Rename to LatteX, add LaTeX autocomplete, fix comment highlight positionsv0.1.0

- Rename project from ClaudeTeX to LatteX (Cosmic Latte theme pun)
- Add new coffee cup logo and branded welcome/project screens
- Add 5-source LaTeX autocomplete: commands, environments, \ref, \cite, file paths
- Fix comment highlight drift by decoding WebSocket-encoded UTF-8 lines and range
  text via decodeURIComponent(escape()), matching Overleaf's client implementation
- Remove hacky byte-offset position remapping from index.ts
- Add pinch-to-zoom on PDF viewer

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

3 files changed, 31 insertions, 6 deletions

diff --git a/src/main/compilationManager.ts b/src/main/compilationManager.ts
index 3529345..8fbd946 100644
--- a/src/main/compilationManager.ts
+++ b/src/main/compilationManager.ts
@@ -15,7 +15,7 @@ export class CompilationManager {
   constructor(projectId: string, cookie: string) {
     this.projectId = projectId
     this.cookie = cookie
-    this.tmpDir = join(require('os').tmpdir(), `claudetex-${projectId}`)
+    this.tmpDir = join(require('os').tmpdir(), `lattex-${projectId}`)
   }
 
   get dir(): string {
diff --git a/src/main/index.ts b/src/main/index.ts
index 89a04b0..7fc1c4d 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -211,9 +211,9 @@ ipcMain.handle('overleaf:webLogin', async () => {
     // Inject a floating back button when navigated away from overleaf.com
     const injectBackButton = () => {
       loginWindow.webContents.executeJavaScript(`
-        if (!document.getElementById('claudetex-back-btn')) {
+        if (!document.getElementById('lattex-back-btn')) {
           const btn = document.createElement('div');
-          btn.id = 'claudetex-back-btn';
+          btn.id = 'lattex-back-btn';
           btn.innerHTML = '← Back';
           btn.style.cssText = 'position:fixed;top:8px;left:8px;z-index:999999;padding:6px 14px;' +
             'background:#333;color:#fff;border-radius:6px;cursor:pointer;font:13px -apple-system,sans-serif;' +
diff --git a/src/main/overleafSocket.ts b/src/main/overleafSocket.ts
index 52ac20f..1a12260 100644
--- a/src/main/overleafSocket.ts
+++ b/src/main/overleafSocket.ts
@@ -9,6 +9,15 @@ import {
   encodeHeartbeat
 } from './overleafProtocol'
 
+/** Decode WebSocket-encoded UTF-8 text (reverses server's unescape(encodeURIComponent(text))) */
+function decodeUtf8(text: string): string {
+  try {
+    return decodeURIComponent(escape(text))
+  } catch {
+    return text // already decoded or pure ASCII
+  }
+}
+
 export interface JoinProjectResult {
   publicId: string
   project: {
@@ -252,14 +261,30 @@ export class OverleafSocket extends EventEmitter {
     this.joinedDocs.add(docId)
 
     // Ack response format: [error, docLines, version, updates, ranges, pathname]
-    // First element is error (null = success)
     const err = result[0]
     if (err) throw new Error(`joinDoc failed: ${JSON.stringify(err)}`)
 
-    const docLines = (result[1] as string[]) || []
+    // Server encodes lines + range text via unescape(encodeURIComponent(text))
+    // for safe WebSocket transport. Decode with decodeURIComponent(escape(text)).
+    const rawLines = (result[1] as string[]) || []
+    const docLines = rawLines.map(line => decodeUtf8(line))
     const version = (result[2] as number) || 0
     const updates = (result[3] as unknown[]) || []
-    const ranges = (result[4] || { comments: [], changes: [] }) as JoinDocResult['ranges']
+    const rawRanges = result[4] as JoinDocResult['ranges'] | undefined
+
+    // Decode range text (op.c, op.i, op.d) — positions (op.p) stay as-is
+    const ranges = rawRanges || { comments: [], changes: [] }
+    if (ranges.comments) {
+      for (const c of ranges.comments) {
+        if (c.op?.c) c.op.c = decodeUtf8(c.op.c)
+      }
+    }
+    if (ranges.changes) {
+      for (const ch of ranges.changes as any[]) {
+        if (ch.op?.i) ch.op.i = decodeUtf8(ch.op.i)
+        if (ch.op?.d) ch.op.d = decodeUtf8(ch.op.d)
+      }
+    }
 
     return { docLines, version, updates, ranges }
   }