Refactor chat and inline suggestion APIs to remove smoothStream usage…

apps/snow-leopard/app/api/chat/route.ts

@@ -1,7 +1,6 @@
 import {
   type Message,
   createDataStreamResponse,
-  smoothStream,
   streamText,
 } from 'ai';
 import { systemPrompt } from '@/lib/ai/prompts';
@@ -348,8 +347,7 @@ export async function POST(request: Request) {
           system: enhancedSystemPrompt,
           messages,
           maxSteps: 5,
-          experimental_activeTools: activeToolsList, 
-          experimental_transform: smoothStream({ chunking: 'line' }),
+          experimental_activeTools: activeToolsList,
           experimental_generateMessageId: generateUUID,
           tools: availableTools, 
           onFinish: async ({ response, reasoning }) => {

apps/snow-leopard/app/api/inline-suggestion/route.ts

@@ -1,5 +1,5 @@
 import { NextResponse } from 'next/server';
-import { streamText, smoothStream } from 'ai';
+import { streamText } from 'ai';
 import { getDocumentById } from '@/lib/db/queries';
 import { myProvider } from '@/lib/ai/providers';
 import { auth } from "@/lib/auth";
@@ -161,7 +161,6 @@ async function streamInlineSuggestion({
   const { fullStream } = streamText({
     model: myProvider.languageModel('artifact-model'),
     system: getSystemPrompt(aiOptions?.customInstructions),
-    experimental_transform: smoothStream({ chunking: 'word' }),
     prompt,
     temperature: 0.4, // Fixed temperature for text
     maxTokens: maxTokens,

apps/snow-leopard/app/api/synonyms/route.ts

@@ -0,0 +1,37 @@
+import { NextResponse } from 'next/server';
+import { generateText } from 'ai'; // Using generateText for a non-streaming response
+import { myProvider } from '@/lib/ai/providers'; // Assuming myProvider is configured
+
+export async function POST(request: Request) {
+  try {
+    const { word, context } = await request.json();
+
+    if (!word) {
+      return NextResponse.json({ error: 'Missing word parameter' }, { status: 400 });
+    }
+
+    const prompt = context
+      ? `Given the following text context: "${context}"\n\nProvide exactly two common synonyms for the word "${word}" that fit well within that context. Separate the synonyms with a comma. Do not include the original word. Only output the synonyms. Example: joyful, cheerful`
+      : `Provide exactly two common synonyms for the word "${word}". Separate the synonyms with a comma. Do not include the original word. Only output the synonyms. Example: happy -> joyful, cheerful`;
+
+    const { text } = await generateText({
+      model: myProvider.languageModel('artifact-model'),
+      prompt,
+      maxTokens: 20,
+      temperature: 0.3,
+    });
+
+    const synonyms = text.split(',')
+      .map(s => s.trim())
+      .filter(s => s !== '' && s.toLowerCase() !== word.toLowerCase())
+      .slice(0, 2);
+
+    return NextResponse.json({ synonyms });
+
+  } catch (error: any) {
+    if (error instanceof SyntaxError) {
+         return NextResponse.json({ error: 'Invalid request body' }, { status: 400 });
+    }
+    return NextResponse.json({ error: 'Failed to fetch synonyms' }, { status: 500 });
+  }
+} 

apps/snow-leopard/components/document/text-editor.tsx

@@ -32,6 +32,8 @@ import { placeholderPlugin } from '@/lib/editor/placeholder-plugin';
 
 import { savePlugin, savePluginKey, setSaveStatus, type SaveState, type SaveStatus } from '@/lib/editor/save-plugin';
 
+import { synonymsPlugin } from '@/lib/editor/synonym-plugin';
+
 type EditorProps = {
   content: string;
   status: 'streaming' | 'idle';
@@ -228,6 +230,7 @@ function PureEditor({
           ],
         }),
         inlineSuggestionPlugin({ requestSuggestion: requestInlineSuggestionCallback }),
+        synonymsPlugin(),
         savePlugin({
           saveFunction: performSave,
           initialLastSaved: initialLastSaved,
@@ -568,6 +571,50 @@ function PureEditor({
         div.ProseMirror {
           position: relative;
         }
+
+        .synonym-word {
+          /* Cursor is handled by the browser default for text */
+          position: relative; /* Needed for absolute positioning of pseudo-element */
+          display: inline-block; /* Ensure span takes space for overlay */
+        }
+        .synonym-overlay-menu {
+          /* Dark background like the image */
+          background: #282c34; /* Dark grey/black */
+          color: #fff; /* White text */
+          border: none; /* Remove default border */
+          padding: 4px;
+          border-radius: 4px;
+          box-shadow: 0 2px 8px rgba(0,0,0,0.1);
+          display: flex; /* Arrange buttons horizontally */
+          gap: 4px; /* Spacing between buttons */
+        }
+        .synonym-overlay-menu .synonym-option {
+          background: none;
+          border: none;
+          padding: 2px 6px; /* Adjust padding */
+          margin: 0; /* Remove default margin */
+          cursor: pointer;
+          font: inherit;
+          color: inherit; /* Inherit white text color */
+          border-radius: 3px; /* Slightly rounded corners */
+        }
+        .synonym-overlay-menu .synonym-option:hover {
+          /* Slightly lighter background on hover */
+          background: rgba(255, 255, 255, 0.1);
+        }
+        /* Loading state overlay */
+        .synonym-loading::before {
+          content: '';
+          position: absolute;
+          top: 0;
+          left: 0;
+          right: 0;
+          bottom: 0;
+          background-color: rgba(100, 100, 100, 0.2); /* Semi-transparent gray overlay */
+          border-radius: 2px; /* Optional: slightly rounded corners */
+          pointer-events: none; /* Allow clicks/hovers to pass through */
+          z-index: 1; /* Ensure it's above the text but below potential popups */
+        }
       `}</style>
     </>
   );