diff --git a/app/citizen-frontend/src/pages/self-assessment.vue b/app/citizen-frontend/src/pages/self-assessment.vue
index 68cf0a2..b1876f8 100644
--- a/app/citizen-frontend/src/pages/self-assessment.vue
+++ b/app/citizen-frontend/src/pages/self-assessment.vue
@@ -491,7 +491,7 @@
               variant="flat"
               @click="handleAppointment"
             >
-              {{ APPOINTMENT_ENABLED ? "立即預約" : "預約功能尚未開放" }}
+              {{ APPOINTMENT_ENABLED ? "立即預約" : "註冊會員" }}
             </v-btn>
           </div>
         </v-card-actions>
@@ -506,7 +506,7 @@
         to="/"
         variant="outlined"
       >
-        回首頁健康儀表板
+        回首頁
       </v-btn>
     </template>
   </Layout>
diff --git a/app/citizen-frontend/src/stores/app.ts b/app/citizen-frontend/src/stores/app.ts
index 5382525..a56fd3a 100644
--- a/app/citizen-frontend/src/stores/app.ts
+++ b/app/citizen-frontend/src/stores/app.ts
@@ -35,6 +35,7 @@ import {
   saveGuestSelfAssessmentDraft,
   type GuestSelfAssessmentDraft,
 } from "@/utils/guest-self-assessment";
+import { getApiErrorMessage, getApiErrorStatus } from "@/utils/api-error";
 import { calculateProvisionalRiskLevel } from "@/utils/self-assessment";
 
 /** 開發環境可用 VITE_USE_MOCK=true 模擬流程；正式串接時設為 false。 */
@@ -313,6 +314,8 @@ export const useAppStore = defineStore("app", () => {
   const userID = ref("");
   const userProfile = ref<UserProfile>(createEmptyUserProfile());
   const selfAssessment = ref<SelfAssessment>(createEmptySelfAssessment());
+  const selfAssessmentLoading = ref(false);
+  const selfAssessmentError = ref("");
   const appointments = ref<Appointment[]>(createDefaultAppointments());
   const measurements = ref<Record<string, MeasurementStation>>(
     createDefaultMeasurements(),
@@ -373,6 +376,12 @@ export const useAppStore = defineStore("app", () => {
           const profile = await apiGetProfile();
           isLoggedIn.value = true;
           userProfile.value = applyProfileToStore(profile);
+
+          try {
+            await loadLatestSelfAssessment();
+          } catch {
+            // 最近自評載入失敗不應使已驗證的登入 Session 失效。
+          }
         }
 
         return isLoggedIn.value;
@@ -405,6 +414,13 @@ export const useAppStore = defineStore("app", () => {
       : await apiLogin({ phone, password });
 
     setAuthenticated(response);
+
+    try {
+      await loadLatestSelfAssessment();
+    } catch {
+      // 最近自評載入失敗不應使已驗證的登入 Session 失效。
+    }
+
     return response;
   }
 
@@ -443,6 +459,8 @@ export const useAppStore = defineStore("app", () => {
     userID.value = "";
     userProfile.value = createEmptyUserProfile();
     selfAssessment.value = createEmptySelfAssessment();
+    selfAssessmentLoading.value = false;
+    selfAssessmentError.value = "";
   }
 
   /** 呼叫後端登出，無論請求結果都清除前端登入狀態。 */
@@ -510,9 +528,32 @@ export const useAppStore = defineStore("app", () => {
       return null;
     }
 
-    const assessment = await apiGetLatestSelfAssessment();
-    setSelfAssessment(assessment);
-    return assessment;
+    selfAssessmentLoading.value = true;
+    selfAssessmentError.value = "";
+
+    try {
+      const assessment = await apiGetLatestSelfAssessment();
+      setSelfAssessment(assessment);
+      return assessment;
+    } catch (error) {
+      const status = getApiErrorStatus(error);
+
+      if (status === 404) {
+        selfAssessment.value = createEmptySelfAssessment();
+        return null;
+      }
+
+      if (status !== 401) {
+        selfAssessmentError.value = getApiErrorMessage(
+          error,
+          "無法載入最近一次自評，請稍後再試。",
+        );
+      }
+
+      throw error;
+    } finally {
+      selfAssessmentLoading.value = false;
+    }
   }
 
   /**
@@ -631,6 +672,8 @@ export const useAppStore = defineStore("app", () => {
     userID,
     userProfile,
     selfAssessment,
+    selfAssessmentLoading,
+    selfAssessmentError,
     appointments,
     measurements,
     completedStationsCount,