test(export-cmd): assert new compress panel block-span format (issue #385)

[ranxianglei]

Problem

Master test suite red: node --import tsx --test tests/export-cmd.test.ts → 7 fails, all error: 'compress created a block'.

Root cause

Merge-order interaction between two PRs:

1. feat: add /acp-export command (session handoff export) #272 (acp-export command) landed first; its setupSession helper at tests/export-cmd.test.ts:89 asserted the old panel format /1 block/ (… (~N reclaimed, 1 block)).
2. feat: report new block ids and actual ref spans in compress result panel (#376) #377 changed the panel line to … blocks: b1=mXXXXX–mYYYYY (blockSpanLabel, src/compress-tool.ts:499) and updated four test files — but missed tests/export-cmd.test.ts.
3. The feat: report new block ids and actual ref spans in compress result panel (#376) #377 branch was based on pre-feat: add /acp-export command (session handoff export) #272-merge master, so its CI never ran this file; after both merges master went red.

Verified on master (2bdc831): reproduced all 7 failures before the change.

Fix

One line in tests/export-cmd.test.ts:89: assert the new format using the sibling convention from #377 (/blocks: b\d+=/, same as tests/decompress-cmd.test.ts:85 which carries the identical assertion message). The helper compresses only m00002 so span detail does not affect the match.

Remaining /1 block/ strings in other tests are intentional legacy-parsing coverage (old panel lines replayed from session logs) and were left untouched.

Verification

• node --import tsx --test tests/export-cmd.test.ts → 10 pass / 0 fail (was 3 pass / 7 fail)
• npm test → 725 tests, 722 pass, 0 fail, 3 skipped (pre-existing skips)
• npm run typecheck clean; npm run build success

Fixes #385

[github-actions]

📦 Built Extension Artifact

Branch: 2026-09-12_fix-export-cmd-test-format (8e78c1c)

Option A — Install from npm PR tag (recommended)

pi install npm:billion-context-pi@pr-388

Each push to this PR publishes a new version under the pr-388 npm tag.

Option B — Download artifact

1. Download the artifact from the Actions run
2. Extract the tarball and install:

tar xzf billion-context-pi-pr388.tgz
pi install ./package

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This comment is automatically updated on each push.

[ranxianglei]

[bot] 🏷 Closing as duplicate of #386.

Both PRs fix the same line (tests/export-cmd.test.ts:89, /1 block/ → new panel format) for issue #385. #386 was opened first (06:52Z) and uses the exact regex suggested in the issue body (/blocks: b1=/), so it takes precedence over this later PR (opened 06:58Z by an earlier bot session on #385 that didn't detect the existing PR — duplicate screening miss on our side).

#386 is verified green locally: tests/export-cmd.test.ts 10/10, full suite 725 tests / 722 pass / 0 fail / 3 pre-existing skips, typecheck + build clean. Please merge #386 instead.