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

controller/misc.go

@@ -54,8 +54,7 @@ func GetStatus(c *gin.Context) {
 			"turnstile_check":          common.TurnstileCheckEnabled,
 			"turnstile_site_key":       common.TurnstileSiteKey,
 			"top_up_link":              common.TopUpLink,
-			"chat_link":                common.ChatLink,
-			"chat_link2":               common.ChatLink2,
+			"docs_link":                operation_setting.GetGeneralSetting().DocsLink,
 			"quota_per_unit":           common.QuotaPerUnit,
 			"display_in_currency":      common.DisplayInCurrencyEnabled,
 			"enable_batch_update":      common.BatchUpdateEnabled,