feat: Add improved html editor using CodeMirror

apps/web/package.json

@@ -11,6 +11,9 @@
     "clean": "rimraf node_modules .next .turbo"
   },
   "dependencies": {
+    "@codemirror/lang-html": "^6.4.11",
+    "@codemirror/theme-one-dark": "^6.1.3",
+    "@codemirror/view": "^6.39.0",
     "@plunk/db": "*",
     "@plunk/shared": "*",
     "@plunk/ui": "*",
@@ -31,6 +34,7 @@
     "@tiptap/starter-kit": "^3.11.0",
     "@tiptap/suggestion": "^3.11.0",
     "@types/dagre": "^0.7.53",
+    "@uiw/react-codemirror": "^4.25.3",
     "@xyflow/react": "^12.9.3",
     "dagre": "^0.8.5",
     "framer-motion": "^12.23.24",

apps/web/src/components/EmailEditor/EmailEditor.tsx

@@ -10,6 +10,7 @@ import {Variable} from './VariableExtension';
 import {setAvailableVariables, VariableMention} from './VariableMention';
 import {Toolbar} from './Toolbar';
 import {ResizableImage} from './ResizableImage';
+import {HtmlEditor} from './HtmlEditor';
 import {useContactFields, useContacts} from '../../lib/hooks/useContacts';
 import {useConfig} from '../../lib/hooks/useConfig';
 import {useEffect, useRef, useState} from 'react';
@@ -556,12 +557,11 @@ export function EmailEditor({value, onChange, placeholder, subject, from, replyT
         </>
       ) : (
         <>
-          <div className="min-h-[400px] max-h-[600px] overflow-y-auto">
+          <div className="min-h-[400px] max-h-[600px] overflow-hidden">
-            <textarea
+            <HtmlEditor
               value={htmlContent}
-              onChange={e => handleHtmlChange(e.target.value)}
+              onChange={handleHtmlChange}
               placeholder={placeholder || 'Your next email starts here!'}
-              className="w-full h-full px-4 py-3 text-sm font-mono resize-none min-h-[400px] focus:outline-none"
             />
           </div>
           {selectedContactId && (

apps/web/src/components/EmailEditor/HtmlEditor.tsx

@@ -0,0 +1,103 @@
+import CodeMirror from '@uiw/react-codemirror';
+import {html} from '@codemirror/lang-html';
+import {EditorView} from '@codemirror/view';
+import {useMemo} from 'react';
+
+interface HtmlEditorProps {
+  value: string;
+  onChange: (value: string) => void;
+  placeholder?: string;
+}
+
+export function HtmlEditor({value, onChange, placeholder}: HtmlEditorProps) {
+  // Custom theme configuration for better integration with the app
+  const theme = EditorView.theme({
+    '&': {
+      fontSize: '14px',
+      fontFamily: 'ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace',
+      height: '100%',
+    },
+    '.cm-content': {
+      minHeight: '400px',
+      padding: '12px 16px',
+      caretColor: '#1f2937',
+    },
+    '.cm-line': {
+      padding: '0',
+      lineHeight: '1.6',
+    },
+    '.cm-gutters': {
+      backgroundColor: '#f9fafb',
+      color: '#9ca3af',
+      border: 'none',
+      borderRight: '1px solid #e5e7eb',
+      paddingRight: '8px',
+      paddingLeft: '8px',
+    },
+    '.cm-activeLineGutter': {
+      backgroundColor: '#f3f4f6',
+      color: '#374151',
+    },
+    '.cm-activeLine': {
+      backgroundColor: '#f9fafb',
+    },
+    '.cm-selectionBackground, ::selection': {
+      backgroundColor: '#dbeafe !important',
+    },
+    '.cm-focused .cm-selectionBackground, .cm-focused ::selection': {
+      backgroundColor: '#bfdbfe !important',
+    },
+    '.cm-cursor': {
+      borderLeftColor: '#1f2937',
+    },
+    '&.cm-focused': {
+      outline: 'none',
+    },
+    '.cm-scroller': {
+      overflow: 'auto',
+      maxHeight: '600px',
+    },
+  });
+
+  // Extensions with HTML support and line numbers
+  const extensions = useMemo(
+    () => [
+      html(),
+      theme,
+      EditorView.lineWrapping, // Enable line wrapping for long lines
+    ],
+    [theme]
+  );
+
+  return (
+    <div className="html-editor-container">
+      <CodeMirror
+        value={value}
+        height="100%"
+        extensions={extensions}
+        onChange={onChange}
+        placeholder={placeholder}
+        basicSetup={{
+          lineNumbers: true,
+          highlightActiveLineGutter: true,
+          highlightActiveLine: true,
+          foldGutter: true,
+          dropCursor: true,
+          allowMultipleSelections: true,
+          indentOnInput: true,
+          bracketMatching: true,
+          closeBrackets: true,
+          autocompletion: true,
+          rectangularSelection: true,
+          crosshairCursor: true,
+          highlightSelectionMatches: true,
+          closeBracketsKeymap: true,
+          searchKeymap: true,
+          foldKeymap: true,
+          completionKeymap: true,
+          lintKeymap: true,
+        }}
+      />
+    </div>
+  );
+}

apps/web/src/pages/campaigns/[id].tsx

@@ -577,7 +577,6 @@ export default function CampaignDetailsPage() {
                   setEditedCampaign({...editedCampaign, body});
                   setHasChanges(true);
                 }}
-                placeholder="<h1>Welcome!</h1><p>Your email content here...</p>"
               />
             </CardContent>
           </Card>

apps/web/src/pages/campaigns/create.tsx

@@ -197,11 +197,7 @@ export default function CreateCampaignPage() {
                       <Label htmlFor="body">
                         Email Body <span className="text-red-500">*</span>
                       </Label>
-                      <EmailEditor
+                      <EmailEditor value={body} onChange={setBody} />
-                        value={body}
-                        onChange={setBody}
-                        placeholder="<h1>Welcome!</h1><p>Your email content here...</p>"
-                      />
                     </div>
                   </CardContent>
                 </Card>

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   languageName: node
   linkType: hard
 
+"codemirror@npm:^6.0.0":
+  version: 6.0.2
+  resolution: "codemirror@npm:6.0.2"
+  dependencies:
+    "@codemirror/autocomplete": "npm:^6.0.0"
+    "@codemirror/commands": "npm:^6.0.0"
+    "@codemirror/language": "npm:^6.0.0"
+    "@codemirror/lint": "npm:^6.0.0"
+    "@codemirror/search": "npm:^6.0.0"
+    "@codemirror/state": "npm:^6.0.0"
+    "@codemirror/view": "npm:^6.0.0"
+  checksum: 10c0/8d198d8aebc32e56c966ac57b0fe8f832b7d601a2f62819ba3a294570233982bf4d5b499a764194b6b26dbc5313a156c2611cbc542234ea6eae6accf07a651ab
+  languageName: node
+  linkType: hard
+
 "collapse-white-space@npm:^2.0.0":
   version: 2.1.0
   resolution: "collapse-white-space@npm:2.1.0"
@@ -8703,7 +8973,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"crelt@npm:^1.0.0":
+"crelt@npm:^1.0.0, crelt@npm:^1.0.5, crelt@npm:^1.0.6":
   version: 1.0.6
   resolution: "crelt@npm:1.0.6"
   checksum: 10c0/e0fb76dff50c5eb47f2ea9b786c17f9425c66276025adee80876bdbf4a84ab72e899e56d3928431ab0cb057a105ef704df80fe5726ef0f7b1658f815521bdf09
@@ -17426,6 +17696,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"style-mod@npm:^4.0.0, style-mod@npm:^4.1.0":
+  version: 4.1.3
+  resolution: "style-mod@npm:4.1.3"
+  checksum: 10c0/36059006ea73cd96242ca8be06b625522d488bf8caca9c18436edf77092183381f08109577a4b3d35482f3395231099f195dbc854a46ce507fbf75c484f2cfcc
+  languageName: node
+  linkType: hard
+
 "style-to-js@npm:^1.0.0":
   version: 1.1.21
   resolution: "style-to-js@npm:1.1.21"
@@ -18673,7 +18950,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"w3c-keyname@npm:^2.2.0":
+"w3c-keyname@npm:^2.2.0, w3c-keyname@npm:^2.2.4":
   version: 2.2.8
   resolution: "w3c-keyname@npm:2.2.8"
   checksum: 10c0/37cf335c90efff31672ebb345577d681e2177f7ff9006a9ad47c68c5a9d265ba4a7b39d6c2599ceea639ca9315584ce4bd9c9fbf7a7217bfb7a599e71943c4c4
@@ -18716,6 +18993,9 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "web@workspace:apps/web"
   dependencies:
+    "@codemirror/lang-html": "npm:^6.4.11"
+    "@codemirror/theme-one-dark": "npm:^6.1.3"
+    "@codemirror/view": "npm:^6.39.0"
     "@plunk/db": "npm:*"
     "@plunk/eslint-config": "npm:*"
     "@plunk/shared": "npm:*"
@@ -18743,6 +19023,7 @@ __metadata:
     "@types/node": "npm:^24.10.0"
     "@types/react": "npm:^19.2.7"
     "@types/react-dom": "npm:^19.2.3"
+    "@uiw/react-codemirror": "npm:^4.25.3"
     "@xyflow/react": "npm:^12.9.3"
     dagre: "npm:^0.8.5"
     framer-motion: "npm:^12.23.24"