fix: resolve PR review comments on messaging

- Clarify dev server stop message (SFDX: Close Live Preview)
- Add 'URL' to browser open hints for consistency

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: deepu-mungamuri94

messages/webapp.dev.md

@@ -80,12 +80,12 @@ Dev server URL: %s
 
 # info.proxy-url
 
-Proxy URL: %s (open this in your browser)
+Proxy URL: %s (open this URL in your browser)
 
 # info.ready-for-development
 
 ✅ Ready for development!
-  → Proxy: %s (open this in your browser)
+  → Proxy: %s (open this URL in your browser)
   → Dev server: %s
 
 # info.press-ctrl-c
@@ -94,7 +94,7 @@ Press Ctrl+C to stop
 
 # info.server-running
 
-Server running (stop via the calling process)
+Dev server is running. Stop it by running **SFDX: Close Live Preview** from the VS Code command palette.
 
 # info.dev-server-healthy
 
@@ -189,4 +189,4 @@ Vite WebApp proxy detected at %s - using Vite's built-in proxy (standalone proxy
 # info.ready-for-development-vite
 
 ✅ Ready for development!
-  → Dev server: %s (Vite proxy active - open this in your browser)
+  → Dev server: %s (Vite proxy active - open this URL in your browser)