diff --git a/apps/miniprogram/src/app.config.ts b/apps/miniprogram/src/app.config.ts
index 792171a..0c8b797 100644
--- a/apps/miniprogram/src/app.config.ts
+++ b/apps/miniprogram/src/app.config.ts
@@ -74,7 +74,7 @@ export default defineAppConfig({
     list: [
       { pagePath: 'pages/index/index', text: '首页', iconPath: 'assets/tabbar/home.png', selectedIconPath: 'assets/tabbar/home-active.png' },
       { pagePath: 'pages/health/index', text: '健康', iconPath: 'assets/tabbar/health.png', selectedIconPath: 'assets/tabbar/health-active.png' },
-      { pagePath: 'pages/messages/index', text: '消息', iconPath: 'assets/tabbar/message.png', selectedIconPath: 'assets/tabbar/message-active.png' },
+      { pagePath: 'pages/messages/index', text: '助手', iconPath: 'assets/tabbar/message.png', selectedIconPath: 'assets/tabbar/message-active.png' },
       { pagePath: 'pages/profile/index', text: '我的', iconPath: 'assets/tabbar/profile.png', selectedIconPath: 'assets/tabbar/profile-active.png' },
     ],
   },
diff --git a/apps/miniprogram/src/components/ui/DoctorTabBar/index.scss b/apps/miniprogram/src/components/ui/DoctorTabBar/index.scss
index e8af20b..dd15f7a 100644
--- a/apps/miniprogram/src/components/ui/DoctorTabBar/index.scss
+++ b/apps/miniprogram/src/components/ui/DoctorTabBar/index.scss
@@ -44,7 +44,7 @@
   }
 
   &__label {
-    font-size: 10px;
+    font-size: var(--tk-font-micro);
     color: $tx3;
     line-height: 1.2;
     transition: color 0.15s ease;
diff --git a/apps/miniprogram/src/components/ui/ShortcutButton/index.scss b/apps/miniprogram/src/components/ui/ShortcutButton/index.scss
index f09b446..8b08bad 100644
--- a/apps/miniprogram/src/components/ui/ShortcutButton/index.scss
+++ b/apps/miniprogram/src/components/ui/ShortcutButton/index.scss
@@ -37,14 +37,14 @@
     text-align: center;
     background: $dan;
     color: $white;
-    font-size: 11px;
+    font-size: var(--tk-font-micro);
     font-weight: 700;
     border-radius: $r-pill;
     padding: 0 4px;
   }
 
   &__label {
-    font-size: 12px;
+    font-size: var(--tk-font-cap);
     color: $tx2;
   }
 
diff --git a/apps/miniprogram/src/components/ui/TodoAlert/index.scss b/apps/miniprogram/src/components/ui/TodoAlert/index.scss
index 8b938d5..530578b 100644
--- a/apps/miniprogram/src/components/ui/TodoAlert/index.scss
+++ b/apps/miniprogram/src/components/ui/TodoAlert/index.scss
@@ -44,7 +44,7 @@
 
   &__subtitle {
     display: block;
-    font-size: 12px;
+    font-size: var(--tk-font-cap);
     color: $tx3;
     margin-top: 2px;
     overflow: hidden;
diff --git a/apps/miniprogram/src/pages/appointment/create/index.scss b/apps/miniprogram/src/pages/appointment/create/index.scss
index 0fca6cf..48707b5 100644
--- a/apps/miniprogram/src/pages/appointment/create/index.scss
+++ b/apps/miniprogram/src/pages/appointment/create/index.scss
@@ -308,7 +308,7 @@
   gap: var(--tk-gap-md);
   padding: var(--tk-section-gap) var(--tk-gap-lg);
   padding-bottom: constant(safe-area-inset-bottom);
-  padding-bottom: env(safe-area-inset-bottom);
+  padding-bottom: calc(var(--tk-page-padding) + env(safe-area-inset-bottom, 0px));
   background: $card;
   box-shadow: $shadow-md;
 }
diff --git a/apps/miniprogram/src/pages/appointment/detail/index.scss b/apps/miniprogram/src/pages/appointment/detail/index.scss
index 2ef62a6..2e9e00a 100644
--- a/apps/miniprogram/src/pages/appointment/detail/index.scss
+++ b/apps/miniprogram/src/pages/appointment/detail/index.scss
@@ -153,7 +153,7 @@
   right: 0;
   padding: var(--tk-section-gap) var(--tk-gap-lg);
   padding-bottom: constant(safe-area-inset-bottom);
-  padding-bottom: env(safe-area-inset-bottom);
+  padding-bottom: calc(var(--tk-page-padding) + env(safe-area-inset-bottom, 0px));
   background: $card;
   box-shadow: $shadow-md;
 }
diff --git a/apps/miniprogram/src/pages/health/index.scss b/apps/miniprogram/src/pages/health/index.scss
index 557d053..01b12e1 100644
--- a/apps/miniprogram/src/pages/health/index.scss
+++ b/apps/miniprogram/src/pages/health/index.scss
@@ -341,7 +341,8 @@
 }
 
 .ai-feedback-btn {
-  height: 32px;
+  height: 44px;
+  min-height: 44px;
   border-radius: $r-xs;
   @include flex-center;
   padding: 0 var(--tk-gap-sm);
diff --git a/apps/miniprogram/src/pages/login/index.scss b/apps/miniprogram/src/pages/login/index.scss
index 46f9679..102da3f 100644
--- a/apps/miniprogram/src/pages/login/index.scss
+++ b/apps/miniprogram/src/pages/login/index.scss
@@ -189,6 +189,17 @@
   @include flex-center;
   flex-shrink: 0;
   margin-top: 1px;
+  position: relative;
+
+  // 扩大点击区域至 44x44（24px 视觉 + 10px 每侧 padding via 伪元素）
+  &::before {
+    content: '';
+    position: absolute;
+    top: -10px;
+    right: -10px;
+    bottom: -10px;
+    left: -10px;
+  }
 
   &.checked {
     background: var(--tk-pri);
diff --git a/apps/miniprogram/src/pages/mall/index.scss b/apps/miniprogram/src/pages/mall/index.scss
index ba95e76..37987c4 100644
--- a/apps/miniprogram/src/pages/mall/index.scss
+++ b/apps/miniprogram/src/pages/mall/index.scss
@@ -308,7 +308,7 @@
   position: absolute;
   top: 8px;
   left: 8px;
-  font-size: 10px;
+  font-size: var(--tk-font-micro);
   font-weight: 600;
   padding: 2px 8px;
   border-radius: 6px;
diff --git a/apps/miniprogram/src/pages/messages/index.scss b/apps/miniprogram/src/pages/messages/index.scss
index c6a248e..d617f99 100644
--- a/apps/miniprogram/src/pages/messages/index.scss
+++ b/apps/miniprogram/src/pages/messages/index.scss
@@ -252,7 +252,7 @@
   align-items: center;
   gap: 10px;
   padding: 10px 16px;
-  padding-bottom: calc(10px + env(safe-area-inset-bottom));
+  padding-bottom: calc(var(--tk-tabbar-space) + env(safe-area-inset-bottom, 0px));
   background: $card;
   border-top: 1px solid $bd-l;
   flex-shrink: 0;
@@ -275,9 +275,9 @@
 }
 
 .ai-chat-bar__send {
-  width: 40px;
-  height: 40px;
-  border-radius: 20px;
+  width: 44px;
+  height: 44px;
+  border-radius: 22px;
   background: $pri;
   display: flex;
   align-items: center;
diff --git a/apps/miniprogram/src/pages/pkg-consultation/detail/index.scss b/apps/miniprogram/src/pages/pkg-consultation/detail/index.scss
index bd9d6bd..f7d6af5 100644
--- a/apps/miniprogram/src/pages/pkg-consultation/detail/index.scss
+++ b/apps/miniprogram/src/pages/pkg-consultation/detail/index.scss
@@ -197,7 +197,7 @@
   align-items: center;
   gap: 10px;
   padding: 10px 16px;
-  padding-bottom: calc(10px + env(safe-area-inset-bottom));
+  padding-bottom: calc(var(--tk-page-padding) + env(safe-area-inset-bottom, 0px));
   background: $card;
   border-top: 1px solid $bd-l;
   flex-shrink: 0;
diff --git a/apps/miniprogram/src/pages/pkg-doctor-core/consultation/detail/index.scss b/apps/miniprogram/src/pages/pkg-doctor-core/consultation/detail/index.scss
index 9d8df0c..0ea5618 100644
--- a/apps/miniprogram/src/pages/pkg-doctor-core/consultation/detail/index.scss
+++ b/apps/miniprogram/src/pages/pkg-doctor-core/consultation/detail/index.scss
@@ -117,7 +117,7 @@
   padding: var(--tk-gap-md) var(--tk-gap-lg);
   background: $card;
   border-top: 1px solid $bd;
-  padding-bottom: calc(16px + env(safe-area-inset-bottom));
+  padding-bottom: calc(var(--tk-page-padding) + env(safe-area-inset-bottom, 0px));
 }
 
 .chat-input {
diff --git a/apps/miniprogram/src/pages/pkg-mall/orders/index.scss b/apps/miniprogram/src/pages/pkg-mall/orders/index.scss
index d182bdb..df1c4f7 100644
--- a/apps/miniprogram/src/pages/pkg-mall/orders/index.scss
+++ b/apps/miniprogram/src/pages/pkg-mall/orders/index.scss
@@ -4,7 +4,7 @@
 // 订单列表 — 对齐原型 docs/design/mp-10-mall-pkg.html → 屏幕3
 
 .orders-page {
-  padding-bottom: env(safe-area-inset-bottom);
+  padding-bottom: calc(var(--tk-page-padding) + env(safe-area-inset-bottom, 0px));
 }
 
 // 状态筛选 Tab
diff --git a/apps/miniprogram/src/services/ai-chat.ts b/apps/miniprogram/src/services/ai-chat.ts
index 11ba8f4..6408813 100644
--- a/apps/miniprogram/src/services/ai-chat.ts
+++ b/apps/miniprogram/src/services/ai-chat.ts
@@ -1,4 +1,5 @@
 import { api } from './request';
+import { secureGet, secureSet } from '@/utils/secure-storage';
 
 export interface AiChatMessage {
   id: string;
@@ -74,10 +75,10 @@ export async function closeSession(sessionId: string): Promise<void> {
   await api.post(`/ai/chat/sessions/${sessionId}/close`, {});
 }
 
-/** 获取聊天历史（本地缓存） */
+/** 获取聊天历史（本地加密缓存） */
 export function getLocalHistory(): AiChatMessage[] {
   try {
-    const raw = wx.getStorageSync('ai_chat_history');
+    const raw = secureGet('ai_chat_history');
     return raw ? JSON.parse(raw) : [];
   } catch (err) {
     console.warn('[ai-chat] 读取本地聊天历史失败:', err);
@@ -85,9 +86,9 @@ export function getLocalHistory(): AiChatMessage[] {
   }
 }
 
-/** 保存聊天历史到本地 */
+/** 保存聊天历史到本地（加密存储） */
 export function saveLocalHistory(messages: AiChatMessage[]): void {
   try {
-    wx.setStorageSync('ai_chat_history', JSON.stringify(messages.slice(-100)));
+    secureSet('ai_chat_history', JSON.stringify(messages.slice(-100)));
   } catch (err) { console.warn('[ai-chat] 保存本地聊天历史失败:', err); }
 }
diff --git a/apps/miniprogram/src/stores/auth.ts b/apps/miniprogram/src/stores/auth.ts
index 37ac420..09f9d8b 100644
--- a/apps/miniprogram/src/stores/auth.ts
+++ b/apps/miniprogram/src/stores/auth.ts
@@ -93,11 +93,8 @@ export const useAuthStore = create<AuthState>((set, get) => ({
       }
     } catch { /* secure storage 不可用时保持默认值 */ }
     try {
-      let patientRaw = Taro.getStorageSync('current_patient');
-      // 防御双重序列化：如果 Storage 写入了 JSON 字符串而非对象，尝试解析
-      if (typeof patientRaw === 'string') {
-        try { patientRaw = JSON.parse(patientRaw); } catch { patientRaw = null; }
-      }
+      const patientStr = secureGet('current_patient');
+      let patientRaw = patientStr ? JSON.parse(patientStr) : null;
       const patientJson = patientRaw ? JSON.stringify(patientRaw) : '';
       if (patientJson !== cachedPatientJson) {
         cachedPatientJson = patientJson;
@@ -227,8 +224,8 @@ export const useAuthStore = create<AuthState>((set, get) => ({
   },
 
   setCurrentPatient: (patient) => {
-    Taro.setStorageSync('current_patient_id', patient.id);
-    Taro.setStorageSync('current_patient', patient);
+    secureSet('current_patient_id', patient.id);
+    secureSet('current_patient', JSON.stringify(patient));
     setCachedPatientId(patient.id);
     clearRequestCache();
     set({ currentPatient: patient });
@@ -264,11 +261,11 @@ export const useAuthStore = create<AuthState>((set, get) => ({
     secureRemove('user_roles');
     secureRemove('tenant_id');
     secureRemove('wechat_openid');
-    Taro.removeStorageSync('current_patient');
-    Taro.removeStorageSync('current_patient_id');
-    Taro.removeStorageSync('analytics_queue');
-    Taro.removeStorageSync('edit_patient');
-    Taro.removeStorageSync('ai_chat_history');
+    secureRemove('current_patient');
+    secureRemove('current_patient_id');
+    secureRemove('analytics_queue');
+    secureRemove('edit_patient');
+    secureRemove('ai_chat_history');
     // 清理 BLE DataBuffer 缓存（key 格式：ble_buffer_{patientId}_{bucket}）
     const storageInfo = Taro.getStorageInfoSync();
     storageInfo.keys.forEach((key) => {
diff --git a/apps/miniprogram/src/styles/mixins.scss b/apps/miniprogram/src/styles/mixins.scss
index bc337b5..0133f40 100644
--- a/apps/miniprogram/src/styles/mixins.scss
+++ b/apps/miniprogram/src/styles/mixins.scss
@@ -16,7 +16,15 @@
 
 @mixin safe-bottom {
   padding-bottom: constant(safe-area-inset-bottom);
-  padding-bottom: env(safe-area-inset-bottom);
+  padding-bottom: env(safe-area-inset-bottom, 0px);
+}
+
+@mixin safe-bottom-padded {
+  padding-bottom: calc(var(--tk-page-padding) + env(safe-area-inset-bottom, 0px));
+}
+
+@mixin safe-bottom-tabbar {
+  padding-bottom: calc(var(--tk-tabbar-space) + env(safe-area-inset-bottom, 0px));
 }
 
 @mixin serif-number {