Fix ShareExtension "Open Marks first" + add widget + BookmarkListRow polish

- Save serverConfig to App Group on every app launch so ShareExtension
  can always find credentials without requiring a disconnect/reconnect flow
- Add MarksWidget target with RandomBookmarkWidget (random saved bookmark,
  reloads hourly) using file-based App Group storage to avoid CFPreferences issues
- Extract BookmarkListRow as shared component with editorial typography tweaks
  (17pt semibold title, 13pt domain, relative date, 32×32 favicon, italic AI summary,
  20pt podcast icon, 16pt horizontal insets)
- Add MarksWidget and ShareExtension Xcode schemes for direct run/debug

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

project.yml

@@ -21,6 +21,7 @@ schemes:
       targets:
         Marks: all
         ShareExtension: all
+        MarksWidget: all
     run:
       config: Debug
     test:
@@ -32,12 +33,37 @@ schemes:
     archive:
       config: Release
 
+  MarksWidget:
+    build:
+      targets:
+        Marks: all
+        MarksWidget: all
+    run:
+      config: Debug
+    analyze:
+      config: Debug
+    archive:
+      config: Release
+
+  ShareExtension:
+    build:
+      targets:
+        Marks: all
+        ShareExtension: all
+    run:
+      config: Debug
+    analyze:
+      config: Debug
+    archive:
+      config: Release
+
 targets:
   Marks:
     type: application
     platform: iOS
     sources:
       - path: Marks
+      - path: MarksWidget/WidgetDataStore.swift
     settings:
       base:
         PRODUCT_BUNDLE_IDENTIFIER: com.magicive.marks
@@ -46,6 +72,8 @@ targets:
         ASSETCATALOG_COMPILER_APPICON_NAME: AppIcon
     dependencies:
       - target: ShareExtension
+      - target: MarksWidget
+      - sdk: WidgetKit.framework
 
   ShareExtension:
     type: app-extension
@@ -59,3 +87,18 @@ targets:
         CODE_SIGN_ENTITLEMENTS: ShareExtension/ShareExtension.entitlements
         SKIP_INSTALL: YES
         APPLICATION_EXTENSION_API_ONLY: YES
+
+  MarksWidget:
+    type: app-extension
+    platform: iOS
+    sources:
+      - path: MarksWidget
+    settings:
+      base:
+        PRODUCT_BUNDLE_IDENTIFIER: com.magicive.marks.MarksWidget
+        INFOPLIST_FILE: MarksWidget/Info.plist
+        CODE_SIGN_ENTITLEMENTS: MarksWidget/MarksWidget.entitlements
+        SKIP_INSTALL: YES
+    dependencies:
+      - sdk: WidgetKit.framework
+      - sdk: SwiftUI.framework