[tyza66]

The session management page asked for a source directory path, so importing a Codex, Claude Code or ZCode store meant knowing where that Agent keeps its sessions on this machine and typing the path by hand. The page now asks which Agent to import instead: the Host detects the installed stores and the section offers them in one dropdown with the Import button beside it.

• listAgentSessionSources holds the fixed home-directory layout of each foreign Agent and marks one installed only when its marker paths exist, so an Agent that was never run here offers nothing instead of an import that refuses every session.
• Alpha's own store leads the list and reads the deployment-configured root, so a configured root outside the default layout stays the one this import opens. Detection never opens a Session; the import re-detects the format of whatever root the caller picked.
• The list reaches the Client through a new harnessSessionSources remote and the sessionSources client method. Only detected installations appear as options, the selection stays disabled until at least one is, and the section shows a detecting state and an empty state.
• Docs (EN/zh), the config and persistence catalogs, and the Cordis API catalog are regenerated in the same change.

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[tyza66]

CI verdict on this branch

All 33 check-runs finished: 19 success, 10 skipped, 4 failure. The 4 red lanes are pre-existing and reproduce identically without this change.

Why this PR exists: ci.yml triggers only on pull_request, so the full gate suite (coverage, static, snapshots, Windows lanes) never runs on a direct push to main.

1. No green ci.yml run exists in this repository. All 16 historical runs ended failure or cancelled. node 24 / coverage, node 24 / snapshots and artifacts, and windows node 24 / coverage failed on every one of them, including runs from 2026-10-07.

2. Coverage lane, compared against the immediately preceding PR run (fac2ce6b80, 2026-10-23 04:02 UTC, job 120233546760, which does not contain this change):

• The same 57 .client.spec files fail to load there with Failed to resolve import "@mutantcat/dsh-llm/error" from "packages/client/ui-chat/src/client/chat/MessageItem.tsx". That resolution error is what empties the coverage of the hundreds of files the gate then reports at 0%.
• ImportSessionsSection.tsx was already below threshold before this change (93.33% lines) and reads 93.65% after it.
• harness-import.ts was already below threshold (76.92% lines) and reads 81.25% after it.

So this change moves both files it touches in the right direction and introduces no uncovered code of its own.

3. Snapshots lane: the failing set is identical. 128 failing snapshot case names before this change, 128 after, matching one-for-one with zero added and zero removed. The root cause is recorded-machine-local <available_skills> entries committed into the fixtures, which CI runners do not have. minimal-preset.snapshot.ts and preset-migration.snapshot.ts fail for unrelated a11y-text and node-structure reasons on both sides.

4. Windows coverage lane: the same @mutantcat/dsh-llm/error resolution error, plus the pre-existing path-separator assertion at harness-import.host.spec.ts:348 that fails on Windows with or without this change.

This change's own tests pass on Windows too: agent-session-sources.host.spec.ts (4 tests) and components.client.spec.tsx (11 tests) are green in the Windows coverage log, alongside 18 green locally.

Why this is closed rather than merged

main already carries this change as 29fd1c2d3e, whose tree is identical to this branch's. Merging would add a merge commit that pulls the duplicate cherry-pick into main's first-parent history for no content gain, so the branch is being retired instead. The run above is the record of the full gate suite against this change.