ui: node drag-to-move, drag-to-child, and copy (v1.0)

- 드래그 핸들(⠿): 노드 카드 헤더 hover 시 표시, 마우스다운으로 드래그 시작
- 드래그 동작:
  - 상단 30% 위 → 해당 노드 앞에 삽입 (파란 상단 선)
  - 하단 30% 아래 → 해당 노드 뒤에 삽입 (파란 하단 선)
  - 중앙 40% → 해당 노드의 하위 노드로 편입 (초록 테두리)
- 복사(⊕): 캔버스 버튼 + detail panel 버튼, 하위 구조 전체 deep clone

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ui/builder.html

@@ -245,6 +245,13 @@ input,textarea,button,select{font-family:inherit}
 .ftpl-role{font-size:9px;border-radius:3px;padding:1px 5px;font-weight:700;margin-left:2px;letter-spacing:.03em}
 .ftpl-role.collect{background:var(--accent-bg);color:var(--accent)}
 .ftpl-role.fixed{background:var(--surface-alt);color:var(--muted);border:1px solid var(--border)}
+/* 드래그 */
+.cnode-drag{font-size:11px;color:var(--border);cursor:grab;flex-shrink:0;opacity:0;transition:opacity .1s;padding:0 2px;user-select:none;line-height:1}
+.cnode:hover .cnode-drag,.cnode.selected .cnode-drag{opacity:1}
+.cnode.dragging{opacity:0.3;pointer-events:none}
+.cnode.drop-child{border-color:var(--green)!important;box-shadow:0 0 0 3px rgba(22,163,74,.2)!important}
+.cnode.drop-before{box-shadow:0 -3px 0 0 var(--accent),var(--sh)!important}
+.cnode.drop-after{box-shadow:0 3px 0 0 var(--accent),var(--sh)!important}
 /* per_line 전용 UI */
 .perline-block{display:flex;align-items:center;gap:7px;padding:5px 6px;background:var(--surface-alt);border:1px solid var(--border);border-radius:5px}
 .perline-lbl{font-size:11px;font-weight:600;color:var(--muted);white-space:nowrap}
@@ -286,7 +293,7 @@ input,textarea,button,select{font-family:inherit}
 <header class="app-header">
   <span style="font-size:18px">🏗️</span>
   <h1>CTStruct</h1>
-  <span class="badge">v0.9</span>
+  <span class="badge">v1.0</span>
 </header>
 
 <nav class="main-nav">
@@ -819,8 +826,9 @@ function renderCanvas(){
     const vals=node.values.filter(v=>v.type!=='node').length;
     const kids=node.values.filter(v=>v.type==='node').length;
     const hint=[vals?`값 ${vals}`:'',kids?`하위 ${kids}`:''].filter(Boolean).join(' · ')||'비어있음';
-    cards+=`<div class="cnode${sel?' selected':''}${col?' collect':''}" style="left:${p.x}px;top:${p.y}px" onclick="selectNode('${node.id}')">
+    cards+=`<div class="cnode${sel?' selected':''}${col?' collect':''}" data-nid="${node.id}" style="left:${p.x}px;top:${p.y}px" onclick="selectNode('${node.id}')">
       <div class="cnode-head">
+        <span class="cnode-drag" onmousedown="startDrag(event,'${node.id}')" onclick="event.stopPropagation()" title="드래그로 이동">⠿</span>
         <span class="cnode-mark">${esc(node.mark||'·')}</span>
         <span class="cnode-name" title="${esc(node.content||'')}">${esc(node.content||'이름 없음')}</span>
         ${col?'<span style="font-size:9px;color:var(--accent);font-weight:700;flex-shrink:0;line-height:1">📥</span>':''}
@@ -831,6 +839,7 @@ function renderCanvas(){
         <div class="cnode-btns">
           <button class="cnode-btn" title="위로" onclick="event.stopPropagation();moveNode('${node.id}',-1)">↑</button>
           <button class="cnode-btn" title="아래로" onclick="event.stopPropagation();moveNode('${node.id}',1)">↓</button>
+          <button class="cnode-btn" title="복사" onclick="event.stopPropagation();copyNode('${node.id}')">⊕</button>
           <button class="cnode-btn" title="하위 노드 추가" onclick="event.stopPropagation();addChildNode('${node.id}')">＋</button>
           <button class="cnode-btn del" title="삭제" onclick="event.stopPropagation();deleteFromCanvas('${node.id}')">✕</button>
         </div>
@@ -861,6 +870,117 @@ function deleteFromCanvas(nid){
   deleteNode(nid);
 }
 
+// ── 노드 트리 직접 조작 ────────────────────────────────
+function removeNodeFromTree(nid){
+  const ti=S.nodes.findIndex(n=>n.id===nid);
+  if(ti!==-1) return S.nodes.splice(ti,1)[0];
+  for(const n of Object.values(nodeMap)){
+    const vi=n.values.findIndex(v=>v.type==='node'&&v.node.id===nid);
+    if(vi!==-1) return n.values.splice(vi,1)[0].node;
+  }
+  return null;
+}
+function insertAsChildOf(node, parentNid){
+  const p=nodeMap[parentNid]; if(!p) return;
+  p.values.push(mkNodeVal(node));
+}
+function insertBeforeNode(node, targetNid){
+  const ti=S.nodes.findIndex(n=>n.id===targetNid);
+  if(ti!==-1){ S.nodes.splice(ti,0,node); return; }
+  for(const n of Object.values(nodeMap)){
+    const vi=n.values.findIndex(v=>v.type==='node'&&v.node.id===targetNid);
+    if(vi!==-1){ n.values.splice(vi,0,mkNodeVal(node)); return; }
+  }
+}
+function insertAfterNode(node, targetNid){
+  const ti=S.nodes.findIndex(n=>n.id===targetNid);
+  if(ti!==-1){ S.nodes.splice(ti+1,0,node); return; }
+  for(const n of Object.values(nodeMap)){
+    const vi=n.values.findIndex(v=>v.type==='node'&&v.node.id===targetNid);
+    if(vi!==-1){ n.values.splice(vi+1,0,mkNodeVal(node)); return; }
+  }
+}
+
+// ── 노드 복사 ──────────────────────────────────────────
+function deepCloneNode(n){
+  function clone(node){
+    const c=mkNode(node.mark,node.content);
+    c.hidden=node.hidden??false;
+    c.nameNewline=node.nameNewline??true;
+    c.settings=JSON.parse(JSON.stringify(node.settings||{}));
+    for(const v of node.values||[]){
+      if(v.type==='node') c.values.push(mkNodeVal(clone(v.node)));
+      else{ const sv=mkScalarVal(v.type); sv.data=v.data??''; c.values.push(sv); }
+    }
+    return c;
+  }
+  return clone(n);
+}
+function copyNode(nid){
+  rebuildMaps();
+  const n=nodeMap[nid]; if(!n) return;
+  const cloned=deepCloneNode(n);
+  insertAfterNode(cloned,nid);
+  selectedNodeId=cloned.id;
+  refresh();
+}
+
+// ── 드래그로 이동 ──────────────────────────────────────
+function startDrag(e, nid){
+  if(e.button!==0) return;
+  e.preventDefault(); e.stopPropagation();
+  const srcEl=document.querySelector(`.cnode[data-nid="${nid}"]`); if(!srcEl) return;
+  const rect=srcEl.getBoundingClientRect();
+
+  const ghost=srcEl.cloneNode(true);
+  ghost.style.cssText=`width:${rect.width}px;position:fixed;left:${rect.left}px;top:${rect.top}px;pointer-events:none;z-index:9999;opacity:.85;transform:rotate(1.5deg) scale(1.04);box-shadow:0 12px 40px rgba(0,0,0,.25);transition:none`;
+  ghost.classList.remove('selected','dragging');
+  document.body.appendChild(ghost);
+  srcEl.classList.add('dragging');
+
+  const state={ nid, ghost, ox:e.clientX-rect.left, oy:e.clientY-rect.top, drop:null };
+
+  function onMove(e){
+    ghost.style.left=(e.clientX-state.ox)+'px';
+    ghost.style.top =(e.clientY-state.oy)+'px';
+    document.querySelectorAll('.cnode.drop-child,.cnode.drop-before,.cnode.drop-after')
+      .forEach(el=>el.classList.remove('drop-child','drop-before','drop-after'));
+    state.drop=null;
+    for(const el of document.querySelectorAll('.cnode:not(.dragging)')){
+      const r=el.getBoundingClientRect();
+      if(e.clientX>=r.left&&e.clientX<=r.right&&e.clientY>=r.top&&e.clientY<=r.bottom){
+        const rel=(e.clientY-r.top)/r.height;
+        const mode=rel<0.3?'before':rel>0.7?'after':'child';
+        el.classList.add('drop-'+mode);
+        state.drop={nid:el.dataset.nid, mode};
+        break;
+      }
+    }
+  }
+
+  function onUp(){
+    ghost.remove();
+    document.querySelectorAll('.cnode').forEach(el=>el.classList.remove('dragging','drop-child','drop-before','drop-after'));
+    document.removeEventListener('mousemove',onMove);
+    document.removeEventListener('mouseup',onUp);
+    if(state.drop&&state.drop.nid!==state.nid){
+      rebuildMaps();
+      const node=removeNodeFromTree(state.nid);
+      if(node){
+        rebuildMaps();
+        if(state.drop.mode==='child')       insertAsChildOf(node, state.drop.nid);
+        else if(state.drop.mode==='before') insertBeforeNode(node, state.drop.nid);
+        else                                insertAfterNode(node, state.drop.nid);
+        selectedNodeId=state.nid;
+        refresh();
+      }
+    }
+  }
+
+  document.addEventListener('mousemove',onMove);
+  document.addEventListener('mouseup',onUp);
+}
+
 function renderDetail(){
   const panel=document.getElementById('detailPanel'); if(!panel) return;
   if(!selectedNodeId||!nodeMap[selectedNodeId]){
@@ -883,6 +1003,7 @@ function renderDetail(){
       <button class="iBtn eye${node.hidden?' off':''}" title="숨기기 토글" onclick="toggleHidden('${node.id}')">👁</button>
       <button class="iBtn mv" onclick="moveNode('${node.id}',-1)" title="위로">↑</button>
       <button class="iBtn mv" onclick="moveNode('${node.id}',1)"  title="아래로">↓</button>
+      <button class="iBtn mv" onclick="copyNode('${node.id}')"    title="복사">⊕</button>
       <button class="iBtn" onclick="deleteFromCanvas('${node.id}')" title="삭제">✕</button>
     </div>
     <div class="detail-body">