feat: 添加目标体重设置功能

- UserConfig 模型添加 target_weight 字段
- 新增 POST /api/config 端点用于更新用户配置
- 设置页面添加目标体重输入框及目标 BMI 自动计算
- BMI 分析使用用户设置的目标体重计算达成预估
- 修复测试 fixture 的 save_config 参数问题

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/vitals/core/database.py

@@ -287,10 +287,13 @@ def get_exercises(start_date: Optional[date] = None, end_date: Optional[date] =
         ]
 
 
-def delete_exercise(exercise_id: int):
+def delete_exercise(exercise_id: int, user_id: int = None):
-    """删除运动记录"""
+    """删除运动记录（需验证 user_id）"""
     with get_connection() as (conn, cursor):
-        cursor.execute("DELETE FROM exercise WHERE id = %s", (exercise_id,))
+        if user_id:
+            cursor.execute("DELETE FROM exercise WHERE id = %s AND user_id = %s", (exercise_id, user_id))
+        else:
+            cursor.execute("DELETE FROM exercise WHERE id = %s", (exercise_id,))
 
 
 # ===== 步数记录 =====
@@ -420,10 +423,13 @@ def get_meals(start_date: Optional[date] = None, end_date: Optional[date] = None
         ]
 
 
-def delete_meal(meal_id: int):
+def delete_meal(meal_id: int, user_id: int = None):
-    """删除饮食记录"""
+    """删除饮食记录（需验证 user_id）"""
     with get_connection() as (conn, cursor):
-        cursor.execute("DELETE FROM meal WHERE id = %s", (meal_id,))
+        if user_id:
+            cursor.execute("DELETE FROM meal WHERE id = %s AND user_id = %s", (meal_id, user_id))
+        else:
+            cursor.execute("DELETE FROM meal WHERE id = %s", (meal_id,))
 
 
 # ===== 睡眠记录 =====
@@ -483,10 +489,13 @@ def get_sleep_records(start_date: Optional[date] = None, end_date: Optional[date
         ]
 
 
-def delete_sleep(sleep_id: int):
+def delete_sleep(sleep_id: int, user_id: int = None):
-    """删除睡眠记录"""
+    """删除睡眠记录（需验证 user_id）"""
     with get_connection() as (conn, cursor):
-        cursor.execute("DELETE FROM sleep WHERE id = %s", (sleep_id,))
+        if user_id:
+            cursor.execute("DELETE FROM sleep WHERE id = %s AND user_id = %s", (sleep_id, user_id))
+        else:
+            cursor.execute("DELETE FROM sleep WHERE id = %s", (sleep_id,))
 
 
 # ===== 体重记录 =====
@@ -546,10 +555,13 @@ def get_latest_weight() -> Optional[Weight]:
     return records[0] if records else None
 
 
-def delete_weight(weight_id: int):
+def delete_weight(weight_id: int, user_id: int = None):
-    """删除体重记录"""
+    """删除体重记录（需验证 user_id）"""
     with get_connection() as (conn, cursor):
-        cursor.execute("DELETE FROM weight WHERE id = %s", (weight_id,))
+        if user_id:
+            cursor.execute("DELETE FROM weight WHERE id = %s AND user_id = %s", (weight_id, user_id))
+        else:
+            cursor.execute("DELETE FROM weight WHERE id = %s", (weight_id,))
 
 
 # ===== 用户配置 =====
@@ -590,6 +602,7 @@ def get_config(user_id: int = 1) -> UserConfig:
             weight=float(config_dict["weight"]) if config_dict.get("weight") else None,
             activity_level=config_dict.get("activity_level", "moderate"),
             goal=config_dict.get("goal", "maintain"),
+            target_weight=float(config_dict["target_weight"]) if config_dict.get("target_weight") else None,
         )
 
 
@@ -603,6 +616,7 @@ def save_config(user_id: int, config: UserConfig):
             "weight": str(config.weight) if config.weight else None,
             "activity_level": config.activity_level,
             "goal": config.goal,
+            "target_weight": str(config.target_weight) if config.target_weight else None,
         }
 
         for key, value in config_dict.items():
@@ -921,10 +935,13 @@ def get_readings(
         ]
 
 
-def get_reading(reading_id: int) -> Optional[Reading]:
+def get_reading(reading_id: int, user_id: int = None) -> Optional[Reading]:
-    """获取单条阅读记录"""
+    """获取单条阅读记录（可选验证 user_id）"""
     with get_connection() as (conn, cursor):
-        cursor.execute("SELECT * FROM reading WHERE id = %s", (reading_id,))
+        if user_id:
+            cursor.execute("SELECT * FROM reading WHERE id = %s AND user_id = %s", (reading_id, user_id))
+        else:
+            cursor.execute("SELECT * FROM reading WHERE id = %s", (reading_id,))
         row = cursor.fetchone()
         if row:
             return Reading(
@@ -941,10 +958,13 @@ def get_reading(reading_id: int) -> Optional[Reading]:
         return None
 
 
-def delete_reading(reading_id: int):
+def delete_reading(reading_id: int, user_id: int = None):
-    """删除阅读记录"""
+    """删除阅读记录（需验证 user_id）"""
     with get_connection() as (conn, cursor):
-        cursor.execute("DELETE FROM reading WHERE id = %s", (reading_id,))
+        if user_id:
+            cursor.execute("DELETE FROM reading WHERE id = %s AND user_id = %s", (reading_id, user_id))
+        else:
+            cursor.execute("DELETE FROM reading WHERE id = %s", (reading_id,))
 
 
 def get_reading_stats(user_id: int = 1, days: int = 30) -> dict:

src/vitals/core/models.py

@@ -160,6 +160,7 @@ class UserConfig:
     weight: Optional[float] = None  # 公斤
     activity_level: str = ActivityLevel.MODERATE.value
     goal: str = Goal.MAINTAIN.value
+    target_weight: Optional[float] = None  # 目标体重（公斤）
 
     @property
     def bmr(self) -> Optional[int]:
@@ -193,6 +194,7 @@ class UserConfig:
             "weight": self.weight,
             "activity_level": self.activity_level,
             "goal": self.goal,
+            "target_weight": self.target_weight,
             "bmr": self.bmr,
             "tdee": self.tdee,
         }

src/vitals/web/app.py

@@ -160,10 +160,21 @@ class ConfigResponse(BaseModel):
     weight: Optional[float]
     activity_level: str
     goal: str
+    target_weight: Optional[float] = None
     bmr: Optional[int]
     tdee: Optional[int]
 
 
+class ConfigUpdateRequest(BaseModel):
+    age: Optional[int] = None
+    gender: Optional[str] = None
+    height: Optional[float] = None
+    weight: Optional[float] = None
+    activity_level: Optional[str] = None
+    goal: Optional[str] = None
+    target_weight: Optional[float] = None
+
+
 class TodaySummary(BaseModel):
     date: str
     calories_intake: int
@@ -915,11 +926,49 @@ async def get_config():
         weight=config.weight,
         activity_level=config.activity_level,
         goal=config.goal,
+        target_weight=config.target_weight,
         bmr=config.bmr,
         tdee=config.tdee,
     )
 
 
+@app.post("/api/config", response_model=ConfigResponse)
+async def update_config(request: ConfigUpdateRequest):
+    """更新用户配置"""
+    from ..core.models import UserConfig
+
+    active_user = db.get_active_user()
+    user_id = active_user.id if active_user else 1
+
+    # 获取当前配置
+    current_config = db.get_config(user_id)
+
+    # 更新配置（仅更新提供的字段）
+    new_config = UserConfig(
+        age=request.age if request.age is not None else current_config.age,
+        gender=request.gender if request.gender is not None else current_config.gender,
+        height=request.height if request.height is not None else current_config.height,
+        weight=request.weight if request.weight is not None else current_config.weight,
+        activity_level=request.activity_level if request.activity_level is not None else current_config.activity_level,
+        goal=request.goal if request.goal is not None else current_config.goal,
+        target_weight=request.target_weight if request.target_weight is not None else current_config.target_weight,
+    )
+
+    db.save_config(user_id, new_config)
+
+    return ConfigResponse(
+        age=new_config.age,
+        gender=new_config.gender,
+        height=new_config.height,
+        weight=new_config.weight,
+        activity_level=new_config.activity_level,
+        goal=new_config.goal,
+        target_weight=new_config.target_weight,
+        bmr=new_config.bmr,
+        tdee=new_config.tdee,
+    )
+
+
 @app.get("/api/today", response_model=TodaySummary)
 async def get_today_summary():
     """获取今日概览"""
@@ -8806,6 +8855,21 @@ def get_settings_page_html() -> str:
                     </div>
                 </div>
 
+                <div class="form-row">
+                    <div class="form-group">
+                        <label for="profile-target-weight">目标体重 (kg)</label>
+                        <input type="number" id="profile-target-weight" name="target_weight" min="30" max="300" step="0.1" placeholder="设置目标体重">
+                        <p style="font-size: 0.85rem; color: #94A3B8; margin-top: 4px;">用于计算达成目标所需时间</p>
+                    </div>
+                    <div class="form-group">
+                        <label>目标 BMI (自动计算)</label>
+                        <div class="bmi-display">
+                            <span id="target-bmi-value">--</span>
+                            <span id="target-bmi-status" class="bmi-status"></span>
+                        </div>
+                    </div>
+                </div>
+
                 <div style="margin-top: 20px;">
                     <button type="submit" class="btn btn-primary">保存个人信息</button>
                 </div>
@@ -9099,6 +9163,45 @@ def get_settings_page_html() -> str:
                 bmiStatus.textContent = '';
                 bmiStatus.className = 'bmi-status';
             }
+
+            // 计算目标 BMI
+            calculateTargetBMI();
+        }
+
+        // 计算目标 BMI
+        function calculateTargetBMI() {
+            const height = parseFloat(document.getElementById('profile-height').value);
+            const targetWeight = parseFloat(document.getElementById('profile-target-weight').value);
+            const targetBmiValue = document.getElementById('target-bmi-value');
+            const targetBmiStatus = document.getElementById('target-bmi-status');
+
+            if (height && targetWeight && height > 0) {
+                const heightM = height / 100;
+                const bmi = targetWeight / (heightM * heightM);
+                targetBmiValue.textContent = bmi.toFixed(1);
+
+                let status = '';
+                let statusClass = '';
+                if (bmi < 18.5) {
+                    status = '偏瘦';
+                    statusClass = 'underweight';
+                } else if (bmi < 24) {
+                    status = '正常';
+                    statusClass = 'normal';
+                } else if (bmi < 28) {
+                    status = '偏胖';
+                    statusClass = 'overweight';
+                } else {
+                    status = '肥胖';
+                    statusClass = 'obese';
+                }
+                targetBmiStatus.textContent = status;
+                targetBmiStatus.className = 'bmi-status ' + statusClass;
+            } else {
+                targetBmiValue.textContent = '--';
+                targetBmiStatus.textContent = '';
+                targetBmiStatus.className = 'bmi-status';
+            }
         }
 
         // 加载个人信息
@@ -9115,6 +9218,15 @@ def get_settings_page_html() -> str:
                     document.getElementById('profile-height').value = user.height_cm || '';
                     document.getElementById('profile-weight').value = user.weight_kg || '';
 
+                    // 加载目标体重
+                    const configResponse = await fetch('/api/config');
+                    if (configResponse.ok) {
+                        const config = await configResponse.json();
+                        if (config.target_weight) {
+                            document.getElementById('profile-target-weight').value = config.target_weight;
+                        }
+                    }
+
                     calculateBMI();
                 }
             } catch (error) {
@@ -9135,6 +9247,7 @@ def get_settings_page_html() -> str:
             const age = document.getElementById('profile-age').value ? parseInt(document.getElementById('profile-age').value) : null;
             const height_cm = document.getElementById('profile-height').value ? parseFloat(document.getElementById('profile-height').value) : null;
             const weight_kg = document.getElementById('profile-weight').value ? parseFloat(document.getElementById('profile-weight').value) : null;
+            const target_weight = document.getElementById('profile-target-weight').value ? parseFloat(document.getElementById('profile-target-weight').value) : null;
 
             if (!name) {
                 showAlert('姓名不能为空', 'error');
@@ -9142,12 +9255,22 @@ def get_settings_page_html() -> str:
             }
 
             try {
+                // 保存用户基本信息
                 const response = await fetch(`/api/users/${activeUser.id}`, {
                     method: 'PUT',
                     headers: { 'Content-Type': 'application/json' },
                     body: JSON.stringify({ name, gender, height_cm, weight_kg, age })
                 });
 
+                // 保存目标体重到配置
+                if (target_weight !== null) {
+                    await fetch('/api/config', {
+                        method: 'POST',
+                        headers: { 'Content-Type': 'application/json' },
+                        body: JSON.stringify({ target_weight })
+                    });
+                }
+
                 if (response.ok) {
                     showAlert('个人信息已保存', 'success');
                     loadProfile();
@@ -9683,6 +9806,7 @@ def get_settings_page_html() -> str:
             // BMI 实时计算
             document.getElementById('profile-height').addEventListener('input', calculateBMI);
             document.getElementById('profile-weight').addEventListener('input', calculateBMI);
+            document.getElementById('profile-target-weight').addEventListener('input', calculateTargetBMI);
         });
 
         // 移动端更多菜单

tests/test_web.py

@@ -49,7 +49,7 @@ def populated_db():
         age=28, gender="male", height=175.0, weight=72.0,
         activity_level="moderate", goal="maintain",
     )
-    db.save_config(config)
+    db.save_config(1, config)
 
     # 今日数据
     db.add_exercise(Exercise(
@@ -111,6 +111,19 @@ class TestConfigEndpoint:
         data = response.json()
         assert data["activity_level"] == "moderate"
 
+    def test_update_config_target_weight(self, client, populated_db):
+        """测试更新目标体重"""
+        response = client.post("/api/config", json={"target_weight": 65.0})
+        assert response.status_code == 200
+
+        data = response.json()
+        assert data["target_weight"] == 65.0
+
+        # 验证可以获取到保存的值
+        get_response = client.get("/api/config")
+        get_data = get_response.json()
+        assert get_data["target_weight"] == 65.0
+
 
 class TestTodayEndpoint:
     """今日概览接口测试"""