Disable forced PyTorch upgrades

Disables automatic PyTorch version upgrades that were forcing all NVIDIA
users to download 1.5GB packages without consent.

## What Changed
- Commented out `ensureRecommendedNvidiaTorch()` call in updatePackages()
- Users will no longer be forced to upgrade PyTorch on app startup

## Why
The automatic upgrade introduced in PR #1513 caused several issues:
- Forced 1.5GB downloads without user warning or consent
- Caused installation failures for users with slow/metered connections
- Blocked Chinese users when packages weren't available on mirrors
- No opt-out mechanism

## User Impact
- NVIDIA users will keep their current PyTorch versions
- No more forced package reinstalls on app startup
- Users can manually upgrade PyTorch if they want new features

## Next Steps
A follow-up PR will add optional user-prompted PyTorch upgrades with
proper consent dialogs and preference tracking.

Related: PR #1513, PR #1525
Fixes: Forced PyTorch upgrade crisis (Jan 8-14, 2026)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: christian-byrne

src/install/installationManager.ts

@@ -382,7 +382,8 @@ export class InstallationManager implements HasTelemetry {
       await installation.virtualEnvironment.installComfyUIRequirements(callbacks);
       await installation.virtualEnvironment.installComfyUIManagerRequirements(callbacks);
       await this.warnIfNvidiaDriverTooOld(installation);
-      await installation.virtualEnvironment.ensureRecommendedNvidiaTorch(callbacks);
+      // Disabled forced PyTorch upgrades - users should control when large package downloads occur
+      // await installation.virtualEnvironment.ensureRecommendedNvidiaTorch(callbacks);
       await installation.validate();
     } catch (error) {
       log.error('Error auto-updating packages:', error);