路线地图/节点卡片/详情按出行方式显示不同图标（批 19）

出行方式（飞机/火车/游船/自驾/地铁…）原本在路线地图标记、节点卡片交通行、
节点详情「出行方式」行一律显示节点类型图标（赶路节点恒为 🚗），易让人误解。

- TravelModeController 新增 MODE_ICONS（mode_type → emoji 映射）
- ActivityController::show() 两路查询 LEFT JOIN travel_modes 取 mode_type，注入 modeIcons
- 路线地图标记 / 卡片交通行 / 详情出行方式行：优先用出行方式图标，
  未选出行方式时回退节点类型图标

src/Controllers/ActivityController.php

@@ -314,18 +314,22 @@ class ActivityController
             exit('活动不存在');
         }
 
-        $stmt = $db->prepare('SELECT tn.*, nt.name AS node_type_name, nt.icon AS node_type_icon
+        $stmt = $db->prepare('SELECT tn.*, nt.name AS node_type_name, nt.icon AS node_type_icon,
+                tm.mode_type AS travel_mode_type
             FROM trip_nodes tn
             LEFT JOIN node_types nt ON nt.id = tn.node_type_id
+            LEFT JOIN travel_modes tm ON tm.id = tn.travel_mode_id
             WHERE tn.activity_id = ? AND tn.node_category = "plan"
             ORDER BY tn.start_time ASC');
         $stmt->execute([$id]);
         $planNodes = $stmt->fetchAll();
         $this->attachCounts($db, $planNodes);
 
-        $stmt = $db->prepare('SELECT tn.*, nt.name AS node_type_name, nt.icon AS node_type_icon
+        $stmt = $db->prepare('SELECT tn.*, nt.name AS node_type_name, nt.icon AS node_type_icon,
+                tm.mode_type AS travel_mode_type
             FROM trip_nodes tn
             LEFT JOIN node_types nt ON nt.id = tn.node_type_id
+            LEFT JOIN travel_modes tm ON tm.id = tn.travel_mode_id
             WHERE tn.activity_id = ? AND tn.node_category = "reality"
             ORDER BY tn.start_time ASC');
         $stmt->execute([$id]);
@@ -352,6 +356,8 @@ class ActivityController
             'nodeMembers'     => $nodeMembers,
             // 路线地图：每个执行节点第一张图片附件 id（圆形标记用），一条 GROUP BY 防止 N+1
             'nodeFirstImage'  => Attachments::firstImageIdsForNodes(array_column($realityNodes, 'id')),
+            // 批 19：路线地图标记图标按出行方式映射（回退节点类型图标）
+            'modeIcons'       => TravelModeController::MODE_ICONS,
             'expenseSummary'  => Expenses::summaryForActivity($id),
             'commentTree'     => Comments::tree(Comments::TARGET_ACTIVITY, $id),
             'pageTitle'       => $activity['title'],

src/Controllers/NodeController.php

@@ -316,6 +316,8 @@ class NodeController
                 'travel_mode_label' => $travelModeLabel,
                 'travel_mode_type'  => $travelModeType,
             ]),
+            // 批 19：出行方式图标映射，节点详情「出行方式」行前展示
+            'modeIcons' => TravelModeController::MODE_ICONS,
             'attachmentCount' => $attachmentCount,
             'attachments'     => $nodeAttachments,
             'members'         => Members::forNode($nodeId),

src/Controllers/TravelModeController.php

@@ -22,6 +22,25 @@ class TravelModeController
         'other'        => '其他',
     ];
 
+    /**
+     * 出行方式 → 地图/卡片上的图标（emoji）。
+     * 自驾两类仍用 🚗（本来就是开车）；其余按交通工具区分，
+     * 避免路线地图上「一律汽车」让人误解（批 19）。未列入的 mode_type 回退到节点类型图标。
+     */
+    public const MODE_ICONS = [
+        'drive_own'    => '🚗',
+        'drive_rental' => '🚙',
+        'train'        => '🚄',
+        'plane'        => '✈️',
+        'bus'          => '🚌',
+        'subway'       => '🚇',
+        'taxi'         => '🚕',
+        'bike'         => '🚲',
+        'walk'         => '🚶',
+        'ship'         => '🚢',
+        'other'        => '🔀',
+    ];
+
     public function index(): void
     {
         $this->requireLogin();