diff --git a/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrCaseService.java b/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrCaseService.java
index 29d9654a..3df83103 100644
--- a/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrCaseService.java
+++ b/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrCaseService.java
@@ -339,7 +339,11 @@ public class AihrCaseService {
 
     private String resolveUploadProject(String requestedProject, List<String> projectScopes) {
         if (projectScopes == null) {
-            return firstNonBlank(requestedProject, "");
+            String project = clean(requestedProject);
+            if (project.isBlank()) {
+                throw new IllegalArgumentException("系统用户上传案例必须明确所属项目");
+            }
+            return project;
         }
         if (projectScopes.isEmpty()) {
             throw new IllegalArgumentException("当前账号没有可用项目身份，暂不能提交案例");
diff --git a/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrCaseServiceTest.java b/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrCaseServiceTest.java
index 270dcf8a..31e03eb4 100644
--- a/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrCaseServiceTest.java
+++ b/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrCaseServiceTest.java
@@ -15,6 +15,7 @@ import java.util.Optional;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
@@ -82,6 +83,16 @@ class AihrCaseServiceTest {
         assertTrue(AihrCaseService.caseProjectAllowed("P1", null));
     }
 
+    @Test
+    @Tag("dev")
+    void systemUploadRequiresExplicitProject() {
+        AihrCaseService service = new AihrCaseService(null, null, new ObjectMapper(), new CaseJdbcTemplate());
+
+        assertThrows(IllegalArgumentException.class, () -> service.upload(
+            new MockMultipartFile("file", "case.webm", "audio/webm", new byte[]{1}), "", null
+        ));
+    }
+
     @Test
     @Tag("dev")
     void caseContributorPositionRecognizesProjectManagersAndLeads() {
diff --git a/docs/BRD_IMPLEMENTATION_AUDIT.md b/docs/BRD_IMPLEMENTATION_AUDIT.md
index 81778338..cdfe6395 100644
--- a/docs/BRD_IMPLEMENTATION_AUDIT.md
+++ b/docs/BRD_IMPLEMENTATION_AUDIT.md
@@ -18,7 +18,7 @@
 | 候选人面试与 HR 复核 | `mobile-uni/src/pages/candidate/*`、`frontend/src/views/recruit/interview.vue` | 工程闭环已在位；候选人资料移动端上传/列表现在只接受 APP 候选人本人身份，HR 继续通过独立审核接口处理；需继续保留人工复核证据 |
 | SOP/RAG/资料处理 | `frontend/src/views/knowledge/*`、`backend/.../AihrSopSeedService.java` | 搜索、引用、反馈、异步处理和评审入口已在位 |
 | 对练/每日题/主管带教 | `backend/.../AihrPracticeSeedService.java`、`mobile-uni/src/pages/user/practice` | 主闭环已在位；低分再练、错题归因仍需更明确的用户可见闭环 |
-| 案例上传/整理/筛选 | `backend/.../AihrCaseService.java`、`mobile-uni/src/pages/user/cases`、`frontend/src/views/knowledge/cases.vue` | 上传与整理已在位，案例状态在内存缺失时可从 `aihr_case_record` 回读恢复；APP 用户的读取按项目范围校验，写入接口已增加“主管/项目经理/系统用户”门禁，普通员工不能提交、整理或入库案例；当前仓库仍没有可用预渲染视频样片资产，也没有稳定的案例详情/学习点模型，不能用假播放器宣称案例学习闭环完成 |
+| 案例上传/整理/筛选 | `backend/.../AihrCaseService.java`、`mobile-uni/src/pages/user/cases`、`frontend/src/views/knowledge/cases.vue` | 上传与整理已在位，案例状态在内存缺失时可从 `aihr_case_record` 回读恢复；APP 用户的读取按项目范围校验，写入接口已增加“主管/项目经理/系统用户”门禁，普通员工不能提交、整理或入库案例；本轮补上管理端上传的项目选择与后端无项目拒绝，避免案例落成员工不可见的无范围记录；当前仓库仍没有可用预渲染视频样片资产，也没有稳定的案例详情/学习点模型，不能用假播放器宣称案例学习闭环完成 |
 
 ## 3. 未完成项与优先级
 
diff --git a/frontend/src/views/knowledge/cases.vue b/frontend/src/views/knowledge/cases.vue
index cc25d587..d64c4786 100644
--- a/frontend/src/views/knowledge/cases.vue
+++ b/frontend/src/views/knowledge/cases.vue
@@ -10,7 +10,7 @@
         <span class="status-pill" :class="apiPill.type">{{ apiPill.label }}</span>
         <span class="status-pill" :class="flowStatus.type">{{ flowStatus.label }}</span>
         <el-button @click="router.push('/index')">返回首页</el-button>
-        <el-button type="danger" @click="audioInput?.click()">上传语音</el-button>
+        <el-button type="danger" :disabled="!projectExtOrgId" @click="openAudioPicker">上传语音</el-button>
       </div>
     </section>
 
@@ -20,10 +20,39 @@
           <el-icon><Microphone /></el-icon>
           <h2>上传与转写</h2>
         </div>
-        <div class="upload-box" @click="audioInput?.click()">
+        <div class="project-selector">
+          <label for="case-project">案例所属项目</label>
+          <el-select
+            id="case-project"
+            v-model="projectExtOrgId"
+            class="project-select"
+            clearable
+            filterable
+            :loading="projectsLoading"
+            placeholder="先选择项目，再上传案例"
+          >
+            <el-option v-for="project in projectOptions" :key="project.projectCode" :label="project.projectName" :value="project.projectCode" />
+          </el-select>
+          <el-alert
+            v-if="!projectsLoading && !projectOptions.length"
+            title="暂无可用项目，请先在“组织与权限”完成组织同步预检"
+            type="warning"
+            :closable="false"
+            show-icon
+          />
+        </div>
+        <div class="upload-box" :class="{ disabled: !projectExtOrgId }" @click="openAudioPicker">
           <el-icon><FolderChecked /></el-icon>
           <strong>{{ audioUploaded ? displayFileName : '选择语音文件' }}</strong>
-          <span>{{ audioUploaded ? '真实语音已完成 ASR 转写。' : '支持 mp3/wav/m4a/webm/ogg，需先配置 ASR 模型。' }}</span>
+          <span>
+            {{
+              audioUploaded
+                ? '真实语音已完成 ASR 转写。'
+                : projectExtOrgId
+                  ? '支持 mp3/wav/m4a/webm/ogg，需先配置 ASR 模型。'
+                  : '请先选择案例所属项目。'
+            }}
+          </span>
         </div>
         <div v-if="audioUploaded" class="transcript-card">
           <span>ASR 转写结果</span>
@@ -129,6 +158,7 @@ import {
   type CaseSummaryItem,
   type CaseTag
 } from '@/api/aihr/case';
+import { getOrgSnapshot, type OrgProjectOption } from '@/api/aihr/mobile-admin';
 
 const router = useRouter();
 
@@ -148,6 +178,9 @@ const apiSampleHint = ref('');
 const recordsLoading = ref(false);
 const detailVisible = ref(false);
 const caseDetail = ref<CaseDetailResponse | null>(null);
+const projectExtOrgId = ref('');
+const projectOptions = ref<OrgProjectOption[]>([]);
+const projectsLoading = ref(false);
 
 const displayFileName = computed(() => apiFileName.value || '未选择文件');
 const displayTranscript = computed(() => apiTranscript.value || '暂无转写结果');
@@ -266,7 +299,35 @@ async function handleAudioPicked(event: Event) {
   await uploadAudio(file);
 }
 
+function openAudioPicker() {
+  if (!projectExtOrgId.value) {
+    ElMessage.warning('请先选择案例所属项目');
+    return;
+  }
+  audioInput.value?.click();
+}
+
+async function loadProjectOptions() {
+  projectsLoading.value = true;
+  try {
+    const { data } = await getOrgSnapshot({ status: 'active', pageNum: 1, pageSize: 1 });
+    projectOptions.value = data?.projects ?? [];
+    if (projectOptions.value.length === 1) {
+      projectExtOrgId.value = projectOptions.value[0].projectCode;
+    }
+  } catch {
+    projectOptions.value = [];
+    ElMessage.warning('项目列表加载失败，请先检查组织同步配置');
+  } finally {
+    projectsLoading.value = false;
+  }
+}
+
 async function uploadAudio(file: File) {
+  if (!projectExtOrgId.value) {
+    ElMessage.warning('请先选择案例所属项目');
+    return;
+  }
   audioUploaded.value = false;
   organized.value = false;
   reviewed.value = false;
@@ -279,6 +340,7 @@ async function uploadAudio(file: File) {
   try {
     const form = new FormData();
     form.append('file', file);
+    form.append('projectExtOrgId', projectExtOrgId.value);
     const { data } = await uploadCaseAudio(form);
     caseId.value = data.caseId;
     apiMode.value = 'api';
@@ -353,6 +415,7 @@ async function storeCase() {
 
 onMounted(() => {
   void loadCaseRecords();
+  void loadProjectOptions();
 });
 </script>
 
@@ -444,6 +507,11 @@ onMounted(() => {
   color: #657184;
   cursor: pointer;
 
+  &.disabled {
+    cursor: not-allowed;
+    opacity: 0.7;
+  }
+
   .el-icon {
     color: #d70f20;
     font-size: 38px;
@@ -455,6 +523,22 @@ onMounted(() => {
   }
 }
 
+.project-selector {
+  display: grid;
+  gap: 8px;
+  margin-bottom: 12px;
+
+  label {
+    color: #344255;
+    font-size: 13px;
+    font-weight: 600;
+  }
+}
+
+.project-select {
+  width: 100%;
+}
+
 .transcript-card,
 .sample-card {
   margin-top: 12px;
diff --git a/scripts/demo-check.sh b/scripts/demo-check.sh
index 9c1f25b3..7aa4604d 100755
--- a/scripts/demo-check.sh
+++ b/scripts/demo-check.sh
@@ -357,6 +357,9 @@ contains mobile-uni/src/pages/user/learning/index.vue "getPracticePrepCard"
 contains frontend/src/views/recruit/interview.vue "建议复试"
 contains frontend/src/views/train/practice.vue "导师改写"
 contains frontend/src/views/knowledge/cases.vue "真实语音"
+contains frontend/src/views/knowledge/cases.vue "案例所属项目"
+contains frontend/src/views/knowledge/cases.vue "请先选择案例所属项目"
+contains backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrCaseService.java "系统用户上传案例必须明确所属项目"
 contains frontend/src/views/knowledge/sop.vue "训练题已生成"
 contains frontend/src/views/system/model/index.vue "调用优先级"
 contains frontend/src/views/system/model/index.vue "提示词模板"