Review follow-up on 56f24e1:
1. moveSpecPanelToTop's collapse detection was too sensitive: a normal
scroll-to-top on a multi-dimension panel can legitimately drop the
heading count (a lower heading scrolls out of view) without losing
any spec values. SPEC_PANEL_TOP_COLLAPSED is now only raised when
every collected spec dimension value vanishes (count goes from >0
to 0) or the spec panel is no longer recognized as open
(!specPanelOpen or specPanelType == UNKNOWN). Heading count alone
no longer triggers it.
2. A collector failure during the purchase spec probe (e.g.
SPEC_PANEL_TOP_COLLAPSED) previously vanished into
collectPurchaseProbe returning null, so probeOutcome() reported
the generic PURCHASE_SPEC_NOT_MATCHED "商品规格探测失败" — the same
as an ordinary spec mismatch. collectPurchaseProbe now encodes a
failed collect() result (code + message) into the opaque probe
JSON via PurchaseSpecProbePolicy.encodeCollectorFailure, and
PurchaseSpecProbePolicy.demote (replacing demoteIfEmpty, kept as a
deprecated alias) surfaces it as an explicit
PURCHASE_SPEC_PROBE_FAILED failure with a purchaser-readable
message ("规格探测时规格面板被拖动，规格标题消失" for
SPEC_PANEL_TOP_COLLAPSED, a generic message naming the code
otherwise). This keeps PurchaseRehearsalExecutor's probeSpecs
callback contract opaque, so its existing unit tests are untouched.
Tests: PddProductDetailCollectorTest (heading count dropping while
dimensions remain present must not fail collection, still collects
colors/sizes), PurchaseSpecProbePolicyTest (encode/extract collector
failure, demote surfaces SPEC_PANEL_TOP_COLLAPSED and unrecognized
codes explicitly).
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NTDbDcwbDw1TSAcE6wfh2F
