chore(env): add .env.example file and update .gitignore

- Introduced a new .env.example file with NODE_OPTIONS configuration.
- Updated .gitignore to exclude .env.example from being ignored.
- Added instructions in dev.md for copying .env.example to .env.

.env.example

@@ -0,0 +1 @@
+NODE_OPTIONS=--max-old-space-size=8000

.gitignore

@@ -41,6 +41,7 @@ stats.html
 # ENV
 .env
 .env.*
+!.env.example
 
 # Local
 local

docs/dev.md

@@ -31,6 +31,12 @@ corepack prepare yarn@4.6.0 --activate
 yarn install
 ```
 
+### ENV
+
+```bash
+copy .env.example .env
+```
+
 ### Start
 
 ```bash

src/renderer/src/pages/home/Tabs/index.tsx

@@ -188,6 +188,7 @@ const CustomTabs = styled.div`
   padding: 6px 0;
   border-bottom: 1px solid var(--color-border);
   background: transparent;
+  -webkit-app-region: no-drag;
   [navbar-position='top'] & {
     padding-top: 2px;
   }