chore(release): bump version to 0.9.0

[ewen-poch]

Summary

Release prep for v0.9.0. Bumps the single source of truth (package.json + package-lock.json) from 0.8.1 to 0.9.0 and updates the docs for what landed since v0.8.1 (22 PRs). This is a minor release: no breaking changes. It brings the first concrete slices of two roadmap phases into shipped form — personal specialist agent profiles with scoped capabilities (Phase 3) and durable scoped permission management with global, project, and session-scoped allow grants (Phase 4) — alongside conversation and artifact export, per-turn token usage, TIFF previews, collapsible side panels, and native Responses API support for DeepSeek flash.

Since v0.8.1 (headline)

• Personal specialist agents — reusable agent profiles with scoped capabilities, bound per session with identity from the first turn and hot-switching mid-conversation. (feat(specialist): add personal specialists with capabilities and session binding #530)
• Scoped permission management — global, project, and session-scoped allow grants with filtering, family revoke, and Undo. (feat(permission-management): add scoped permission management #533)
• Conversation export as Markdown and PDF — whole-conversation export through a normalized public model. (feat(conversations): export conversations as Markdown and PDF #531)
• Selective session-artifact downloads — download all or a subset of generated files per session. (feat(session-artifacts): add selective artifact downloads #534)
• Per-turn token usage — input / cache / output totals on the final agent message of each turn. (feat(workspace): show turn token usage #540, fix(agent-usage): aggregate complete prompt token usage #553)
• Native Responses API for DeepSeek flash — model-aware endpoint resolution routes deepseek-v4-flash natively. (feat(deepseek): add native Responses API support for deepseek-v4-flash #544)
• TIFF image rendering — TIFF support in the image preview. (feat(previews): add TIFF image rendering #529)
• Collapsible side panels — collapse left/right panels for more horizontal space. (feat(workspace): add collapsible side panels #523)

Changes

• package.json: 0.8.1 → 0.9.0
• package-lock.json: 0.8.1 → 0.9.0 (both root and packages[""])
• scripts/windows-installer-smoke.test.ts: version fixture updated
• README.md: release blurb and project status updated for v0.9.0
• ROADMAP.md: added specialists, scoped permissions, conversation/artifact export, TIFF previews, collapsible panels, and per-turn token usage to shipped features; updated Capability Map and Delivery Phases

Test plan

• CI will run the full test suite, typecheck, and lint.

[github-actions]

Codex Review

Verdict: mergeable

No actionable findings.

Summary: No concrete merge-blocking defects found. Version metadata is synchronized across package.json and package-lock.json; documentation and the Windows smoke-test fixture are consistent with the 0.9.0 bump. Static inspection only; no tests or project commands were run.