fix: clean up codemirror panel resizing

frontend/src/components/CodeEditor.tsx

@@ -78,7 +78,15 @@ export const CodeEditor = ({ initialState, onTextChanged }: { initialState: Init
 
       const state = EditorState.create({
         doc: initialState.initialText,
-        extensions: [commonExtensions, isDarkMode ? atomone : githubLight, json5(), editingExtensions],
+        extensions: [
+          ...commonExtensions,
+          isDarkMode ? atomone : githubLight,
+          json5(),
+          editingExtensions,
+          EditorView.theme({
+            '&': { height: '100%' },
+          }),
+        ],
       })
 
       const view = new EditorView({
@@ -94,5 +102,5 @@ export const CodeEditor = ({ initialState, onTextChanged }: { initialState: Init
     }
   }, [initialState, isDarkMode])
 
-  return <div ref={editorContainerRef} />
+  return <div className='h-full' ref={editorContainerRef} />
 }

frontend/src/components/ResizeableVerticalPanels.tsx

@@ -44,12 +44,14 @@ export const ResizableVerticalPanels: React.FC<ResizableVerticalPanelsProps> = (
   }
 
   const onDrag = (e: React.MouseEvent<HTMLDivElement>) => {
-    if (isDragging) {
-      const newHeight = e.clientY
-      const maxHeight = window.innerHeight - minBottomPanelHeight
-      if (newHeight >= minTopPanelHeight && newHeight <= maxHeight) {
-        setTopPanelHeight(newHeight - 44)
-      }
+    if (!isDragging || !containerRef.current) {
+      return
+    }
+    const containerDims = containerRef.current.getBoundingClientRect()
+    const newHeight = e.clientY - containerDims.top
+    const maxHeight = containerDims.height - minBottomPanelHeight
+    if (newHeight >= minTopPanelHeight && newHeight <= maxHeight) {
+      setTopPanelHeight(newHeight)
     }
   }
 

frontend/src/features/verbs/VerbFormInput.tsx

@@ -27,7 +27,7 @@ export const VerbFormInput = ({
   return (
     <form onSubmit={handleSubmit} className='rounded-lg'>
       <div className='flex rounded-md shadow-sm'>
-        <span className='inline-flex items-center rounded-l-md border border-r-0 border-gray-300 dark:border-gray-500 px-3 sm:text-sm'>{requestType}</span>
+        <span className='inline-flex items-center rounded-l-md border border-r-0 border-gray-300 dark:border-gray-500 px-3 ml-4 sm:text-sm'>{requestType}</span>
         <input
           type='text'
           name='request-path'
@@ -37,7 +37,7 @@ export const VerbFormInput = ({
           readOnly={readOnly}
           onChange={(event) => setPath(event.target.value)}
         />
-        <button type='submit' className='bg-indigo-700 text-white ml-2 px-4 py-2 rounded-lg hover:bg-indigo-600 focus:outline-none focus:bg-indigo-600'>
+        <button type='submit' className='bg-indigo-700 text-white ml-2 mr-4 px-4 py-2 rounded-lg hover:bg-indigo-600 focus:outline-none focus:bg-indigo-600'>
           Send
         </button>
       </div>

frontend/src/features/verbs/VerbRequestForm.tsx

@@ -1,5 +1,6 @@
 import { useEffect, useState } from 'react'
 import { CodeEditor, type InitialState } from '../../components/CodeEditor'
+import { ResizableVerticalPanels } from '../../components/ResizeableVerticalPanels'
 import { useClient } from '../../hooks/use-client'
 import type { Module, Verb } from '../../protos/xyz/block/ftl/v1/console/console_pb'
 import { VerbService } from '../../protos/xyz/block/ftl/v1/ftl_connect'
@@ -101,8 +102,19 @@ export const VerbRequestForm = ({ module, verb }: { module?: Module; verb?: Verb
 
   const bottomText = response ?? error ?? ''
 
+  const bodyEditor = <CodeEditor initialState={initialEditorState} onTextChanged={handleEditorTextChanged} />
+  const bodyPanels =
+    bottomText === '' ? (
+      bodyEditor
+    ) : (
+      <ResizableVerticalPanels
+        topPanelContent={bodyEditor}
+        bottomPanelContent={<CodeEditor initialState={{ initialText: bottomText, readonly: true }} onTextChanged={setHeadersText} />}
+      />
+    )
+
   return (
-    <div className='flex flex-col h-full overflow-hidden pt-4 px-4'>
+    <div className='flex flex-col h-full overflow-hidden pt-4'>
       <VerbFormInput
         requestType={requestType(verb)}
         initialPath={httpPopulatedRequestPath(module, verb)}
@@ -112,7 +124,7 @@ export const VerbRequestForm = ({ module, verb }: { module?: Module; verb?: Verb
       />
       <div>
         <div className='border-b border-gray-200 dark:border-white/10'>
-          <nav className='-mb-px flex space-x-6' aria-label='Tabs'>
+          <nav className='-mb-px flex space-x-6 pl-4' aria-label='Tabs'>
             {tabs.map((tab) => (
               <button
                 type='button'
@@ -133,17 +145,12 @@ export const VerbRequestForm = ({ module, verb }: { module?: Module; verb?: Verb
         </div>
       </div>
       <div className='flex-1 overflow-hidden'>
-        <div className='h-1/2 overflow-y-scroll'>
-          {activeTabId === 'body' && <CodeEditor initialState={initialEditorState} onTextChanged={handleEditorTextChanged} />}
+        <div className='h-full overflow-y-scroll'>
+          {activeTabId === 'body' && bodyPanels}
           {activeTabId === 'verbschema' && <CodeEditor initialState={{ initialText: verb?.schema ?? 'what', readonly: true }} />}
           {activeTabId === 'jsonschema' && <CodeEditor initialState={{ initialText: verb?.jsonRequestSchema ?? '', readonly: true }} />}
           {activeTabId === 'headers' && <CodeEditor initialState={initialHeadersState} onTextChanged={handleHeadersTextChanged} />}
         </div>
-
-        <div className='border-b border-gray-200 dark:border-white/10' />
-        <div className='h-1/2 overflow-y-scroll'>
-          <CodeEditor initialState={{ initialText: bottomText, readonly: true }} onTextChanged={setHeadersText} />
-        </div>
       </div>
     </div>
   )