v0.3.5 companion presence and visible memory

[FanyinLiu]

v0.3.5 Theme

Visible memory, readable companion presence.

This PR is intentionally about making Nexus feel more like a desktop companion, not expanding it into a Codex-style work agent. Users should remember v0.3.5 as the release where Nexus starts showing what it remembers and what state the desktop companion is in.

What users will notice

• Settings home now shows the v0.3.5 release spotlight immediately, so users do not have to hunt through About / Help to learn what changed.
• The root README, English release notes, Chinese release notes, CHANGELOG, and in-app spotlight now tell the same human-facing story: visible memory plus readable companion presence.
• The spotlight has direct actions to Memory and Companion Profile, letting users inspect the two headline upgrades without starting chat, voice, network, migration, or automation work.
• Companion Profile now includes a desktop state preview for idle, thinking, listening, speaking, waiting, error, and offline.
• The desktop pet state is readable across status dot, accessible label, Sprite fallback, and Live2D listening/speaking inputs.
• The companion now has lightweight CSS motion tokens for breathing, thinking, listening, speaking, and waiting, without adding background work or dependencies.
• Known stage directions like (eyes brightened), (blush), and (nod) can drive avatar cues while ordinary notes and Markdown links remain untouched.

Engineering summary

• Add a pure companion activity resolver for idle, thinking, listening, speaking, waiting, error, and offline states.
• Bind pet status, Sprite fallback, Live2D inputs, and Companion Profile preview to the shared state contract.
• Sync the v0.3.5 in-app spotlight, release notes, README snippets, roadmap, and changelog around the memorable theme: visible memory plus readable desktop companion states.
• Cut the v0.3.5 presence/spotlight entries from Unreleased into the [0.3.5] changelog section, leaving Unreleased explicitly empty for later work.
• Add docs/RELEASE-CANDIDATE-v0.3.5-HANDOFF.md plus a focused guard so the final merge/tag handoff keeps the memorable upgrade, evidence, residual risks, rollback path, and companion-not-agent boundary explicit.
• Share the release spotlight action renderer between Settings home and About / Help so both entry points stay aligned as the release candidate evolves.
• Guard the README/release-note/changelog/handoff theme with tests/release-spotlight.test.ts, so the 0.3.5 message cannot drift back to a memory-only, unreleased, or task-agent story unnoticed.
• Align docs/RELEASING.md Stage B with the actual packaged smoke gate and make npm run distribution:audit fail if npm run package:dir:smoke or the quick-mode packaged-smoke skip note drops out of the release checklist.
• Add an Electron visual smoke gate that launches the built completed-onboarding pet view, rejects onboarding-overlay false positives, confirms idle/breathe presence, and saves a nonblank screenshot/report under output/presence-smoke/.
• Keep the PR scoped: no new dependencies, IPC channels, storage writes, migrations, permissions, automation tools, or renderer access to secrets.

Validation

• npm run lint
• npm run i18n:audit — 2242 keys, 0 missing/extra/duplicate across zh-CN, zh-TW, en-US, ja, ko.
• npx tsc -b --pretty false
• npm run build
• npm test — 1966 passed.
• npm run distribution:audit — includes the packaged smoke release-doc and quick-mode guard.
• node scripts/prerelease-check.mjs v0.3.5 --only=B --quick — verify:release and bundle checks passed; output explicitly states packaged smoke is skipped in quick mode.
• node scripts/prerelease-check.mjs v0.3.5 --skip=A --quick — tag-safe branch preflight passed stages B-F: 22 blocker checks, 0 warnings, 0 failures. Stage A intentionally waits for merge to main because it verifies HEAD === origin/main and tag absence.
• npm run release:trust:audit — 7 OK, 2 expected warnings for unsigned macOS/Windows release posture.
• npm run package:dir:smoke — builds, packages a local dir app, launches packaged Nexus, and exits after renderer load.
• npm run pet:presence-smoke — runs build, launches the Electron pet view, and writes output/presence-smoke/pet-presence-smoke.png plus JSON evidence.
• Focused pet activity test: node --experimental-strip-types --test tests/pet-activity-state.test.ts
• Focused release spotlight test: node --experimental-strip-types --test tests/release-spotlight.test.ts — 5 passed, including README/release-note/changelog theme alignment and the v0.3.5 release handoff guard.
• Whitespace gate: git diff --check
• GitHub CI: Windows, macOS, and Ubuntu all passed on latest head e87d9dc.

Release wording

Use this for the human-facing 0.3.5 headline:

Nexus v0.3.5 makes the companion easier to read and remember: memory is visible, and the desktop avatar now shows whether it is idle, thinking, listening, speaking, waiting, offline, or in trouble.