remove most uses of as any in typescript

- replaced many uses of `as any` with another more specific cast `as T`
- filled in missing typed for items that needed to be typed
  - new runtime code was added where necessary to satisfy the new types with comments
- added missing theme variable "sidebar-active" to the Theme variables
- forms using `react-hook-form` are now typechecked
- changed some instances of `target` into `currentTarget` while removing `as any` assertions

src/components/common/messaging/Message.tsx

@@ -35,7 +35,12 @@ function Message({ attachContext, message, contrast, content: replacement, head:
     const content = message.content as string;
     const head = preferHead || (message.replies && message.replies.length > 0);
 
-    const userContext = attachContext ? attachContextMenu('Menu', { user: message.author, contextualChannel: message.channel }) : undefined as any; // ! FIXME: tell fatal to make this type generic
+     // ! FIXME: tell fatal to make this type generic
+    // bree: Fatal please...
+    const userContext = attachContext 
+        ? attachContextMenu('Menu', { user: message.author, contextualChannel: message.channel }) as any
+        : undefined;
+
     const openProfile = () => openScreen({ id: 'profile', user_id: message.author });
 
     return (

src/components/common/messaging/attachments/AttachmentActions.tsx

@@ -18,7 +18,8 @@ export default function AttachmentActions({ attachment }: Props) {
     const open_url = `${url}/${filename}`;
     const download_url = url.replace('attachments', 'attachments/download')
 
-    const filesize = determineFileSize(size as any);
+    // for some reason revolt.js says the size is a string even though it's a number
+    const filesize = determineFileSize(size as unknown as number);
 
     switch (metadata.type) {
         case 'Image':