chore: update env vars for mainnet

[pwltr]

Description

• update environment variables for Bitcoin mainnet
• fix redundant setup calls for VSS client (it has lazy initialization when first backup is triggered)
• update app icon

[piotr-iohk]

It seems that app produces addresses with mainnet HRP even on local regtest docker backend, so e2e tests complain:

Error: Invalid Bitcoin address: bc1qe986tzg5rx5ccgzrcdctgqzk68ctvshkme5msr

[Copilot]

Pull request overview

This PR updates the Bitkit app configuration for Bitcoin mainnet deployment, refactors VSS client initialization, and updates the app icon. Key changes include switching the network configuration from regtest to mainnet, updating service URLs, adding proper network-specific keychain groups, and removing redundant VSS setup calls.

Key Changes

• Switched default network from regtest to Bitcoin mainnet with corresponding service URLs and trusted peers
• Consolidated environment variable logic with network-specific keychain groups
• Removed redundant VSS client setup calls (leverages lazy initialization)

Reviewed changes

Copilot reviewed 13 out of 28 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
Bitkit/Constants/Env.swift	Major refactor of environment configuration with mainnet URLs, network-specific keychain groups, and simplified server URL logic
BitkitNotification/BitkitNotification.entitlements	Added keychain access groups for different networks
Bitkit/Bitkit.entitlements	Added keychain access groups for different networks
Bitkit/Services/BackupService.swift	Removed redundant VSS client setup calls
Bitkit/Services/LightningService.swift	Refactored trusted peer configuration and added network graph logging
Bitkit/Services/CoreService.swift	Removed regtest-only restriction on activity removal
Bitkit/Utilities/AppReset.swift	Made log wiping conditional on regtest network
Bitkit/Views/Settings/LdkDebugScreen.swift	New debug screen for LDK operations
Bitkit/Views/Settings/DevSettingsView.swift	Added LDK debug option and reordered test notification button
Bitkit/ViewModels/NavigationViewModel.swift	Added ldkDebug route
Bitkit/MainNavView.swift	Added LdkDebugScreen to navigation
Bitkit/Views/Wallets/Activity/ActivityExplorerView.swift	Simplified block explorer URL generation
Bitkit/AppScene.swift	Improved error logging

Comments suppressed due to low confidence (1)

Bitkit/Services/LightningService.swift:1

• The isRestartingNode flag is not reset to false in the success case if an error occurs. It should be set to false in a defer block or both success and error paths to ensure proper cleanup.

import BitkitCore

[jvsena42]

Checked:

• Create fresh wallet
• onchain Address creation
• Blocktank peers connection
• Backup status

Not checked:

• send and receive operations

OBS: Could update the Readme with instructions of how to build to different networks

[ovitrif]

LGTM

Tested send and receive LN on existing wallet from previous version of the branch, where I did my original mainnet iOS testing.

Approved but strongly backing @jvsena42 's suggestion to update README with info for building for the different networks.

[ovitrif]

Actually we can amend README after merge in another PR…