feat(ui): rework MySQL delivery workbench form and flow

Rebuild the MySQL standardized delivery form in Catalog.vue: sectioned layout (scope/resources/db config/advanced params), client-generated root password with regenerate/copy, storage slider, install/data path hints, inline field validation, delivery history and task polling.

Align CreateMySQLDeliveryPayload with the backend MySQLDeliveryInput contract (cpu_milli/memory_mi/storage_gi required, legacy fields optional, drop nonexistent param_template) and send mysql_root_password/mysql_admin_password as a pair so the credential shown to the user is the one actually deployed.

frontend/src/api/delivery.ts

@@ -26,25 +26,26 @@ export interface CreateMySQLDeliveryPayload {
   mysql_port?: number
   data_disk: string
   target_host?: string
-  cpu_cores: number
-  memory_gb: number
-  storage_gb: number
   cpu_milli: number
   memory_mi: number
   storage_gi: number
-  param_template: string
+  cpu_cores?: number
-  timezone: string
+  memory_gb?: number
-  lower_case_table_names: number
+  storage_gb?: number
-  character_set: string
+  timezone?: string
-  collation: string
+  lower_case_table_names?: number
-  max_connections: string | number
+  character_set?: string
-  innodb_redo_log_capacity: string
+  collation?: string
-  innodb_flush_log_at_trx_commit: number
+  max_connections?: string | number
-  sync_binlog: number
+  innodb_redo_log_capacity?: string
-  innodb_io_capacity: number
+  innodb_flush_log_at_trx_commit?: number
-  long_query_time: number
+  sync_binlog?: number
-  binlog_expire_logs_seconds: number
+  innodb_io_capacity?: number
-  max_binlog_size: string
+  long_query_time?: number
+  binlog_expire_logs_seconds?: number
+  max_binlog_size?: string
+  mysql_root_password?: string
+  mysql_admin_password?: string
 }
 
 export interface DeliveryTask {
@@ -83,6 +84,12 @@ export interface DeliveryTaskSnapshot {
   events: TaskEvent[]
 }
 
+export interface DeploymentCredential {
+  username: string
+  host: string
+  password: string
+}
+
 export interface MySQLServiceLedgerItem {
   name: string
   datacenter: string
@@ -172,6 +179,13 @@ export const deliveryApi = {
       method: 'POST',
     })
   },
+
+  async revealCredentials(taskId: string): Promise<DeploymentCredential[]> {
+    const data = await authRequest(`/auth/api/v1/delivery/tasks/${encodeURIComponent(taskId)}/credentials/reveal`, {
+      method: 'POST',
+    })
+    return Array.isArray(data.items) ? data.items : []
+  },
 }
 
 function createIdempotencyKey(payload: CreateMySQLDeliveryPayload) {