fix(app): theme pull request empty state

The empty-state text inherited the platform default color, making it unreadable on dark surfaces. Use the app foreground tokens so it follows the active theme.

packages/app/src/panels/pull-request/index.tsx

@@ -1,6 +1,7 @@
 import { useCallback, useEffect } from "react";
 import { Text, View } from "react-native";
 import { useTranslation } from "react-i18next";
+import { StyleSheet } from "react-native-unistyles";
 import { buildWorkspaceAttachmentScopeKey } from "@/attachments/workspace-attachments-store";
 import { useToast } from "@/contexts/toast-context";
 import { useCheckoutGitActionsStore } from "@/git/actions-store";
@@ -75,9 +76,9 @@ export function PullRequestContent(input: {
     return <PullRequestPaneSkeleton />;
   }
   return (
-    <View style={EMPTY_STYLE} testID="pull-request-empty-state">
-      <Text style={EMPTY_TITLE_STYLE}>{t("panels.pullRequest.emptyTitle")}</Text>
-      <Text>{t("panels.pullRequest.emptyDescription")}</Text>
+    <View style={styles.empty} testID="pull-request-empty-state">
+      <Text style={styles.emptyTitle}>{t("panels.pullRequest.emptyTitle")}</Text>
+      <Text style={styles.emptyDescription}>{t("panels.pullRequest.emptyDescription")}</Text>
     </View>
   );
 }
@@ -91,12 +92,18 @@ export function usePullRequestData(input: {
   return usePrPaneData(input);
 }
 
-const EMPTY_STYLE = {
-  flex: 1,
-  alignItems: "center",
-  justifyContent: "center",
-  gap: 8,
-  padding: 24,
-} as const;
-
-const EMPTY_TITLE_STYLE = { fontWeight: "600" } as const;
+const styles = StyleSheet.create((theme) => ({
+  empty: {
+    flex: 1,
+    alignItems: "center",
+    justifyContent: "center",
+    gap: 8,
+    padding: 24,
+  },
+  emptyTitle: {
+    color: theme.colors.foreground,
+  },
+  emptyDescription: {
+    color: theme.colors.foregroundMuted,
+  },
+}));