feat: add adaptive Apple-style Codex taskboard

[zZ050894]

Summary

• add an adaptive Apple-style Codex Taskboard with light-first rendering and host-synchronized dark mode
• place Taskboard directly after Plugins in the Codex sidebar and preserve task/filter state across theme changes
• expose Todo, In progress, In review, Completed, and a dedicated Archive workflow
• support completed-task editing, continue-to-processing, archive/restore, automation settings, and truthful step-based progress
• fix project popover clipping, add the required 40px board spacing, and keep content surfaces solid and accessible
• update js-yaml to 4.3.1 to resolve the current high-severity audit finding

Why

Long Codex conversations make feature history difficult to track. This change turns work into a structured, cross-conversation task flow while keeping the interface visually consistent with the current macOS/Codex light and dark appearances.

Validation

• npm run typecheck — passed
• npm run build:web — passed
• loopback-only safety suite — 482 tests, 477 passed, 0 failed, 5 policy skips
• Playwright + Axe — 16/16 passed; no serious or critical findings on required light/dark surfaces
• npm audit — 0 vulnerabilities
• privacy scan — no credentials, private keys, personal absolute paths, databases, or DMG artifacts in the public branch

Delivery boundary

This PR delivers verified source/userscript integration and sanitized QA artifacts. It does not claim or include a newly signed macOS application or DMG.