feat(admin): 选人教师树(仿 Notice GetSchoolAll)——组树剔除学生组, YschClassOpenApi.getSchTeaList 按 GroupIds 挂组+空组剪枝 (GET /admin/user/teacherTree); 管理端新增 /def/diagram.png 示意图页进度图 <img> 直嵌

src/main/java/com/yunhai/flowcenter/controller/api/FlowAdminController.java

@@ -18,6 +18,8 @@ import lombok.RequiredArgsConstructor;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Sort;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
@@ -45,6 +47,7 @@ public class FlowAdminController {
     private final FlowCallbackAdminService callbackAdminService;
     private final FlwInstanceRepository instanceRepository;
     private final FlowDiagramService diagramService;
+    private final com.yunhai.flowcenter.service.DiagramImageService imageService;
 
     // ==================== 流程定义 ====================
 
@@ -93,6 +96,21 @@ public class FlowAdminController {
         return diagramService.build(def, null, mode);
     }
 
+    /**
+     * 流程定义示意图 PNG 流（2026-09-17，示意图页"进度图"视图）：<img> 直嵌走同域 CAS 会话，
+     * 可见性与 /def/diagram 同口径（requireAdmin）。
+     */
+    @GetMapping("/def/diagram.png")
+    public ResponseEntity<byte[]> defDiagramPng(BoaUser user, @RequestParam("id") Long id,
+                                                @RequestParam(value = "mode", required = false) String mode) {
+        Long schId = adminGuard.requireAdmin(user, null);
+        FlwDef def = defAdminService.get(schId, id);
+        return ResponseEntity.ok()
+                .contentType(MediaType.IMAGE_PNG)
+                .cacheControl(org.springframework.http.CacheControl.noStore())
+                .body(imageService.renderPng(diagramService.build(def, null, mode)));
+    }
+
     // ==================== 办理人映射 ====================
 
     @GetMapping("/map/list")
@@ -146,6 +164,15 @@ public class FlowAdminController {
         return mapAdminService.userTree(adminGuard.requireAdmin(user, null));
     }
 
+    /**
+     * 选人组件树·教师版（2026-09-17，仿 Notice /api/base/GetSchoolAll）：组树骨架（剔除学生组）+
+     * userclass 教师按 GroupIds 挂组，管理端「选择用户」统一走它。
+     */
+    @GetMapping("/user/teacherTree")
+    public List<FlowMapAdminService.SelectUserNodeVo> teacherTree(BoaUser user) {
+        return mapAdminService.teacherTree(adminGuard.requireAdmin(user, null));
+    }
+
     // ==================== 回调注册/推送日志/死信 ====================
 
     @GetMapping("/callback/regList")