v3.1-dev: AI-Audited Terminal UI Overhaul

🧠 Multi-Agent AI Audit + Claude-Style Terminal UI

16 AI agents analyzed, fixed, and enhanced this script across 3 rounds.

🔧 Bug Fixes (CRITICAL → LOW)

• DWORD overflow: NetworkThrottlingIndex ([int]-1) → 4294967295 (0xFFFFFFFF)
• IPv6 detection regex tightened (was matching MACs and port numbers)
• Polish regex patterns anchored (false-positive substring matches)
• Backup validation: aborts optimization if backup creation fails
• Restore-FromBackup crash guards: index bounds, JSON parse safety, adapter name from JSON
• Pre-Win8.1 graceful exit instead of Get-NetAdapter crash
• All exit calls → return (dot-source safe, no longer kills console)
• Dot-source guard wrapped around entire main execution
• .bat: input validation, stale env vars, admin check, CRLF docs, -All warning

🎨 Claude Code-Style Terminal UI

• ANSI truecolor Unicode banner: rounded box ╭─╮ + gradient text
• 6-frame spinner animation (·✻✽✶✳✢) at every optimization phase
• Unicode status symbols: ● OK, ○ applying, ◆ warning, ● error, ✦ tip
• Progress bars: ████░░░░ 75% during multi-adapter optimization
• Mode-aware ASCII art: ⚡Throughput / 💎LowLatency / ⚖Balanced
• Gradient text: per-character RGB interpolation (orange → gold)
• Unicode box sections: ╭── PHASE 1 ──╮ instead of ASCII +===+
• Pulse-dot animation during MTU binary search (~30s phase)

🆕 New NIC Vendor Patterns (16 added)

Intel ITR/Interrupt Throttle Rate, Killer GameFast/Stream Detect, Realtek Idle Power Saving/PCIe, Broadcom VMQ/SR-IOV, Gigabit Master Slave — all mode-specific

📦 What's New

• CHANGELOG.md (178 lines)
• .gitattributes (CRLF enforcement for .bat/.ps1)
• Updated README (compatibility, line count, one-liner fix)
• LICENSE year: 2025-2026
• 1733 lines (+279 from v3.0), 114-line .bat

⚠️ Dev Test Release

This is a development test release — 16 autonomous AI agents modified this code.
Thoroughly tested on Linux (dry-run analysis), but not yet tested on live Windows.
Please test on real hardware before production use.