Remove all Lightning/zap code, rename to Pulse ZERO v1

[joeynyc]

Summary

• Remove all NIP-57 Lightning zap support (BOLT11 parsing, LNURL service, wallet integration, zap UI, ZapSecurityGuard) since payments involve legal considerations
• Keep Nostr identity and transport intact — they power messaging, not just payments
• Rename project to Pulse ZERO v1 — a pure decentralized messaging app
• Fix pre-existing build issues: missing pbxproj entries for 7 source files, MCSessionDelegate conformance, DebugLogger category, animation syntax

What was removed

15 source/test files deleted (~3,100 lines):

• Zap.swift, ZapManager.swift, LNURLService.swift, Bolt11Parser.swift, Bolt11Validator.swift, ZapSecurityGuard.swift, AmountGuard.swift, WalletURISanitizer.swift
• ZapButton.swift, ZapAmountSheet.swift, ZapDisplayView.swift
• Bolt11ParserTests.swift, Bolt11ValidatorTests.swift, ZapSecurityGuardTests.swift, WalletURISanitizerTests.swift
• BITCOIN_PLAN.md

Zap references cleaned from 8 source files:

• NostrTransport.swift — removed zap event kinds, zap callbacks, zap publish/subscribe methods, lightningAddress from metadata
• NostrEventValidator.swift — removed validateZapRequest(), validateZapReceipt()
• PulsePeer.swift — removed lightningAddress, canReceiveZaps
• ChatView.swift — removed zap UI (ZapDisplayView, ZapAmountSheet, ZapDetailsSheet)
• ProfileView.swift — removed lightning address field and metadata publishing
• SettingsView.swift — removed wallet picker, zap amount picker, lightning section
• MeshManager.swift — removed lightningAddress from demo peers
• SecureNetworkSession.swift — removed createLNURLSession()

What stays untouched

• Nostr identity (secp256k1 signing) and relay transport — powers messaging
• Mesh networking (BLE + MultipeerConnectivity)
• Location channels, encryption, all security hardening
• ErrorManager scrub regex for lightning strings (defense-in-depth)

Test plan

• xcodebuild build succeeds (0 errors)
• xcodebuild test — all tests pass except 2 pre-existing failures unrelated to this change
• grep -ri "zap\|bolt11\|lnurl" only matches ErrorManager scrub regex and its tests

🤖 Generated with Claude Code