Adjust timeout recommendation to be proportional to build time

Co-authored-by: PeterDaveHello <[email protected]>

Author: Copilot

.github/copilot-instructions.md

@@ -9,7 +9,7 @@ Always reference these instructions first and fallback to search or bash command
 ### Bootstrap and Build
 - Install dependencies: `npm ci` -- takes 30 seconds. Ignore npm audit warnings about vulnerabilities.
 - Development build: `npm run dev` -- takes 13 seconds, runs webpack in watch mode. NEVER CANCEL.
-- Production build: `npm run build` -- takes 33 seconds. NEVER CANCEL. Set timeout to 90+ minutes.
+- Production build: `npm run build` -- takes 33 seconds. NEVER CANCEL. Set timeout to 5-10 minutes to account for system variations.
 - Lint code: `npm run lint` -- takes 3-5 seconds, uses ESLint.
 - Format code: `npm run pretty` -- uses Prettier to format all JS/JSX/CSS files.
 - Safari build: `npm run build:safari` -- only works on macOS with Xcode installed.
@@ -160,7 +160,7 @@ The extension supports multiple AI providers:
 ## Time Expectations
 - **NEVER CANCEL builds or long-running commands**
 - `npm ci`: 30 seconds
-- `npm run build`: 33 seconds (measured actual time) - NEVER CANCEL, set timeout to 90+ minutes
+- `npm run build`: 33 seconds (measured actual time) - NEVER CANCEL, set timeout to 5-10 minutes
 - `npm run dev`: 13 seconds initial build, then watches for changes - NEVER CANCEL
 - `npm run lint`: 3-5 seconds  
 - Manual extension testing: 5-10 minutes for thorough validation