Remove flutter chat (#26)

Had to squash merge manually as Forgejo was erroring

lib/helpers/extensions/get_localpart.dart

@@ -1,3 +1,3 @@
 extension GetLocalpart on String {
-  String get localpart => substring(1).split(":").first;
+  String get localpart => length > 1 ? substring(1).split(":").first : "?";
 }

lib/helpers/extensions/show_user_popover.dart

@@ -1,18 +1,24 @@
 import "package:flutter/material.dart";
 import "package:nexus/helpers/extensions/show_context_menu.dart";
-import "package:nexus/models/membership.dart";
-import "package:nexus/widgets/chat_page/user_popover.dart";
+import "package:nexus/models/content/membership.dart";
+import "package:nexus/widgets/user_popover.dart";
 
 extension ShowUserPopover on BuildContext {
-  void showUserPopover(Membership member, {required Offset globalPosition}) =>
-      showContextMenu(
-        globalPosition: globalPosition,
-        children: [
-          PopupMenuItem(
-            enabled: false,
-            padding: EdgeInsets.symmetric(horizontal: 16, vertical: 8),
-            child: IconTheme(data: IconThemeData(), child: UserPopover(member)),
-          ),
-        ],
-      );
+  void showUserPopover(
+    MembershipContent member,
+    String userId, {
+    required Offset globalPosition,
+  }) => showContextMenu(
+    globalPosition: globalPosition,
+    children: [
+      PopupMenuItem(
+        enabled: false,
+        padding: EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+        child: IconTheme(
+          data: IconThemeData(),
+          child: UserPopover(member, userId),
+        ),
+      ),
+    ],
+  );
 }

lib/helpers/extensions/size_to_string.dart

@@ -0,0 +1,22 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+
+extension SizeToString on int {
+  String get sizeAsString {
+    const IListConst<String> suffixes = IListConst([
+      "B",
+      "KB",
+      "MB",
+      "GB",
+      "TB",
+      "PB",
+    ]);
+
+    var i = 0;
+    var size = toDouble();
+    while (size > 1024 && i < suffixes.length - 1) {
+      size /= 1024;
+      i++;
+    }
+    return "${size.toStringAsFixed(2)} ${suffixes[i]}";
+  }
+}

lib/helpers/extensions/string_to_color.dart

@@ -0,0 +1,6 @@
+import "package:color_hash/color_hash.dart";
+import "package:flutter/material.dart";
+
+extension ToColor on String {
+  Color get colorHash => ColorHash(this, lightness: .7, saturation: .7).color;
+}