feat: Introduce configurable docs link and remove hardcoded chat links

- Added a new GeneralSetting struct to manage configurable docs link
- Removed hardcoded ChatLink and ChatLink2 variables across multiple files
- Updated frontend components to dynamically render docs link from status
- Simplified chat and link-related logic in various components
- Added a warning modal for quota per unit setting in operation settings

common/constants.go

@@ -15,8 +15,9 @@ var SystemName = "New API"
 var Footer = ""
 var Logo = ""
 var TopUpLink = ""
-var ChatLink = ""
-var ChatLink2 = ""
+
+// var ChatLink = ""
+// var ChatLink2 = ""
 var QuotaPerUnit = 500 * 1000.0 // $0.002 / 1K tokens
 var DisplayInCurrencyEnabled = true
 var DisplayTokenStatEnabled = true