prepare for domain change, add settings migration

src/modules/changelog/changelog.json

@@ -1,5 +1,16 @@
 {
     "current": {
+        "version": "7.4",
+        "date": "September 9, 2023",
+        "title": "new domain, what's coming in future, bug fixes, and more!",
+        "banner": {
+            "file": "newdomain.webp",
+            "width": 960,
+            "height": 540
+        },
+        "content": "cobalt is finally moving to its own domain, making it possible to host branches and various versions with ease and 0 confusion. bla bla bla. bla. bla bla."
+    },
+    "history": [{
         "version": "7.2 & 7.3",
         "date": "September 6, 2023",
         "title": "extended video length limit, metadata toggle, ui improvements, and more!",
@@ -9,8 +20,7 @@
             "height": 280
         },
         "content": "this update gives cobalt a sharp look in chromium browsers and makes it even more useful than before. check out the full changelog below!\n\nservice improvements:\n*; increased video length limit from 3 hours to 5 hours. feel free to download lectures you need :)\n*; you can now disable file metadata in settings.\n*; fixed a bug which previously caused some downloads to end up being 0 bytes.\n\nui improvements:\n*; fixed clickable area for urgent notice (text on top).\n*; fixed blurry header in chrome.\n*; fixed blurry tab bar in chrome.\n*; fixed blurry switches in chrome.\n*; fixed weirdly rounded corners in popups.\n*; fixed 1px gap on edges of various elements in popup in chrome.\n*; fixed overscrolling in other settings tab on ios.\n*; fixed unexpected button highlight effect on phones.\n*; removed outdated fixes for tiny screens.\n\nother improvements:\n*; cobalt web & api start faster than before, additional preparation functions aren't unexpectedly run anymore.\n*; cobalt is now available as a docker package. check it out on <a class=\"text-backdrop link\" href=\"https://github.com/wukko/cobalt/pkgs/container/cobalt\" target=\"_blank\">github</a>.\n\nthank you for being here. i hope you have a great day :D"
-    },
-    "history": [{
+    }, {
         "version": "7.1",
         "date": "August 20, 2023",
         "title": "instagram, streamable, video metadata, and more!",