keep AI settings editor in sync with the config it just saved (#10503)

* fix: keep AI settings editor in sync with the config it just saved

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

* fix: skip the post-save reload and record why the saved config is cloned

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

frontend/src/lib/components/instanceSettings/InstanceAISettings.svelte

@@ -145,5 +145,8 @@
 		link="https://www.windmill.dev/docs/core_concepts/ai_generation"
 		promptScope="instance"
 		customSave={handleCustomSave}
+		onSave={(savedConfig) => {
+			initialConfig = savedConfig
+		}}
 	/>
 {/if}

frontend/src/lib/components/workspaceSettings/AISettings.svelte

@@ -57,7 +57,7 @@
 		usesInstanceAiConfig?: boolean
 		instanceAiSummary?: InstanceAISummary
 		customSave?: (config: AIConfig) => Promise<void>
-		onSave?: (info?: GetCopilotSettingsStateResponse) => void | Promise<void>
+		onSave?: (savedConfig: AIConfig, info?: GetCopilotSettingsStateResponse) => void | Promise<void>
 		title?: string
 		description?: string
 		link?: string
@@ -332,7 +332,14 @@
 			sendUserToast('AI settings updated')
 		}
 		storeInitialState()
-		await onSave?.(settingsState)
+		// Hand the parent what was persisted: it owns `initialConfig`, and this component is
+		// destroyed on a settings tab switch, so a stale prop returns as editor state on remount
+		// and is written back by the next save. Clone it, since `providers` aliases our `$state`
+		// and the `lastLoadedConfigKey` guard would then track our own edits; pre-arm that guard
+		// so the prop update does not re-apply the config over what the editor now shows.
+		const savedConfig = clone(config)
+		lastLoadedConfigKey = JSON.stringify(savedConfig)
+		await onSave?.(savedConfig, settingsState)
 	}
 
 	async function onAiProviderChange(provider: AIProvider) {

frontend/src/routes/(root)/(logged)/workspace_settings/+page.svelte

@@ -2029,7 +2029,8 @@ export async function main(
 								{hasInstanceAiConfig}
 								{usesInstanceAiConfig}
 								{instanceAiSummary}
-								onSave={(copilotSettingsState) => {
+								onSave={(savedConfig, copilotSettingsState) => {
+									aiInitialConfig = savedConfig
 									if (!copilotSettingsState) {
 										return
 									}