feat: add Discord pre-ack emoji support (#5609)

* Initial plan

* feat: add Discord pre-ack emoji support

Co-authored-by: Soulter <37870767+Soulter@users.noreply.github.com>

* feat: add Discord pre-acknowledgment emoji configuration in English and Chinese locales

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Soulter <37870767+Soulter@users.noreply.github.com>
Co-authored-by: Soulter <905617992@qq.com>

astrbot/core/config/default.py

@@ -3446,6 +3446,19 @@ CONFIG_METADATA_3 = {
                             "platform_specific.telegram.pre_ack_emoji.enable": True,
                         },
                     },
+                    "platform_specific.discord.pre_ack_emoji.enable": {
+                        "description": "[Discord] 启用预回应表情",
+                        "type": "bool",
+                    },
+                    "platform_specific.discord.pre_ack_emoji.emojis": {
+                        "description": "表情列表（Unicode 或自定义表情名）",
+                        "type": "list",
+                        "items": {"type": "string"},
+                        "hint": "填写 Unicode 表情符号，例如：👍、🤔、⏳",
+                        "condition": {
+                            "platform_specific.discord.pre_ack_emoji.enable": True,
+                        },
+                    },
                 },
             },
         },

astrbot/core/pipeline/preprocess_stage/stage.py

@@ -27,7 +27,7 @@ class PreProcessStage(Stage):
     ) -> None | AsyncGenerator[None, None]:
         """在处理事件之前的预处理"""
         # 平台特异配置：platform_specific.<platform>.pre_ack_emoji
-        supported = {"telegram", "lark"}
+        supported = {"telegram", "lark", "discord"}
         platform = event.get_platform_name()
         cfg = (
             self.config.get("platform_specific", {})

dashboard/src/i18n/locales/en-US/features/config-metadata.json

@@ -738,6 +738,17 @@
               "hint": "Telegram only supports a fixed reaction set, reference: [https://gist.github.com/Soulter/3f22c8e5f9c7e152e967e8bc28c97fc9](https://gist.github.com/Soulter/3f22c8e5f9c7e152e967e8bc28c97fc9)"
             }
           }
+        },
+        "discord": {
+          "pre_ack_emoji": {
+            "enable": {
+              "description": "[Discord] Enable Pre-acknowledgment Emoji"
+            },
+            "emojis": {
+              "description": "Emoji List (Unicode or Custom Emoji Name)",
+              "hint": "Enter Unicode emoji symbols, e.g., 👍, 🤔, ⏳"
+            }
+          }
         }
       }
     }

dashboard/src/i18n/locales/zh-CN/features/config-metadata.json

@@ -741,6 +741,17 @@
               "hint": "Telegram 仅支持固定反应集合,参考:[https://gist.github.com/Soulter/3f22c8e5f9c7e152e967e8bc28c97fc9](https://gist.github.com/Soulter/3f22c8e5f9c7e152e967e8bc28c97fc9)"
             }
           }
+        },
+        "discord": {
+          "pre_ack_emoji": {
+            "enable": {
+              "description": "[Discord] 启用预回应表情"
+            },
+            "emojis": {
+              "description": "表情列表（Unicode 或自定义表情名）",
+              "hint": "填写 Unicode 表情符号，例如：👍、🤔、⏳"
+            }
+          }
         }
       }
     }