[DoodleBears]

Requested by Vain.

Why the change

Name browser connections as Remote Hosts and prepare the shared Host Feed so the next slices can reuse one Inbox and authenticated avatar cache / 统一本机与远程的名称，并为后续切片提供共享的收件箱与头像缓存。

Refs #2500; implements Track 0 only, after #2505 and #2506.
Agent claim · codex/local/01a15ebb-a278-7f21-8363-dd343bbf7c0f

Special things to note

• Merge risk: small blast radius, limited to this browser's Remote Host projection; Host data and device authority stay unchanged. Reverting code is straightforward, but a rollback must copy the renamed browser storage keys back or re-pair. Review migration failure handling, final-subscriber disposal, late image completions and object-URL cleanup. Browser-owned storage remains the existing CLI exemption; the inventory includes its key migration, with no new Host route or setting / 评审重点是旧配对迁移和资源释放；回退须反向复制浏览器存储键或重新配对。
• Verification: pnpm typecheck, pnpm lint, pnpm format:check, pnpm build and 8 focused Vitest files (138 tests) pass. Two isolated local Windows Hosts: the baseline browser pairs Studio; upgrading preserves the pairing and selected tab, reads humanAttention and channelUnreadCounts through the device gateway (HTTP 200), and opens the remote conversation. Light/dark captures inspected; successful baseline and upgrade drives have zero console warnings/errors. Earlier driver failures and a premature-start 404 were retained separately. No live model call or Human QA is claimed / 双 Host 本地升级路径已验证，未声称模型或人工验收通过。
• CI test plan: full, because the renamed Client file prevents tracing old importers; no selection rule changed. The handoff reports main failures in workspace-grant-roundtrip.test.ts and client-observer.test.ts from node:sqlite bundling; the focused run does not claim to resolve them. Known gaps: remote chat still has text and attachment names only, without images/cards; Host icon/colour remain per phone; DSH Desktop is unqualified; no two-physical-machine real-tailnet test / 四项缺口保留，Tracks 1–4 在本 PR 合并后启动。

Change outline

RemoteHosts (browser-owned)
  first subscriber → shared HostClient + createInbox({ activity: true })
  roster → device-authenticated image loader → immutable avatars map
  last subscriber / remove → stop Inbox + client, release obsolete image URLs
  old storage keys → remoteHosts.v1 + hostTab.v1 (pairing and selection retained)

computer-sources → remote-hosts; ComputerTabs → HostTabs; locale keys → remoteHosts.*. This Host still uses its existing bridge/store in this slice. The new Inbox/avatar snapshots are scaffolding; their visible row features follow in separate PRs.

Tabs — 1440 × 900 viewport, same paired Hosts, This Host selected; sidebar crop. The machine label becomes This host (Chinese: 本机).

Before, light:

After, light:

Before, dark:

After, dark:

Add remote replaces Add computer; Chinese uses 添加远程. The existing dialog and tokens are reused.

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Reviewing files that changed from the base of the PR and between 2b82975 and 63a2391.

⛔ Files ignored due to path filters: 6

• .github/pr-screenshots/2500-t0/after-add-light.png is excluded by !**/*.png
• .github/pr-screenshots/2500-t0/after-dark.png is excluded by !**/*.png
• .github/pr-screenshots/2500-t0/after-light.png is excluded by !**/*.png
• .github/pr-screenshots/2500-t0/before-add-light.png is excluded by !**/*.png
• .github/pr-screenshots/2500-t0/before-dark.png is excluded by !**/*.png
• .github/pr-screenshots/2500-t0/before-light.png is excluded by !**/*.png

📒 Files selected for processing: 15

• .agents/skills/dsh-dev/SKILL.md
• .agents/skills/verify-deepseekbot/features/README.md
• .agents/skills/verify-deepseekbot/features/remote-hosts.md
• changes/2500-host-feed.md
• docs/architecture/botharness-architecture.md
• packages/client/src/client/bot-sidebar.tsx
• packages/client/src/client/channel-dock.tsx
• packages/client/src/client/host-tabs.tsx
• packages/client/src/client/locale.ts
• packages/client/src/client/remote-conversation-view.tsx
• packages/client/src/client/remote-hosts.ts
• packages/client/test/computer-sources.test.ts
• packages/client/test/remote-hosts.test.ts
• scripts/cli-ui-inventory.json
• scripts/verification-inventory.json

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