[luannn010]

Summary

• Add live sidebar resizing from 180–420px, a device-local width preference, keyboard steps and reset controls.
• Retain narrow drawers and native collapse; truncate long labels while keeping counts and accessible names.
• Implements Notes sidebar-dragging / Components window-title-row, design revision 95bd47e899600c0f038a7d4622a40cfc61d063e2. Depends on test(journal): verify encrypted habit feedback journeys #53.

Testing

• 56 focused tests, TypeScript and production build passed; independent lead source review accepted.
• Hosted web: 826 passed, one opt-in skip. Local full run: 825 passed, one graph stress timeout; that case passed alone within its unchanged 30-second limit.
• Real WASM/IndexedDB browser journey passed pointer bounds, keyboard/reset, encrypted reload, storage denial, three themes, reduced motion and narrow layouts.
• Not tested: installed-native physical input, FPS and whole-frame fidelity.
• Risk: presentation preference only. Revert this PR to undo; no stored-note migration.

Co-authors

none

AI usage

• Written by hand, with no AI
• Harness and version: Codex desktop, codex-cli 0.160.0; Git/gh, Node, Vitest, Playwright and installed Chrome.
• Models: gpt-6.1-sol (UI/UX specification, UI implementation, tests, integration and independent source review); gpt-6-luna (read-only Study/Journal gap inventory).
• Effort: medium.
• Human role: requested design comparison, fixes and focused PR delivery; merge review remains pending.
• Sources: project-owned approved design revision95bd47e899600c0f038a7d4622a40cfc61d063e2 and existing Notes source/test contracts. No external implementation copied; existing notices retained.

Checklist

• Works on Windows, macOS and Linux
• Architecture updated for device-local width behavior
• No secrets, profiles, screenshots or build outputs included