fix(macos): show full config warning details

src/main/config-validation.test.ts

@@ -2,6 +2,7 @@ import test from 'node:test';
 import assert from 'node:assert/strict';
 import {
   buildConfigParseErrorDetails,
+  buildConfigWarningDialogDetails,
   buildConfigWarningNotificationBody,
   buildConfigWarningSummary,
   failStartupFromConfig,
@@ -53,6 +54,22 @@ test('buildConfigWarningNotificationBody includes concise warning details', () =
   );
 });
 
+test('buildConfigWarningDialogDetails includes full warning details', () => {
+  const details = buildConfigWarningDialogDetails('/tmp/config.jsonc', [
+    {
+      path: 'ankiConnect.pollingRate',
+      message: 'must be >= 50',
+      value: 10,
+      fallback: 250,
+    },
+  ]);
+
+  assert.match(details, /SubMiner detected config validation issues\./);
+  assert.match(details, /File: \/tmp\/config\.jsonc/);
+  assert.match(details, /1\. ankiConnect\.pollingRate: must be >= 50/);
+  assert.match(details, /actual=10 fallback=250/);
+});
+
 test('buildConfigParseErrorDetails includes path error and restart guidance', () => {
   const details = buildConfigParseErrorDetails('/tmp/config.jsonc', 'unexpected token at line 1');
 

src/main/config-validation.ts

@@ -61,6 +61,25 @@ export function buildConfigWarningNotificationBody(
   ].join('\n');
 }
 
+export function buildConfigWarningDialogDetails(
+  configPath: string,
+  warnings: ConfigValidationWarning[],
+): string {
+  const lines = warnings.map(
+    (warning, index) =>
+      `${index + 1}. ${warning.path}: ${warning.message} actual=${formatConfigValue(warning.value)} fallback=${formatConfigValue(warning.fallback)}`,
+  );
+
+  return [
+    'SubMiner detected config validation issues.',
+    `File: ${configPath}`,
+    '',
+    ...lines,
+    '',
+    'Defaults were applied where possible.',
+  ].join('\n');
+}
+
 export function buildConfigParseErrorDetails(configPath: string, parseError: string): string {
   return [
     'Failed to parse config file at:',

src/main/runtime/startup-config.test.ts

@@ -42,6 +42,12 @@ test('createReloadConfigHandler runs success flow with warnings', async () => {
     calls.some((entry) => entry.includes('notify:SubMiner:1 config validation issue(s) detected.')),
   );
   assert.ok(calls.some((entry) => entry.includes('1. ankiConnect.pollingRate: must be >= 50')));
+  assert.ok(
+    calls.some((entry) =>
+      entry.includes('dialog:SubMiner config validation warning:SubMiner detected config validation issues.'),
+    ),
+  );
+  assert.ok(calls.some((entry) => entry.includes('actual=10 fallback=250')));
   assert.ok(calls.includes('hotReload:start'));
   assert.deepEqual(refreshCalls, [{ force: true }]);
 });

src/main/runtime/startup-config.ts

@@ -1,5 +1,6 @@
 import type { ConfigValidationWarning } from '../../types';
 import {
+  buildConfigWarningDialogDetails,
   buildConfigParseErrorDetails,
   buildConfigWarningNotificationBody,
   buildConfigWarningSummary,
@@ -60,6 +61,12 @@ export function createReloadConfigHandler(deps: ReloadConfigRuntimeDeps): () =>
       deps.showDesktopNotification('SubMiner', {
         body: buildConfigWarningNotificationBody(result.path, result.warnings),
       });
+      if (process.platform === 'darwin') {
+        deps.failHandlers.showErrorBox(
+          'SubMiner config validation warning',
+          buildConfigWarningDialogDetails(result.path, result.warnings),
+        );
+      }
     }
 
     deps.startConfigHotReload();