feat(pp-calculator): support other pp calculators (#57)

New configurations:

- CALCULATOR="rosu": specific pp calculator
- CALCULATOR_CONFIG='{}': argument passed through into calculator

app/config.py

@@ -103,6 +103,23 @@ STORAGE_SETTINGS='{
   "s3_public_url_base": "https://your-custom-domain.com"
 }'
 ```
+""",
+                "表现计算设置": """配置表现分计算器及其参数。
+
+### rosu-pp-py (默认)
+
+```bash
+CALCULATOR="rosu"
+CALCULATOR_CONFIG='{}'
+```
+
+### [osu-performance-server](https://github.com/GooGuTeam/osu-performance-server)
+
+```bash
+CALCULATOR="performance_server"
+CALCULATOR_CONFIG='{
+    "server_url": "http://localhost:5225"
+}'
 """,
             }
         },
@@ -486,6 +503,21 @@ STORAGE_SETTINGS='{
         "游戏设置",
     ]
 
+    # 表现计算设置
+    calculator: Annotated[
+        Literal["rosu", "performance_server"],
+        Field(default="rosu", description="表现分计算器"),
+        "表现计算设置",
+    ]
+    calculator_config: Annotated[
+        dict[str, Any],
+        Field(
+            default={},
+            description="表现分计算器配置 (JSON 格式)，具体配置项请参考上方",
+        ),
+        "表现计算设置",
+    ]
+
     # 谱面缓存设置
     enable_beatmap_preload: Annotated[
         bool,
@@ -612,7 +644,7 @@ STORAGE_SETTINGS='{
     # 反作弊设置
     suspicious_score_check: Annotated[
         bool,
-        Field(default=True, description="启用可疑分数检查（star>25&acc<80 或 pp>3000）"),
+        Field(default=True, description="启用可疑分数检查（pp>3000）"),
         "反作弊设置",
     ]
     banned_name: Annotated[