Fix configSource in getAppConfigurationState to distinguish default fallback

The old code computed configSource before cache resolution, so when
neither a flag nor a cached config was set, the default shopify.app.toml
fallback was mislabeled as 'cached' instead of 'default'. Move the
source determination after resolution to match the three-way logic
already used by selectActiveConfig.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ryancbahan

packages/app/src/cli/models/app/loader.test.ts

@@ -2620,10 +2620,10 @@ describe('load', () => {
       cmd_app_all_configs_clients: JSON.stringify({'shopify.app.toml': '1234567890'}),
       cmd_app_linked_config_name: 'shopify.app.toml',
       cmd_app_linked_config_git_tracked: true,
-      cmd_app_linked_config_source: 'cached',
+      cmd_app_linked_config_source: 'default',
       cmd_app_warning_api_key_deprecation_displayed: false,
       app_extensions_any: false,
-      app_extensions_breakdown: {},
+      app_extensions_breakdown: JSON.stringify({}),
       app_extensions_count: 0,
       app_extensions_custom_layout: false,
       app_extensions_function_any: false,

packages/app/src/cli/models/app/loader.ts

@@ -906,7 +906,6 @@ export async function getAppConfigurationState(
   let configName = userProvidedConfigName
 
   const appDirectory = await getAppDirectory(workingDirectory)
-  const configSource: LinkedConfigurationSource = configName ? 'flag' : 'cached'
 
   const cachedCurrentConfigName = getCachedAppInfo(appDirectory)?.configFile
   const cachedCurrentConfigPath = cachedCurrentConfigName ? joinPath(appDirectory, cachedCurrentConfigName) : null
@@ -922,6 +921,16 @@ export async function getAppConfigurationState(
 
   configName = configName ?? cachedCurrentConfigName
 
+  // Determine source after resolution so it reflects the actual selection path
+  let configSource: LinkedConfigurationSource
+  if (userProvidedConfigName) {
+    configSource = 'flag'
+  } else if (configName) {
+    configSource = 'cached'
+  } else {
+    configSource = 'default'
+  }
+
   const {configurationPath, configurationFileName} = await getConfigurationPath(appDirectory, configName)
   const file = await loadConfigurationFileContent(configurationPath)