feat(web): 新增后台线路拓扑图布局编辑器，允许手动拖拽调整所有站点坐标

web/ticket-order.js

@@ -209,10 +209,28 @@
           }
 
           stationXByCanonical = {};
+          stationYByCanonical = {};
+          const customXByCanonical = {};
+          const customYByCanonical = {};
+          
+          for (const s of stationsData) {
+              const code = String(s.code || s.编号 || '').trim();
+              if (!code) continue;
+              const canonical = stationCanonicalByCode[code] || code;
+              if (s.svg_x != null && s.svg_y != null) {
+                  customXByCanonical[canonical] = Number(s.svg_x);
+                  customYByCanonical[canonical] = Number(s.svg_y);
+              }
+          }
+
           for (const canonical of Object.keys(occurrences)) {
-              const arr = occurrences[canonical];
-              const avg = arr.reduce((a,b)=>a+b,0) / Math.max(1, arr.length);
-              stationXByCanonical[canonical] = startX + Math.round(avg);
+              if (customXByCanonical[canonical] != null) {
+                  stationXByCanonical[canonical] = customXByCanonical[canonical];
+              } else {
+                  const arr = occurrences[canonical];
+                  const avg = arr.reduce((a,b)=>a+b,0) / Math.max(1, arr.length);
+                  stationXByCanonical[canonical] = startX + Math.round(avg);
+              }
           }
 
           for (let pass = 0; pass < 3; pass++) {
@@ -221,6 +239,10 @@
                   for (const code of li.stops) {
                       if (code === '-') continue;
                       const canonical = stationCanonicalByCode[code] || code;
+                      if (customXByCanonical[canonical] != null) {
+                          prevX = customXByCanonical[canonical];
+                          continue;
+                      }
                       const x = stationXByCanonical[canonical] ?? (prevX + minGapX);
                       const nx = Math.max(x, prevX + minGapX);
                       if (stationXByCanonical[canonical] == null || nx > stationXByCanonical[canonical]) {
@@ -234,18 +256,21 @@
           // 3. Assign Grid Y to canonical stations (Average of their lines)
           const hubYByCanonical = {};
           for (const canonical of Object.keys(lineIdxsByCanonical)) {
+              if (customYByCanonical[canonical] != null) {
+                  hubYByCanonical[canonical] = customYByCanonical[canonical];
+                  continue;
+              }
               const idxs = Array.from(lineIdxsByCanonical[canonical] || []).sort((a, b) => a - b);
               if (!idxs.length) continue;
               const ys = idxs.map(idx => baseY + idx * lineGapY);
               hubYByCanonical[canonical] = ys.reduce((sum, y) => sum + y, 0) / ys.length;
           }
 
-          stationYByCanonical = {};
           for (const li of lineStops) {
               const yNode = baseY + li.idx * lineGapY;
               for (const c of li.stops) {
                   const canonical = stationCanonicalByCode[c] || c;
-                  stationYByCanonical[c] = hubYByCanonical[canonical] ?? yNode;
+                  stationYByCanonical[c] = customYByCanonical[canonical] ?? hubYByCanonical[canonical] ?? yNode;
               }
           }
 
@@ -396,8 +421,9 @@
           const allCanonicals = Object.keys(stationXByCanonical);
           const minX = Math.min(...allCanonicals.map(c => stationXByCanonical[c] || 0));
           const maxX = Math.max(...allCanonicals.map(c => stationXByCanonical[c] || 0));
+          const maxY = Math.max(...allCanonicals.map(c => stationYByCanonical[c] || 0));
           const width = Math.max(560, maxX + 200);
-          const height = Math.max(260, baseY + currentLineIdx * lineGapY + 120);
+          const height = Math.max(260, maxY + 120, baseY + lineStops.length * lineGapY + 120);
           mapContainer.innerHTML = `<svg width="${width}" height="${height}" viewBox="0 0 ${width} ${height}">${svgContent}</svg>`;
           
       } catch(e) {