fix(windows): restore indexed descendant row walk

CLAUDE-GROUPED-QUESTION-P1-REPORT.md

@@ -1,51 +0,0 @@
-# Claude grouped-question P1
-
-## Outcome
-
-Implemented the narrow renderer/native-chat fix on top of integrated parent
-`256d037d2bc73fbbc812082124e43d064213a391` (the child commit SHA is recorded
-after commit). Claude structured question items now retain every grouped
-question, per-question multi-select state, per-question free-text capability,
-and one shared grouped-answer payload; legacy single-question journal rows keep
-their existing option/free-text route.
-
-## Reproduction and coverage
-
-The first red reproduction was `NativeChatQuestionCard > applies free-text
-capability per question in a grouped prompt`: the pre-fix card treated a
-boolean-array capability as truthy and rendered free text for a listed-only
-question. Focused coverage now includes grouped card rendering and answer
-selection, shared grouped-answer encode/decode and validation, grouped
-multi-select Claude callback settlement, and legacy single-question routing.
-
-## Verification
-
-- Focused Claude/native-chat/shared Vitest: 152 files passed, 1,447 tests
-  passed, 2 skipped.
-- Node typecheck: `tsc --noEmit -p config/tsconfig.node.json` passed.
-- Web typecheck: `tsc --noEmit -p config/tsconfig.tc.web.json` passed.
-- Changed-file native and type-aware oxlint passed with no warnings.
-- Changed-file `oxfmt --check` passed.
-- `pnpm-lock.yaml` is byte-identical to the parent baseline and is not part
-  of the change.
-
-## Files
-
-- `src/renderer/src/components/native-chat/NativeChatQuestionCard.test.tsx`
-- `src/renderer/src/components/native-chat/NativeChatQuestionCard.tsx`
-- `src/renderer/src/components/native-chat/NativeChatStructuredSession.test.tsx`
-- `src/renderer/src/components/native-chat/NativeChatStructuredSession.tsx`
-- `src/shared/agent-session-question-answer.test.ts`
-
-## Readiness notes
-
-The change only consumes the established journal grouped-question shape and
-shared answer codec; no RPC/stream opcode, lease/fence, journal identity,
-provider session/leaf, stale-tail, restart/reconnect, SSH, or platform wire
-contract was changed. No mobile-facing source was touched; existing mixed
-version behavior remains additive through the journal's optional `questions`
-field and the legacy top-level projection.
-
-Residual risk: a live Electron/Claude TUI run was not requested for this
-implementation; the adapter and renderer contract tests cover the provider
-callback and answer payload boundaries.

src/main/providers/windows-foreground-process-rows.ts

@@ -124,10 +124,11 @@ export function windowsDescendantsFromRows<Row extends { pid: number; ppid: numb
   rows: Row[],
   rootPid: number
 ): (Row & { depth: number })[] | null {
-  if (!rows.some((row) => row.pid === rootPid)) {
+  const index = getProcessTableIndex(rows)
+  if (!index.byPid.has(rootPid)) {
     return null
   }
-  return collectDescendants(rows, rootPid).sort((a, b) => b.depth - a.depth)
+  return collectDescendantsFromIndex(index, rootPid).sort((a, b) => b.depth - a.depth)
 }
 
 /** Test-only: clear the shared snapshot so one case's rows never serve the next. */