feat: 路径查看弹窗改为全屏双栏布局，新增画布预览

- 路径查看弹窗改为 95vw×90vh 大窗口
- 左侧统计+表格，右侧 Canvas 画布预览
- 画布显示扫描区域虚线框、路径扫描线箭头、背景图
- 支持从工具栏打开查看路径文件
- 子任务航线文件行新增"查看"按钮（空路径时禁用）

src/views/MissionEditorView.vue

@@ -21,6 +21,10 @@
               <template #icon><n-icon><CheckmarkCircleOutline /></n-icon></template>
               校验
             </n-button>
+            <n-button size="small" @click="handleViewPath">
+              <template #icon><n-icon><MapOutline /></n-icon></template>
+              查看路径
+            </n-button>
           </n-space>
         </n-space>
 
@@ -143,6 +147,14 @@
                   </template>
                   <n-form-item label="航线文件">
                     <n-input v-model:value="sub.pathLineFilePath" placeholder="航线文件路径" />
+                    <n-button
+                      size="tiny"
+                      style="margin-left: 4px"
+                      :disabled="!sub.pathLineFilePath"
+                      @click="viewPathFile(sub.pathLineFilePath)"
+                    >
+                      查看
+                    </n-button>
                     <n-button size="tiny" style="margin-left: 4px" @click="browsePathLine(sub)">
                       浏览
                     </n-button>
@@ -196,6 +208,29 @@
       </n-space>
     </div>
 
+    <!-- Path viewer modal -->
+    <n-modal v-model:show="showPathModal" title="路径文件查看" preset="card" style="width: 95vw; height: 90vh;">
+      <div v-if="pathViewRecords.length > 0" style="display: flex; gap: 12px; height: 100%;">
+        <div style="flex: 1; display: flex; flex-direction: column; gap: 8px; min-width: 0;">
+          <n-space style="padding: 8px; background: #f5f5f5; border-radius: 4px;">
+            <n-statistic label="记录条数" :value="pathViewRecords.length" />
+          </n-space>
+          <n-data-table
+            :columns="pathColumns"
+            :data="pathViewRecords"
+            size="small"
+            :max-height="9999"
+            virtual-scroll
+            style="flex: 1;"
+          />
+        </div>
+        <div ref="pathPreviewContainer" style="flex: 2; height: 100%; background: #f8f8f8; border: 1px solid #e0e0e0; border-radius: 4px;">
+          <canvas ref="pathPreviewCanvas" style="width: 100%; height: 100%;" />
+        </div>
+      </div>
+      <n-empty v-else description="请选择路径文件" />
+    </n-modal>
+
     <!-- SubTask type selector modal -->
     <n-modal
       v-model:show="showTypeModal"
@@ -223,18 +258,21 @@
 </template>
 
 <script setup lang="ts">
-import { ref, computed } from 'vue';
+import { ref, computed, nextTick } from 'vue';
 import { useRouter } from 'vue-router';
 import { useMessage, useDialog } from 'naive-ui';
 import {
-  ArrowBackOutline, SaveOutline, CalculatorOutline, CheckmarkCircleOutline,
+  ArrowBackOutline, SaveOutline, CalculatorOutline, CheckmarkCircleOutline, MapOutline,
 } from '@vicons/ionicons5';
+import { invoke } from '@tauri-apps/api/core';
 import { useMissionStore } from '../stores/mission';
 import { useValidationStore } from '../stores/validation';
 import { SUBTASK_TYPE_LABELS } from '../utils/constants';
 import { formatDuration, formatDateTime } from '../utils/constants';
 import { isHyperspectral, SubTaskType } from '../types/task';
 import type { SubTask } from '../types/task';
+import type { PathLineRecord } from '../types/path-line';
+import type { DataTableColumn } from 'naive-ui';
 
 const router = useRouter();
 const message = useMessage();
@@ -265,6 +303,20 @@ function getSubTaskLabel(type: string): string {
   return SUBTASK_TYPE_LABELS[type] || type;
 }
 
+const showPathModal = ref(false);
+const pathViewRecords = ref<PathLineRecord[]>([]);
+const pathPreviewContainer = ref<HTMLDivElement>();
+const pathPreviewCanvas = ref<HTMLCanvasElement>();
+const pathColumns: DataTableColumn<PathLineRecord>[] = [
+  { title: 'Y 位置', key: 'targetYPosition', render: r => r.targetYPosition.toFixed(2), width: 80 },
+  { title: 'Y 速度', key: 'speedTargetYPosition', render: r => r.speedTargetYPosition.toFixed(2), width: 80 },
+  { title: 'X 起始', key: 'targetXMinPosition', render: r => r.targetXMinPosition.toFixed(2), width: 80 },
+  { title: 'X 起始速度', key: 'speedTargetXMinPosition', render: r => r.speedTargetXMinPosition.toFixed(2), width: 80 },
+  { title: 'X 结束', key: 'targetXMaxPosition', render: r => r.targetXMaxPosition.toFixed(2), width: 80 },
+  { title: 'X 扫描速度', key: 'speedTargetXMaxPosition', render: r => r.speedTargetXMaxPosition.toFixed(2), width: 80 },
+  { title: '#', key: 'index', render: (_: any, i: number) => i + 1, width: 50 },
+];
+
 const DEFAULT_TIME = '2000-01-01T00:00:00';
 function taskTitle(task: { id: number; scheduledTime: string }): string {
   if (!task.scheduledTime || task.scheduledTime === DEFAULT_TIME) {
@@ -390,6 +442,146 @@ async function browsePathLine(sub: SubTask) {
 function goToPlanner(taskId: number, sub: SubTask) {
   router.push({ path: '/planner', query: { taskId: String(taskId), subTaskId: sub.id } });
 }
+
+async function openPathFile(path: string) {
+  try {
+    const file = await invoke('load_path_line', { path });
+    pathViewRecords.value = (file as any).records || [];
+    showPathModal.value = true;
+    await nextTick();
+    drawPathPreview();
+  } catch (e) {
+    message.error('无法打开路径文件: ' + e);
+  }
+}
+
+async function drawPathPreview() {
+  const canvas = pathPreviewCanvas.value;
+  const container = pathPreviewContainer.value;
+  if (!canvas || !container) return;
+  const records = pathViewRecords.value;
+  if (!records.length) return;
+
+  const w = container.clientWidth;
+  const h = container.clientHeight;
+  const dpr = window.devicePixelRatio || 1;
+  canvas.width = w * dpr;
+  canvas.height = h * dpr;
+  canvas.style.width = w + 'px';
+  canvas.style.height = h + 'px';
+  const ctx = canvas.getContext('2d');
+  if (!ctx) return;
+  ctx.scale(dpr, dpr);
+
+  ctx.fillStyle = '#f8f8f8';
+  ctx.fillRect(0, 0, w, h);
+
+  // Find bounds from records
+  let xMin = Infinity, xMax = -Infinity, yMin = Infinity, yMax = -Infinity;
+  for (const r of records) {
+    xMin = Math.min(xMin, r.targetXMinPosition, r.targetXMaxPosition);
+    xMax = Math.max(xMax, r.targetXMinPosition, r.targetXMaxPosition);
+    yMin = Math.min(yMin, r.targetYPosition);
+    yMax = Math.max(yMax, r.targetYPosition);
+  }
+  const rangeX = xMax - xMin || 1;
+  const rangeY = yMax - yMin || 1;
+  const pad = 30;
+  const drawW = w - pad * 2;
+  const drawH = h - pad * 2;
+
+  function toCanvas(wx: number, wy: number) {
+    return {
+      x: pad + ((wx - xMin) / rangeX) * drawW,
+      y: pad + ((yMax - wy) / rangeY) * drawH,
+    };
+  }
+
+  // Background image
+  const bgPath = missionStore.mission.backgroundImage;
+  if (bgPath) {
+    try {
+      const { convertFileSrc } = await import('@tauri-apps/api/core');
+      const img = new Image();
+      img.onload = () => {
+        ctx.globalAlpha = 0.4;
+        ctx.drawImage(img, 0, 0, w, h);
+        ctx.globalAlpha = 1.0;
+        drawOverlay(ctx, w, h, pad, drawW, drawH, xMin, xMax, yMin, yMax, rangeX, rangeY, toCanvas, records);
+      };
+      img.onerror = () => drawOverlay(ctx, w, h, pad, drawW, drawH, xMin, xMax, yMin, yMax, rangeX, rangeY, toCanvas, records);
+      img.src = convertFileSrc(bgPath);
+      return; // drawOverlay will be called async
+    } catch { /* fall through to drawOverlay */ }
+  }
+  drawOverlay(ctx, w, h, pad, drawW, drawH, xMin, xMax, yMin, yMax, rangeX, rangeY, toCanvas, records);
+}
+
+function drawOverlay(
+  ctx: CanvasRenderingContext2D, _w: number, _h: number, pad: number,
+  drawW: number, drawH: number, xMin: number, xMax: number, yMin: number, yMax: number,
+  _rangeX: number, _rangeY: number,
+  toCanvas: (wx: number, wy: number) => { x: number; y: number },
+  records: PathLineRecord[],
+) {
+  // Grid
+  ctx.strokeStyle = '#e0e0e0';
+  ctx.lineWidth = 1;
+  for (let i = 0; i <= 5; i++) {
+    ctx.beginPath(); ctx.moveTo(pad + (i / 5) * drawW, pad); ctx.lineTo(pad + (i / 5) * drawW, pad + drawH); ctx.stroke();
+    ctx.beginPath(); ctx.moveTo(pad, pad + (i / 5) * drawH); ctx.lineTo(pad + drawW, pad + (i / 5) * drawH); ctx.stroke();
+  }
+
+  // Scan area rectangle
+  const sc = missionStore.mission.scanConfig;
+  if (sc) {
+    const r1 = toCanvas(sc.xMin, sc.yMin);
+    const r2 = toCanvas(sc.xMax, sc.yMax);
+    ctx.strokeStyle = '#f0a020'; ctx.lineWidth = 2;
+    ctx.setLineDash([6, 4]);
+    ctx.strokeRect(r1.x, r1.y, r2.x - r1.x, r2.y - r1.y);
+    ctx.setLineDash([]);
+    ctx.fillStyle = '#f0a020'; ctx.font = '11px sans-serif';
+    ctx.fillText('扫描区域', r1.x + 4, r1.y - 4);
+  }
+
+  // Scan lines
+  for (const record of records) {
+    const start = toCanvas(record.targetXMinPosition, record.targetYPosition);
+    const end = toCanvas(record.targetXMaxPosition, record.targetYPosition);
+    ctx.beginPath(); ctx.moveTo(start.x, start.y); ctx.lineTo(end.x, end.y);
+    ctx.strokeStyle = '#2080f0'; ctx.lineWidth = 1.5; ctx.stroke();
+    const angle = Math.atan2(end.y - start.y, end.x - start.x);
+    ctx.beginPath();
+    ctx.moveTo(end.x, end.y);
+    ctx.lineTo(end.x - 6 * Math.cos(angle - 0.4), end.y - 6 * Math.sin(angle - 0.4));
+    ctx.lineTo(end.x - 6 * Math.cos(angle + 0.4), end.y - 6 * Math.sin(angle + 0.4));
+    ctx.closePath(); ctx.fillStyle = '#2080f0'; ctx.fill();
+  }
+
+  // Labels
+  ctx.fillStyle = '#999'; ctx.font = '10px sans-serif';
+  ctx.fillText(xMin.toFixed(0), pad - 2, pad + drawH + 14);
+  ctx.fillText(xMax.toFixed(0), pad + drawW - 10, pad + drawH + 14);
+  ctx.fillText(yMin.toFixed(0), 2, pad + drawH + 4);
+  ctx.fillText(yMax.toFixed(0), 2, pad + 4);
+}
+
+async function handleViewPath() {
+  try {
+    const { open } = await import('@tauri-apps/plugin-dialog');
+    const selected = await open({
+      filters: [{ name: 'RecordLine3', extensions: ['RecordLine3'] }],
+      multiple: false,
+    });
+    if (selected) await openPathFile(selected);
+  } catch { /* cancelled */ }
+}
+
+async function viewPathFile(filePath: string) {
+  if (!filePath) return;
+  await openPathFile(filePath);
+}
 </script>
 
 <style scoped>