg-emerald-700 hover:bg-emerald-600 text-white rounded-lg text-xs font-bold transition-all shadow-md flex items-center gap-1.5">
+            <i class="fa-solid fa-wand-magic-sparkles"></i> Tạo preset có cấu trúc
           </button>
-          <button id="btnSavePresetSubmit" class="px-5 py-2 bg-purple-600 hover:bg-purple-500 text-white rounded-lg text-xs font-bold transition-all shadow-lg shadow-purple-950/80 flex items-center gap-1.5">
-            <i class="fa-solid fa-floppy-disk"></i> <span>Lưu Preset</span>
+          <div class="flex items-center gap-2">
+            <button id="btnModalBack" class="px-4 py-2 bg-[#252836] hover:bg-slate-700 text-slate-300 rounded-lg text-xs font-semibold transition-colors">
+              Quay lại
+            </button>
+            <button id="btnSavePresetSubmit" class="px-5 py-2 bg-purple-600 hover:bg-purple-500 text-white rounded-lg text-xs font-bold transition-all shadow-lg shadow-purple-950/80 flex items-center gap-1.5">
+              <i class="fa-solid fa-floppy-disk"></i> <span>Lưu Preset</span>
+            </button>
+          </div>
+        </div>
+        <div class="flex justify-end">
+          <button id="btnCloseModalBottom" class="px-4 py-1.5 bg-[#1f222e] hover:bg-slate-700 text-slate-300 rounded-lg text-xs font-semibold transition-colors">
+            Đóng
           </button>
         </div>
-        <button id="btnCloseModalBottom" class="px-4 py-1.5 bg-slate-800 hover:bg-slate-700 text-slate-300 rounded-lg text-xs font-semibold transition-colors">
-          Đóng
-        </button>
       </div>
 
     </div>
@@ -406,8 +412,9 @@
     const btnCloseModalBottom = document.getElementById('btnCloseModalBottom');
     const btnModalBack = document.getElementById('btnModalBack');
     const btnSavePresetSubmit = document.getElementById('btnSavePresetSubmit');
+    const btnCreateStructuredPreset = document.getElementById('btnCreateStructuredPreset');
     const presetNameInput = document.getElementById('presetNameInput');
-    const presetCategoryInput = document.getElementById('presetCategoryInput');
+    const presetCategorySelect = document.getElementById('presetCategorySelect');
     const presetKeywordsInput = document.getElementById('presetKeywordsInput');
     const presetBarsInput = document.getElementById('presetBarsInput');
     const presetBpmInput = document.getElementById('presetBpmInput');
@@ -647,18 +654,35 @@
       }, 2500);
     }
 
-    // Open Save Preset Modal Event Handler
+    // Open Save Preset Modal Event Handler — auto-populate per spec
     btnSavePresetModal.addEventListener('click', () => {
       const timeData = computeTimeMetrics();
-      const currentPromptText = promptOutputText.innerText;
+      const currentPromptText = promptOutputText.innerText.trim();
 
-      // Auto-populate Preset Form Fields
       const sectionType = inputSectionType.value.trim() || "Building Section";
       const role = inputRole.value.trim() || "Composer";
-      
+      const actionDesc = inputActionDesc.value.trim();
+
+      // Auto-infer Category based on Role
+      let category = "Orchestral / Film Score";
+      const roleLower = role.toLowerCase();
+      if (roleLower.includes("piano")) category = "Piano Solo";
+      else if (roleLower.includes("edm") || roleLower.includes("electro")) category = "EDM / Pop";
+      else if (roleLower.includes("jazz")) category = "Jazz & Swing";
+      else if (roleLower.includes("lo-fi") || roleLower.includes("chillhop")) category = "Lo-fi Chillhop";
+
+      // Auto-generate Keyword Tags
+      const keywordList = [
+        sectionType.toLowerCase(),
+        roleLower.split(' ')[0],
+        `${timeData.barCount} bars`
+      ];
+      const keywordsStr = keywordList.filter(Boolean).join(', ');
+
+      // Populate Form Fields
       presetNameInput.value = `${sectionType} (${timeData.barCount} Bars)`;
-      presetCategoryInput.value = role.includes("piano") ? "Piano Solo" : "Orchestral / Film Score";
-      presetKeywordsInput.value = `${sectionType.toLowerCase()}, ${role.toLowerCase().split(' ')[0]}, ${timeData.barCount} bars`;
+      presetCategorySelect.value = category;
+      presetKeywordsInput.value = keywordsStr;
       presetBarsInput.value = timeData.barCount;
       presetBpmInput.value = 120;
       presetScaleInput.value = "C Minor";
@@ -677,10 +701,25 @@
       }
     });
 
-    // Save Preset Action Handler (Saves to daw_ai_prompt_presets localStorage)
+    // Create Structured Preset — replace static numbers with template variables
+    btnCreateStructuredPreset.addEventListener('click', () => {
+      let promptText = presetTemplateTextarea.value;
+      const bars = presetBarsInput.value || "8";
+
+      promptText = promptText
+        .replace(new RegExp(`dài ${bars} ô nhịp`, 'g'), 'dài {{bars}} ô nhịp')
+        .replace(/Từ Ô nhịp \d+ đến \d+/g, 'Từ Ô nhịp {{start_bar}} đến {{end_bar}}')
+        .replace(/Phách 0\.0 đến \d+\.0/g, 'Phách 0.0 đến {{total_beats}}')
+        .replace(/phách \d+\.0/g, 'phách {{total_beats}}');
+
+      presetTemplateTextarea.value = promptText;
+      showToast("Đã chuyển đổi Prompt thành mẫu biến cấu trúc!");
+    });
+
+    // Save Preset Action Handler (Saves to daw_ai_prompt_presets localStorage & dispatches event)
     btnSavePresetSubmit.addEventListener('click', () => {
       const name = presetNameInput.value.trim();
-      const category = presetCategoryInput.value.trim() || "General";
+      const category = presetCategorySelect.value;
       const keywordsRaw = presetKeywordsInput.value.trim();
       const defaultBars = parseInt(presetBarsInput.value) || 8;
       const defaultBpm = parseInt(presetBpmInput.value) || 120;
@@ -726,6 +765,8 @@
 
       try {
         localStorage.setItem('daw_ai_prompt_presets', JSON.stringify(savedPresets));
+        // Dispatch Custom Event so parent window updates preset list instantly
+        window.dispatchEvent(new CustomEvent('AI_PRESET_SAVED', { detail: newPresetObj }));
         showToast(`Đã lưu Preset "${name}" thành công!`);
         presetManagerModal.classList.add('hidden');
       } catch (e) {