tweaks (#1780)

* opt: sized

* fix: self send

* feat: ctrl enter to send

* opt: checked

* opt: download notifier

* opt: Future.syncValue

* mod: account

* mod: loading state

* opt: DebounceStreamMixin

* opt: report

* opt: enum map

* opt: file handler

* opt: dyn color

* opt: Uint8List subview

* opt: FileExt

* opt: computeLuminance

* opt: isNullOrEmpty

* opt: Get context

* update [skip ci]

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

* opt dynamicColor [skip ci]

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

* fixes [skip ci]

* update

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

* update

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

---------

Signed-off-by: My-Responsitories <107370289+My-Responsitories@users.noreply.github.com>
Co-authored-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/pages/login/controller.dart

@@ -738,13 +738,9 @@ class LoginPageController extends GetxController
       context: context,
       builder: (context) => AlertDialog(
         title: const Text('选择账号mid, 为0时使用匿名'),
-        titlePadding: const EdgeInsets.only(left: 22, top: 16, right: 22),
-        contentPadding: const EdgeInsets.symmetric(vertical: 5),
-        actionsPadding: const EdgeInsets.only(
-          left: 16,
-          right: 16,
-          bottom: 10,
-        ),
+        titlePadding: const .only(left: 22, top: 16, right: 22),
+        contentPadding: const .symmetric(vertical: 5),
+        actionsPadding: const .only(left: 16, right: 16, bottom: 10),
         content: SingleChildScrollView(
           child: Column(
             crossAxisAlignment: CrossAxisAlignment.start,