fix janky reply form

src/components/PostEditor/PostContent.tsx

@@ -47,6 +47,7 @@ import {
 } from '@/constants'
 import { cn } from '@/lib/utils'
 import { useNostr } from '@/providers/NostrProvider'
+import { useScreenSize } from '@/providers/ScreenSizeProvider'
 import { useReplyIngress } from '@/hooks/useReplyIngress'
 import { canonicalizeRssArticleUrl, getArticleUrlFromCommentITags } from '@/lib/rss-article'
 import { cleanUrl, isBlossomBudBlobUrl, rewritePlainTextHttpUrls } from '@/lib/url'
@@ -200,6 +201,7 @@ export default function PostContent({
 }) {
   const { t, i18n } = useTranslation()
   const { pubkey, publish, checkLogin, canSignEvents } = useNostr()
+  const { isSmallScreen } = useScreenSize()
   const { addReplies } = useReplyIngress()
 
   const mergePublishedReplyIntoThread = useCallback(
@@ -2519,7 +2521,19 @@ export default function PostContent({
   }
 
   return (
-    <div className="space-y-2 min-w-0">
+    <div
+      className={cn(
+        'min-w-0',
+        isSmallScreen ? 'flex min-h-0 flex-1 flex-col' : 'space-y-2'
+      )}
+    >
+      <NeventPickerProvider>
+        <div
+          className={cn(
+            'space-y-2 min-w-0',
+            isSmallScreen && 'min-h-0 flex-1 overflow-y-auto overscroll-y-contain'
+          )}
+        >
       {/* Dynamic Title based on mode */}
       <div className="text-lg font-semibold">
         {(() => {
@@ -2569,7 +2583,7 @@ export default function PostContent({
       </div>
       
       {parentEvent && (
-        <ScrollArea className="flex max-h-48 flex-col overflow-y-auto rounded-lg border bg-muted/40">
+        <ScrollArea className="flex max-h-32 sm:max-h-48 flex-col overflow-y-auto rounded-lg border bg-muted/40">
           <div className="p-2 sm:p-3 pointer-events-none">
             <Note size="small" event={parentEvent} hideParentNotePreview />
           </div>
@@ -3355,7 +3369,6 @@ export default function PostContent({
         </div>
       )}
       
-      <NeventPickerProvider>
       <PostTextarea
           ref={textareaRef}
           text={text}
@@ -3364,7 +3377,7 @@ export default function PostContent({
           parentEvent={isDiscussionThread && !parentEvent ? THREAD_POST_EDITOR_PARENT : parentEvent}
           onSubmit={() => post()}
           className={cn(
-            isPoll ? 'min-h-20' : 'min-h-52',
+            isPoll ? 'min-h-20' : isSmallScreen ? 'min-h-36' : 'min-h-52',
             isDiscussionThread && threadErrors.content && 'border-destructive'
           )}
           onUploadStart={handleUploadStart}
@@ -3718,6 +3731,14 @@ export default function PostContent({
           <button ref={mediaUploaderBtnRef} type="button" aria-hidden="true" tabIndex={-1} />
         </Uploader>
       )}
+        </div>
+      <div
+        className={cn(
+          'space-y-2 min-w-0',
+          isSmallScreen &&
+            'sticky bottom-0 z-10 shrink-0 border-t border-border bg-background pt-2 pb-[max(0.5rem,env(safe-area-inset-bottom,0px))]'
+        )}
+      >
       <div className="flex min-w-0 w-full items-center gap-1.5">
         <div className="min-w-0 flex-1 overflow-x-auto overscroll-x-contain">
           <PostEditorFormatToolbar
@@ -3873,6 +3894,7 @@ export default function PostContent({
           inComposer
         />
       ) : null}
+      </div>
 
       {/* Media Kind Selection Dialog */}
       <Dialog open={showMediaKindDialog} onOpenChange={setShowMediaKindDialog}>

src/components/PostEditor/PostTextarea/index.tsx

@@ -13,10 +13,12 @@ import Text from '@tiptap/extension-text'
 import { TextSelection } from '@tiptap/pm/state'
 import { Editor, EditorContent, useEditor } from '@tiptap/react'
 import { Event } from 'nostr-tools'
+import { useScreenSizeOptional } from '@/providers/ScreenSizeProvider'
 import {
   Dispatch,
   forwardRef,
   SetStateAction,
+  useEffect,
   useImperativeHandle,
   useMemo,
   useRef,
@@ -122,6 +124,7 @@ const PostTextarea = forwardRef<
     ref
   ) => {
     const { t } = useTranslation()
+    const isSmallScreen = useScreenSizeOptional()?.isSmallScreen ?? false
     const onUploadSuccessRef = useRef(onUploadSuccess)
     onUploadSuccessRef.current = onUploadSuccess
     const onUploadCompressPhaseRef = useRef(onUploadCompressPhase)
@@ -197,6 +200,19 @@ const PostTextarea = forwardRef<
 
     editorRef.current = editor
 
+    useEffect(() => {
+      if (!editor || !isSmallScreen) return
+      const scrollEditorIntoView = () => {
+        requestAnimationFrame(() => {
+          editor.view.dom.scrollIntoView({ block: 'nearest', inline: 'nearest' })
+        })
+      }
+      editor.on('focus', scrollEditorIntoView)
+      return () => {
+        editor.off('focus', scrollEditorIntoView)
+      }
+    }, [editor, isSmallScreen])
+
     useImperativeHandle(ref, () => ({
       appendText: (text: string, addNewline = false) => {
         const ed = editorRef.current

src/components/PostEditor/index.tsx

@@ -98,7 +98,7 @@ export default function PostEditor({
     return (
       <Sheet open={open} onOpenChange={setOpen}>
         <SheetContent
-          className="h-full w-full max-w-full p-0 border-none overflow-hidden"
+          className="flex h-[var(--vh,100dvh)] max-h-[var(--vh,100dvh)] w-full max-w-full flex-col p-0 border-none overflow-hidden data-[state=open]:duration-200 data-[state=closed]:duration-200"
           side="bottom"
           hideClose
           onInteractOutside={(e) => {
@@ -114,15 +114,13 @@ export default function PostEditor({
             }
           }}
         >
-          <ScrollArea className="px-4 h-full max-h-screen min-w-0 overflow-x-auto" scrollBarClassName="opacity-100">
-            <div className="space-y-4 px-2 pr-4 py-6 min-w-0">
-              <SheetHeader className="sr-only">
-                <SheetTitle>Post Editor</SheetTitle>
-                <SheetDescription>Create a new post or reply</SheetDescription>
-              </SheetHeader>
-              {content}
-            </div>
-          </ScrollArea>
+          <div className="flex min-h-0 flex-1 flex-col px-4 pt-4 pb-2 min-w-0">
+            <SheetHeader className="sr-only">
+              <SheetTitle>Post Editor</SheetTitle>
+              <SheetDescription>Create a new post or reply</SheetDescription>
+            </SheetHeader>
+            {content}
+          </div>
         </SheetContent>
       </Sheet>
     )