AgentBoot v1.2: faster runtime and redesigned web

[bit-cook]

Summary

• redesigns and unifies the Chinese/English Pages and Worker web surfaces with responsive, accessible, dependency-free assets
• speeds repeated CLI startup, model reconnects, and multi-Agent npm installs while removing duplicate installer work
• adds deterministic performance benchmarking, generated web-asset parity checks, slimmer runtime packages, and v1.2.0 release metadata

Performance evidence

• cached launcher: warm menu startup 87.9ms → 57.4ms; first cold launch 105.6ms → 101.7ms
• deferred menu HTTP stack: alternating A/B composite fixed overhead improved 79.13 → 70.93; menu version 164.5ms → 114.7ms
• installer: removes one duplicate ~2.10s post-install doctor pass
• model requests: 3,328B → 3,156B typical tool request; TLS reconnect avoids ~8.5ms context recreation
• online packages: tar -15.9%, zip -15.0%

Verification

• 151 Python tests pass
• Python, shell, JavaScript, actionlint, generated web assets, package SHA-256, and diff checks pass
• real Chromium QA at 1440px desktop and 375px Chinese/English mobile widths with no horizontal overflow
• v1.2 online packages contain core/launch.py and exclude deploy/benchmark-only files