feat(jpush): add vendor-specific message classification support for push notifications

- Add OPPO category/notify_level support (2024.11.20 regulation: category required when notify_level present)
- Add Honor importance field (NORMAL=service/LOW=marketing) for notification classification
- Add vivo category field (IM/ACCOUNT) for message scenario identification
- Set Xiaomi channel/template defaults in code (system=153609, chat=153608, templates P10761/M10289)
- Add classification option to JPush push payloads (0=operation, 1=system)
- Update xiaomi template keywords mapping to match actual template placeholders
- Add keyword search support for GetFollowers and GetFollowing endpoints
- Bind new config fields to environment variables for OPPO/Honor/vivo

configs/config.yaml

@@ -303,6 +303,13 @@ report:
 #     APP_JPUSH_CHANNEL_XIAOMI_MI_SYSTEM_TEMPLATE_ID, APP_JPUSH_CHANNEL_XIAOMI_MI_CHAT_TEMPLATE_ID
 #   OPPO 私信模板（可选，仅 OPPO，配置后下发私信时携带）:
 #     APP_JPUSH_CHANNEL_OPPO_SYSTEM_PRIVATE_TEMPLATE_ID, APP_JPUSH_CHANNEL_OPPO_CHAT_PRIVATE_TEMPLATE_ID
+#   OPPO 消息分类（2024.11.20 新规，category 必传时 notify_level 才生效）:
+#     APP_JPUSH_CHANNEL_OPPO_SYSTEM_CATEGORY, APP_JPUSH_CHANNEL_OPPO_CHAT_CATEGORY
+#     APP_JPUSH_CHANNEL_OPPO_SYSTEM_NOTIFY_LEVEL, APP_JPUSH_CHANNEL_OPPO_CHAT_NOTIFY_LEVEL
+#   荣耀通知栏消息智能分类（importance，NORMAL=服务通讯/LOW=资讯营销）:
+#     APP_JPUSH_CHANNEL_HONOR_SYSTEM_IMPORTANCE, APP_JPUSH_CHANNEL_HONOR_CHAT_IMPORTANCE
+#   vivo 厂商消息场景标识（category，classification=1 时必须为系统消息类）:
+#     APP_JPUSH_CHANNEL_VIVO_SYSTEM_CATEGORY, APP_JPUSH_CHANNEL_VIVO_CHAT_CATEGORY
 #   iOS 通知分组 thread-id:
 #     APP_JPUSH_CHANNEL_IOS_CHAT_THREAD_ID, APP_JPUSH_CHANNEL_IOS_SYSTEM_THREAD_ID
 jpush:
@@ -319,20 +326,25 @@ jpush:
     system: ""   # 系统消息/通知默认 channel_id
     chat: ""     # 私聊/群聊消息默认 channel_id
     vendor:
-      xiaomi:
-        system: ""
-        chat: ""
-        mi_system_template_id: ""   # 小米系统消息模板 id
-        mi_chat_template_id: ""     # 小米私聊消息模板 id
+      # xiaomi: 默认值已在代码内置（system=153609, chat=153608, mi_system_template_id=P10761, mi_chat_template_id=M10289）
+      #         不在此声明，由 config.go 的 viper.SetDefault 提供，环境变量可覆盖
+      xiaomi: {}
       huawei: { system: "", chat: "" }
+      # OPPO: category/notify_level 默认值已在代码内置（chat=IM/16, system=ACCOUNT/2），不在此声明
       oppo:
         system: ""
         chat: ""
-        oppo_system_private_template_id: ""  # OPPO 系统消息私信模板 id
-        oppo_chat_private_template_id: ""    # OPPO 私聊消息私信模板 id
-      vivo:   { system: "", chat: "" }
+        oppo_system_private_template_id: ""  # OPPO 系统消息私信模板 id（需厂商后台注册）
+        oppo_chat_private_template_id: ""    # OPPO 私聊消息私信模板 id（需厂商后台注册）
+      # vivo: category 默认值已在代码内置（chat=IM, system=ACCOUNT），不在此声明
+      vivo:
+        system: ""
+        chat: ""
       meizu:  { system: "", chat: "" }
-      honor:  { system: "", chat: "" }
+      # 荣耀: importance 默认值已在代码内置（chat=NORMAL, system=LOW），不在此声明
+      honor:
+        system: ""
+        chat: ""
       fcm:    { system: "", chat: "" }
     # iOS APNs 通知分组（按 thread-id 区分系统/私聊通知，不配置则不分组）
     ios: