feat(reports): allow blob preview under CSP, expandable invoice items and deposit source allocation

[steilerDev]

Summary

• Widen the Fastify helmet CSP frameSrc directive to allow blob: so the report wizard's pdfmake-generated preview actually renders in its iframe (was silently blocked)
• Add expandable per-invoice budget-line/deposit rows to the report wizard's step-3 invoice list (ReportInvoiceList), backed by a richer SourceReportInvoice payload (budgetLines/deposits)
• Add invoice_deposits.budget_source_id (migration 0044) so a deposit can be tagged directly to a budget source, with a default-source-selection heuristic in InvoiceDepositsSection

Fixes #1891
Fixes #1892
Fixes #1893

Test plan

• Unit tests pass (95%+ coverage) — qa-integration-tester added/updated coverage for reportExclusions, ReportInvoiceList, InvoiceDepositsSection, depositAggregateUtils, budgetSourceService, sourceReportService, invoiceDepositService, migration 0044, helmetPlugin
• Integration tests pass
• CI Quality Gates pass (typecheck, tests, build, audit)
• E2E: e2e/tests/budget/reportWizardExpansion.spec.ts — real-browser verification of the hardened CSP blob: preview fix plus expandable rows and deposit source allocation

Co-Authored-By: Claude dev-team-lead (Sonnet 4.6) noreply@anthropic.com
Co-Authored-By: Claude backend-developer (Haiku 4.5) noreply@anthropic.com
Co-Authored-By: Claude frontend-developer (Haiku 4.5) noreply@anthropic.com
Co-Authored-By: Claude translator (Sonnet 4.5) noreply@anthropic.com
Co-Authored-By: Claude qa-integration-tester (Sonnet 4.5) noreply@anthropic.com
Co-Authored-By: Claude e2e-test-engineer (Sonnet 4.5) noreply@anthropic.com

[steilerDev]

[security-engineer] Security review of PR #1894 (story #1891 follow-up: report wizard CSP fix, deposit→budget-source tagging, richer source-report payload).

Verdict: APPROVED — no Critical/High findings. Two Informational notes below (non-blocking).

Scope reviewed

• server/src/plugins/helmetPlugin.ts (CSP frameSrc widening)
• server/src/routes/invoiceDeposits.ts, server/src/services/invoiceDepositService.ts
• server/src/db/migrations/0044_invoice_deposit_budget_source.sql, server/src/db/schema.ts
• server/src/services/sourceReportService.ts, server/src/services/budgetSourceService.ts, server/src/services/shared/depositAggregateUtils.ts
• client/src/pages/InvoiceDetailPage/InvoiceDepositsSection.tsx, client/src/components/reports/ReportInvoiceList.tsx

CSP frame-src widening

frameSrc: ["'self'"] → ["'self'", 'blob:'] (server/src/plugins/helmetPlugin.ts:18). Confirmed via diff that no other CSP directive changed — helmetPlugin.test.ts adds a test that pins every other directive's exact serialized value (script-src 'self', style-src 'self' 'unsafe-inline', img-src 'self' data: blob: — already had blob: pre-PR, connect-src 'self', object-src 'none', base-uri 'self', form-action 'self', no upgrade-insecure-requests) plus an exact-clause assertion for frame-src 'self' blob:.

This is appropriately scoped: blob: URLs can only be minted by script already running in an origin script-src trusts (unchanged, still 'self', no unsafe-inline/unsafe-eval), and the app has zero dangerouslySetInnerHTML/innerHTML/eval usage anywhere in the client (confirmed baseline, re-verified no new occurrences in this diff's changed files). The blob-generating code path (client/src/lib/reportPdf/sinks.ts, pdfmake output) is pre-existing and untouched by this PR — this change only unblocks a pre-existing, previously-silently-broken same-origin iframe preview. Widening frame-src (not script-src/default-src) keeps the blast radius minimal even under a hypothetical future XSS.

invoice_deposits.budget_source_id (migration 0044)

• Nullable FK, ON DELETE SET NULL, no backfill — matches the PR description.
• Verified FK enforcement is actually active on the production connection: server/src/plugins/db.ts never calls db.pragma('foreign_keys = ON') itself, but this repo's pinned better-sqlite3 (v12.11.1) ships compiled with SQLITE_DEFAULT_FOREIGN_KEYS=1 (confirmed empirically — fresh connection, pragma reads 1 with no code touching it). migrate.ts's foreignKeysDisabled() wrapper only fires for pending migrations, so on a steady-state restart nothing in this repo's code re-asserts the pragma — enforcement holds only because of the driver default. 0044_invoice_deposit_budget_source.test.ts explicitly proves the ON DELETE SET NULL behavior (deposit row survives, budget_source_id becomes NULL, not a cascade delete) with the pragma set the same way production ends up with it. I've corrected a stale note in my own agent memory that had mis-attributed this to an explicit db.ts pragma call — worth a defense-in-depth follow-up (db.pragma('foreign_keys = ON') in db.ts) so this doesn't silently regress if the SQLite driver is ever swapped, but I'm not filing it as a finding against this PR since current behavior is correct and this diff didn't introduce the gap.
• Reference-injection / IDOR surface: budgetSourceId is FK-only validated (no service-level existence check before insert/update — same "let the DB constraint reject it" convention already used by workItemBudgetService). An authenticated user (member or admin — this app is single-household/single-tenant, both roles trusted per the established RBAC model, matches the unchanged if (!request.user) throw new UnauthorizedError() guard on all four deposit routes) can only ever cause a 404-adjacent FK failure by naming a nonexistent source id, never read or write another household's data (no cross-tenant boundary exists in this app). Not exploitable.

Extended source-report response (budgetLines[] / deposits[])

• server/src/services/sourceReportService.ts: the new deposits[] array is explicitly filtered per-invoice to d.budgetSourceId === null || d.budgetSourceId === sourceId before being placed on the response — a deposit tagged to a different budget source is never exposed in another source's report. sourceReportService.test.ts (lines ~785-849) has an explicit two-source (sourceA/sourceB) test proving this isolation. Rail A (line-derived, excluding tagged deposits) and Rail B (deposit-direct) are summed without double-counting (splitByDepositsExcludingTagged / sumTaggedDepositContributions* explicitly skip deposits with a non-null budget_source_id on the line-derived side).
• All new/modified queries use Drizzle sql\...${param}...` tagged templates throughout (depositAggregateUtils.ts, budgetSourceService.ts, sourceReportService.ts, invoiceDeposits.ts` route schemas) — confirmed parameterized, no string concatenation, no injection surface.

Informational (non-blocking)

1. Unhandled 500 on invalid budgetSourceId — invoiceDeposits.test.ts (new test, "POST with a number budgetSourceId is coerced...and then fails the FK constraint as an unhandled 500") explicitly pins that a garbage-but-schema-valid budgetSourceId currently surfaces as a raw INTERNAL_ERROR 500 rather than a clean 400/404, because there's no app-level existence check ahead of the FK constraint. errorHandlerPlugin hides the raw SQLite error message in production (nodeEnv === 'production' → generic "An internal error occurred"), so there's no information disclosure, and this exactly mirrors the already-accepted workItemBudgetService convention (see my prior review notes on invoiceService.ts:131-139). Worth a follow-up story to add a shared "verify FK target exists" helper across these services for cleaner API error UX, but it's a data-integrity/DX gap, not a security bypass.
2. FK-enforcement dependency on driver default — see the db.pragma('foreign_keys = ON') note above. Suggest filing a small defense-in-depth follow-up independent of this PR.

Co-Authored-By: Claude security-engineer (Sonnet 4.6) noreply@anthropic.com

[steilerDev]

[product-architect]

Architecture Review — PR #1894 (Story #1891 / bugs #1892, #1893)

VERDICT: CHANGES_REQUIRED — 1 critical financial-correctness defect in the dual-rail aggregation. Everything else in the PR is well-built; the fix is localized to ~6 lines in one function.

---

CRITICAL — Rail A + Rail B double-count a tagged deposit when its invoice also has budget lines

splitByDepositsExcludingTagged() (server/src/services/shared/depositAggregateUtils.ts) drops tagged deposits entirely — including from the totalDepositTypeAmount sum that produces residualFraction. The residual therefore re-absorbs the money the tagged deposit represents, and Rail B then adds that same money a second time.

The unit test at depositAggregateUtils.test.ts:1372 states this outright — "residual reverts to 1" — and asserts it as intended behaviour.

I verified it empirically. Invoice €1000 / status paid, one budget line of €1000 to source S, one deposit of €400 status claimed tagged to S, budget-overview slice (all four statuses):

LEGACY  computeStatusContributionByInvoice     → 1000   (residual 0.6×1000=600 @paid + 0.4×1000=400 @claimed)
NEW     Rail A = 1000  Rail B = 400  COMBINED  → 1400   ← for a €1000 invoice

Blast radius — every consumer of the new pair:

• budgetSourceService.computeClaimedAmount / computeUnclaimedAmount — inflated source rollups on Budget and Manage pages
• budgetSourceService.computeDiscretionaryInvoiceAmount — same defect via the unallocated-remainder path
• sourceReportService.getSourceReport — inflated invoices[].allocatedAmount and totalAmount. This is the number that goes to the bank, and it can now exceed the invoice's own invoiceAmount.

This is the happy path, not an edge case. Story #1893's default heuristic pre-selects the picker to the invoice's own budget-line source. So the most ordinary flow — open an invoice that has budget lines, add a deposit, accept the pre-filled source, save — lands exactly here.

Why the test suite did not catch it: the only combined-rail test, budgetSourceService.test.ts:3149 "Rail A (line) + Rail B (tagged deposit) combine additively for the same source", deliberately places the tagged deposit on a different invoice (insertTaggedDeposit(otherInvoiceId, …), line 3179-3185). The same-invoice case — line to S and deposit tagged to S — has no coverage anywhere in the PR.

Fix direction. A tagged deposit still represents money paid against its invoice; it must stay in the residual denominator and only lose its pro-rata line apportionment. In splitByDepositsExcludingTagged, keep tagged deposits when accumulating totalDepositTypeAmount, and emit depositFractions entries only for untagged ones. With that change the example above yields Rail A 600 + Rail B 400 = 1000, and the tagged €400 still counts 100% to S rather than being pro-rated — which is precisely what AC #4 asks for. The budgetLines[].allocatedPortion values follow automatically, since they are derived from the same split.

Please also add coverage for the same-invoice mixed case at all three levels (depositAggregateUtils, budgetSourceService, sourceReportService), with the invariant Σ contributions across all sources and all status slices ≤ invoiceAmount.

---

Medium

M1 — N+1 queries reintroduced in getSourceReport. Step j issues one SELECT … FROM invoice_deposits WHERE invoice_id = ? per invoice inside a loop; step d issues two more per Rail-B-only invoice (invoice fetch + vendor lookup). The same function batches document links precisely to avoid this, with the comment "once, not per-invoice" — the new code regresses an explicitly-established local pattern. A single inArray(invoiceDeposits.invoiceId, allInvoiceIds) and one batched vendor join would restore it. Tolerable at current scale, but it should not be the pattern the next report feature copies.

M2 — household dropped from the regeneration effect's dependency array (ReportWizardPage.tsx), behind an eslint-disable @eslint-react/exhaustive-deps. regeneratePdf still closes over household, but the effect no longer re-fires when it changes. If the household-settings fetch resolves after reportStatus becomes ready, the PDF renders without household data and never regenerates. Ordering makes this unlikely in practice, but it is a real latent hole. Same applies to t/formatters: switching locale mid-wizard used to regenerate the PDF (via regeneratePdf in the old dep array) and no longer does. The loop-breaking motivation is sound and the comments are good — please either add household back to the effect deps (it is a raw input, not a derived memo, so it does not reintroduce the loop) or document the trade-off explicitly.

M3 — An invoice can vanish from the report entirely. The new unallocatedInvoices query excludes any invoice with a deposit tagged to this source. But if that deposit's status falls outside the report's slice, combinedContributions rounds to 0 and the invoice is dropped by if (roundedAmount === 0) continue. Net effect: an invoice that previously appeared under "unallocated" now appears nowhere. The NOT EXISTS guard should be narrowed to deposits whose status is within targetStatuses.

---

Low

• L1 — new Set([status === 'claimed' ? 'claimed' : 'paid']) in computeDiscretionaryInvoiceAmount is just new Set([status]) written in a way that silently mis-buckets any future third status. Prefer the direct form.
• L2 — The allocatedInvoices filter is now effectively always-true (budgetLines.length > 0 || deposits.length > 0 holds for everything the server returns, and the server already drops zero rows). Correct fix for Fully-excluding all budget lines on an invoice makes it disappear from the report wizard's step-3 list #1892, but the predicate no longer carries meaning — worth a comment or a simplification.
• L3 — applyLineExclusions runs inside a render IIFE rather than a useMemo. The strict no-op on the empty set keeps this cheap and referentially stable in the common case, but once exclusions exist it allocates a fresh report object every render. The effect no longer depends on the memo, so useMemo is now safe and preferable.

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Verified and endorsed

• Additive-only property holds. depositAggregateUtils.ts is a single append hunk at EOF (@@ -467,3 +467,258 @@), zero deletions. All six legacy exports are byte-identical, and the regression: untagged fixtures produce byte-identical output tests pin new-vs-legacy equivalence on untagged data. This is exactly the right containment strategy, and it is why the defect above cannot affect existing deployments until a user first tags a deposit. The cost is ~200 lines of near-duplicated logic that must now be fixed twice — acceptable for one story, but please open a follow-up to collapse the pairs behind a single options.excludeTagged parameter once this has soaked.
• Migration 0044. Correct SQLite form: ADD COLUMN … REFERENCES … ON DELETE SET NULL is legal only because the column is nullable with an implicit NULL default, which it is. Index added, Drizzle schema matches the DDL exactly, no backfill per AC. ON DELETE SET NULL correctly degrades a tagged deposit back to pro-rata when its source is deleted.
• CSP change is minimal and correct. frameSrc gains blob: and nothing else is touched. Critically, connect-src was not loosened to make the E2E test easier — the right call, and the reasoning is recorded in the POM.
• E2E hardened-preview technique is architecturally sound. Three attempts, each dead end documented in the ReportWizardPage.ts docstring: page.frames() navigation fails because headless-shell ships no PDF viewer (frame never completes, no violation fires — so the check passes on broken and fixed builds); fetch(blobSrc) fails because connect-src 'self' legitimately blocks it. The landing technique — direct assertion on the response's frame-src directive, plus zero CSP-violation console messages as defense-in-depth — satisfies the AC that actually matters ("run against the pre-fix CSP, then it fails"), since the header assertion is deterministic in both directions and browser-independent. It does not literally prove the frame paints, which is unachievable in headless-shell; that limitation is stated plainly in the docstring and captured in the e2e-test-engineer memory files added here. Endorsed as-is.
• Wiki updated in the same PR. API-Contract.md and Schema.md both carry the new fields, the Rail A/Rail B semantics, and the allocatedPortion subtraction-only contract; submodule ref is committed on the branch. This is the discipline the process asks for.
• Shared types match the documented contract; budgetLines[].allocatedPortion being subtraction-only (and deliberately not summing to allocatedAmount) is documented in both the type and the wiki, which is the right call for an intentionally non-obvious invariant.
• i18n parity clean — zero en-only or de-only keys in budget.json; budgetSourceHintLargest and confirmClaimExcludedItemsWarning are both now referenced from source (the Deposit budget-source auto-default (none/single/largest heuristic) is not implemented #1893 dead-key finding is resolved).
• Fully-excluding all budget lines on an invoice makes it disappear from the report wizard's step-3 list #1892 and Deposit budget-source auto-default (none/single/largest heuristic) is not implemented #1893 both genuinely fixed, not papered over.
• applyLineExclusions zero-exclusion strict no-op confirmed (if (excludedLineIds.size === 0) return report; — same reference), and the PDF is generated from the same currentEffectiveReport, so preview and download stay identical as the AC requires.

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CI note

Quality Gates is green (the required gate for beta). E2E Gates is red — shards 5/16 and 15/16. Logs were no longer retrievable at review time; please confirm these are the known diary flakes rather than fallout from the SelectionActionBar aria-live change or the CSP widening before merge.

[steilerDev]

[ux-designer] Design review against the visual spec posted on #1891.

Verdict: APPROVED (with non-blocking findings — please address before merge or in refinement)

What matches the spec exactly

• Status chip fix: .checkboxWithContent { grid-column: span 2; } + Badge className={styles.statusChip} with justify-self: start — root cause fixed exactly as specced, and applied consistently to both .invoiceRow and .listHeader (grid-template-columns: 1.5rem auto 1fr auto auto auto on both). Badge.module.css untouched — fix correctly scoped to ReportInvoiceList.module.css.
• Chevron reuse: identical <polyline points="6 9 12 15 18 9" /> SVG + .chevron/.chevronOpen classes reused for the new expand toggle — no second chevron style introduced.
• aria-expanded + aria-controls wired correctly on the toggle button, dynamic aria-label (expandInvoice/collapseInvoice) confirmed in en/budget.json:1217-1218. Non-expandable rows correctly render a blank aria-hidden placeholder to preserve column alignment.
• Tri-state parent checkbox semantics: isTriStateChecked/isTriStateIndeterminate derivation in ReportInvoiceList.tsx:151-157 matches the spec's four-state truth table exactly, including the "no items = checked" and "all items excluded = fully unchecked" edge cases. Click still only writes to excludedInvoiceIds via onToggle — item checkboxes never touch it, so "claiming stays invoice-level" holds at the interaction layer as specced.
• Item exclusion checkbox aria-label uses the exact specced dynamic pattern (excludeItemAriaLabel, confirmed in locale file).
• Deposits sub-table: refund badge reuses .refund, entry-type badge uses BadgeStyles.info/.refund exactly as specced, status badges correctly reuse the existing .pending/.paid/.claimed classes (no new CSS). Verified server-side (sourceReportService.ts) that deposits[] is filtered to untagged-or-this-source only, so the "Allocated source" badge's use of report.source.name as the label is correct — a non-null budgetSourceId in this list can only ever be report.source.id.
• Both sub-tables independently show EmptyState rather than collapsing to nothing.
• Deposit source picker: plain <select className={sharedStyles.select}>, placed immediately after the entry-type radio group and before the amount/due-date row, "None (pro-rated)" as value="", editable in edit mode (gated only on isMutating, not isEdit — correctly distinct from the immutable entryType radios). All three hint copy variants present and correctly worded per spec.
• Real-sources-only default logic: openAddModal correctly derives the default from sourceStats.sourceIds (null/unassigned lines excluded), and budgetLineSourceCount fed to the hint text uses the same real-sources-only count — so the hint variant shown (single/largest/none) always agrees with which source was actually defaulted. Good catch keeping these two in sync.
• Mark-claimed warning: .warningBlock/.warningIconContainer/.warningIcon ported into ReportWizardPage.module.css using the same tokens as MassMoveModal (--color-warning-bg, --color-warning, --color-text-secondary, all dark-mode-aware), role="alert", placed between the existing confirm body and the footer, count-aware copy. No spurious "understood" checkbox added, matching the spec's "informational, not a destructive gate" call.
• SelectionActionBar: aria-live="polite" aria-atomic="true" added to .count exactly as specced (and correctly not duplicated with role="status").
• CSP: frameSrc: ["'self'", 'blob:'] — only directive touched, matches AC EPIC-01: Authentication & User Management #1's "no other directive loosened" requirement.
• Dark mode: every new color reference (--color-warning*, --color-status-*, --color-border, --color-text-*, --color-source-*) routes through Layer 2 semantic tokens already flipped in tokens.css; no hardcoded hex found in the new CSS.

Findings (non-blocking — Medium)

1. Expand-panel focus management steals focus on unrelated collapses. ReportInvoiceList.tsx:106-117 keys the focus-on-open effect off the whole expandedInvoiceIds Set and always focuses Array.from(expandedInvoiceIds).pop(). Repro: expand invoice A, then expand invoice B (both now open), then collapse A. The Set becomes {B}, the effect re-fires, and focus jumps into B's already-open panel even though the user only interacted with A's collapse button. The spec asked to mirror InvoiceGroup's per-row local isExpanded + focus-on-that-row's-own-open contract specifically to avoid this cross-row effect. Recommend keying focus off each row's own expand transition (e.g. a per-row useEffect on that row's isExpanded boolean) rather than deriving "last" from the shared Set.

2. Expand button likely overflows its 1.5rem grid column. .expandButton { min-width: 44px; min-height: 44px; } sits inside a fixed 1.5rem (24px) grid track (grid-template-columns: 1.5rem auto 1fr ...). min-width overrides width:100%, so the button's rendered box (44px) will exceed its 24px track and visually overflow into the adjacent checkbox column — this is exactly the failure mode the spec called out and prescribed a fix for ("wrap the button so its clickable box is 44px using negative margin / larger padding... matches .checkboxWithContent's existing min-height:44px precedent" — not a bare min-width on a grid item). Please verify visually (or via an E2E screenshot) and, if it overflows as expected from the CSS, switch to the negative-margin/padding technique.

3. Sub-tables have no mobile card-list conversion. Spec §2e called for collapsing both new sub-tables to the mobileCardList/role="list" pattern already built for InvoiceDepositsSection's DepositCard below 768px, explicitly warning against inventing a second responsive strategy. The shipped CSS only wraps the tables in .tableWrapper { overflow-x: auto; } — no @media (max-width: 767px) card conversion exists, and there's no mobile-viewport E2E coverage for the expansion panel either. On a real phone this will render as a cramped, horizontally-scrolling 4-5 column table rather than the card layout used everywhere else in this exact flow (InvoiceDepositsSection).

4. .linkedItemLink:focus-visible uses outline: 2px solid var(--color-primary) instead of the standard box-shadow: var(--shadow-focus) focus-ring token (ReportInvoiceList.module.css:328-332). Every other new interactive element in this file (.expandButton, and the pre-existing .unallocatedHeader) correctly uses box-shadow: inset 0 0 0 2px var(--color-primary). Please align for consistency.

5. Unassigned budget-line badge uses the generic BadgeStyles.info instead of the purpose-built BadgeStyles.iblUnassigned. The spec pointed at InvoiceBudgetLinesSection.tsx:567-599's unassignedBadgeVariants as the pattern to reuse — that pattern uses .iblUnassigned (--color-status-not-started-bg / --color-text-muted, italic), a class built specifically for "budget line with no linked item." ReportInvoiceList.tsx:322-330 instead uses BadgeStyles.info (the generic neutral/notice badge, e.g. "Auto-created"). Both read as gray badges but are visually and semantically distinct; please swap to BadgeStyles.iblUnassigned to match the established pattern exactly.

Low / informational

• The deposits sub-table separator (margin-top/padding-top/border-top) is applied via inline style={{ ... 'var(--spacing-4)' ... }} in the .tsx rather than a CSS Module class. The values are still tokens (not hardcoded), so this isn't a hardcoding violation, but it bypasses stylelint's automated token-usage enforcement and is inconsistent with the rest of the file's CSS-Modules-only convention. Consider promoting to a .subTableSeparated class.
• The "Linked to" column renders a plain <a href="/project/work-items/{id}"> rather than a React Router <Link to=...> as specced — clicking it will trigger a full page reload instead of client-side navigation out of the expansion panel. Flagging since the spec explicitly called for <Link>, though this is more of a frontend-correctness note than a visual one.

None of the above are contrast failures, broken dark mode, or blocking a11y defects (keyboard traps, unreachable controls) — all are addressable in refinement per the decision matrix. Nice work getting the tri-state semantics and the source-tagged deposit contract exactly right; those were the highest-risk parts of this spec.

[steilerDev]

[product-owner]

PR Review — Story #1891 (32 acceptance criteria)

Verdict: CHANGES_REQUIRED — 31/32 ACs met. One functional blocker in §4 (AC 4.6): the tagged-deposit aggregation double-counts, inflating bank-facing claim amounts on the default picker path.

Everything else in this PR is in good shape, and §1–§3 are genuinely well done. The blocker is a single, localized formula error with a one-filter fix.

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AC coverage

Section	Met	Notes
§1 CSP bug (5 AC)	5/5	AC 1.4 satisfied by documented deviation — see below
§2 Chip sizing (4 AC)	4/4
§3 Expandable rows (11 AC)	11/11
§4 Deposit budget source (12 AC)	11/12	AC 4.6 not met

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BLOCKER — AC 4.6: a source-tagged deposit is counted twice, not "100% toward its tagged source"

"Given a deposit tagged with a budget source, when rollups are computed, then its status-sliced contribution counts 100% toward its tagged source"

The intent of this AC (and of the locked-in decision it came from) is that tagging redirects a deposit's contribution from pro-rata to 100%-to-the-tagged-source. The implementation adds Rail B on top of an unreduced Rail A.

In splitByDepositsExcludingTagged (server/src/services/shared/depositAggregateUtils.ts), a tagged deposit is dropped from the deposit list before the residual is computed:

const totalDepositTypeAmount = deposits            // untagged only
  .filter((d) => d.entryType !== 'refund')
  .reduce((s, d) => s + d.depositAmount, 0);
const residualFraction = Math.max(0, safeInvoiceAmount - totalDepositTypeAmount) / safeInvoiceAmount;

Because the tagged deposit never reaches totalDepositTypeAmount, its share stays inside Rail A's residual (re-attributed to the invoice's status) and is added again by Rail B.

Repro — this is the default path, not an edge case

Invoice €1000, status pending; one budget line €1000 → Source A; one deposit €400 paid tagged to Source A. Claim report slice = {pending, paid}.

• Rail A: residual fraction 1.0 → €1000 under pending ✓ in slice
• Rail B: €400 under paid ✓ in slice
• allocatedAmount = €1400 on a €1000 invoice

AC 4.2 makes the picker default to the invoice's only source — so the ordinary act of adding a deposit and accepting the default inflates that invoice's claim by the deposit amount. On a document sent to a financing bank, that is an overstated claim.

The two-source case is affected too: sourceReportService.test.ts:831 asserts A=750, B=400 on a €1000 invoice (€1150 total).

This is currently encoded as expected behaviour in the test suite, which is why CI is green:

• server/src/services/sourceReportService.test.ts:925 — titled "a tagged deposit does NOT get double-counted" but asserts toBeCloseTo(1400). Its comment contains a mid-sentence — wait pending IS in the claim slice) —, i.e. the reasoning was not resolved before the number was accepted.
• depositAggregateUtils.test.ts:1372 — asserts residualFraction === 1 for a tagged deposit, locking in the defect at the unit level.

Per the source-of-truth hierarchy (spec > production code > test code), the AC wins: these tests must be corrected, not the AC re-interpreted. The wiki page written to match the implementation (API-Contract.md, "Rail A … excluded from the pro-rata pool entirely") needs the same correction.

Fix

Keep tagged deposits out of depositFractions (correct today), but include their amounts when reducing the residual — so the money leaves Rail A and is re-added, whole, by Rail B. Refund-type entries need no change (they already never reduce the residual, per #1876).

Expected numbers after the fix:

• Same-source repro: Rail A = 1000 × 0.6 = 600, Rail B = 400, combined = 1000 ✓
• Two-source case (:831): residual 0.85 → A = 600×0.85 + 150 = 660, B = 400×0.85 = 340, total 1000 ✓
• Deposit tagged to a source with zero lines on that invoice: unchanged — Rail A contributes 0 to that source, Rail B contributes 100%. AC 4.6's "including when the invoice has no budget lines for that source" still holds, and the user's accepted cross-source contradiction is preserved.

This applies identically to budgetSourceService.computeClaimedAmount / computeUnclaimedAmount (they share the same helper), so AC 4.8's consistency requirement stays satisfied once fixed.

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MUST FIX before merge (non-blocking, no re-review loop needed)

1. Stale "KNOWN BUG" docstrings. Fully-excluding all budget lines on an invoice makes it disappear from the report wizard's step-3 list #1892 was fixed on this branch, but the E2E docs still present it as open and say the scenario fails:

   • e2e/tests/budget/reportWizardExpansion.spec.ts:28 — "This scenario currently fails"; the KNOWN BUG (Scenario 4) block at :43; the inline note at :516
   • e2e/pages/ReportWizardPage.ts:75 — "KNOWN BUG (filed, see story E2E memory)"

   These will actively mislead the next reader into thinking a shipped defect is outstanding.

2. Correct the two tests above alongside the blocker fix (name + asserted values + the unresolved wait comment).

3. Coverage gap. budgetSourceService.test.ts:3149 ("Rail A + Rail B combine additively for the same source") deliberately puts the Rail B deposit on a different invoice, so the same-invoice line + tagged-deposit case — exactly where the inflation occurs — is never exercised at the rollup level. Please add it.

4. Minor UX nit (optional): the expansion focus effect in ReportInvoiceList.tsx re-focuses "the last expanded panel" on every change to expandedInvoiceIds, including collapses — so collapsing one row can move focus into an unrelated open row.

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Verified good

§1 CSP (5/5). frameSrc: ["'self'", 'blob:'] is the minimal correct change, and helmetPlugin.test.ts pins the exact emitted frame-src 'self' blob: clause and asserts every other directive is byte-unchanged (AC 1.3) — including that upgrade-insecure-requests is still absent.

On AC 1.4/1.5: I accept the reworked verification. The AC asked the assertion to prove the frame renders; the final check instead asserts the emitted CSP frame-src directive plus zero CSP console violations. Two attempts at a literal render check were tried and abandoned for sound reasons, both documented with CI run IDs (headless Chromium ships no PDF viewer, so an iframe→PDF blob never completes navigation regardless of CSP; and an in-page fetch(blob:) is itself governed by connect-src 'self'). Refusing to loosen production connect-src to make a test pass was the right call — I would have rejected that trade. AC 1.5's "must fail against the pre-fix CSP" is satisfied by construction: expect(frameSrcValues).toContain('blob:') fails deterministically against ["'self'"]. What we give up is proof of actual rendering in CI; that remains covered by the user's live verification and realRender.test.ts. The investigation trail is recorded in agent memory so this isn't re-litigated — good.

§2 Chip (4/4). Fixed with a scoped justify-self: start on the wizard's own .statusChip class; the shared Badge component is untouched, so AC 2.3 holds by construction. E2E Scenario 2 proves short vs. long labels render at genuinely different widths. (The mechanism is viewport-independent, so AC 2.4 holds, though only desktop is asserted explicitly.)

§3 Expansion (11/11). Real <button> with aria-expanded/aria-controls and preventDefault() so the manual key handler doesn't double-toggle. Items are correctly scoped to the reported source; unlinked lines get an explicit Unassigned badge (AC 3.3). Exclusions thread through row amount, running total, and the regenerated PDF from a single applyLineExclusions source of truth, so preview and download cannot diverge (AC 3.4). Claiming stays invoice-level and the role="alert" warning names the affected count (AC 3.6/3.7) — the locked-in decision is respected. The refund sign is read straight off allocatedAmount with no re-negation (AC 3.10) — the trap that caught PR #1887 four times. All new keys resolve in both en and de (AC 3.11) — I verified this programmatically rather than by inspection.

§4 (11/12). Migration 0044 is nullable with no backfill and an index (AC 4.1); the picker's none/single/largest heuristic and its three distinct hints are correctly implemented (AC 4.2–4.4, closing #1893); clearing stores null (AC 4.5); untagged pro-rata is proven byte-identical to the pre-story path (AC 4.7); budgetLines[]/deposits[] carry everything the UI needs, with cross-source deposits filtered server-side so the "Allocated Source" badge cannot mislabel (AC 4.9/4.10); shared types and the wiki moved together (AC 4.11).

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CI

E2E Gates is red, but not from this PR:

• Shard 5 — the two known pre-existing failures (invoices.spec.ts "Effective Amount" Deposit refunds with negative claim adjustments #1876-era flake, dashboard.spec.ts "card is dismissed"). Both predate this branch. They still must be triaged before this mini-epic is promoted to main, where E2E Gates is required.
• Shard 15 — pure infrastructure: ghcr.io HTTP 500/timeout during container pull. Re-run.

Quality Gates is green; the new reportWizardExpansion.spec.ts passed.

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Re-request review once the Rail A residual fix and the corrected tests are in — I'll re-verify AC 4.6 against the three numbers above and re-check nothing in §4's untagged path moved.

[steilerDev]

[product-architect]

Architecture Re-Review — PR #1894 (Story #1891 / bugs #1892, #1893)

VERDICT: APPROVED — the critical Rail A/Rail B double-count is fixed exactly as prescribed, verified on 74289586. Remaining findings are Medium/Low and routed to refinement or follow-up issues.

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CRITICAL — Rail A/Rail B double-count: RESOLVED

Verified splitByDepositsExcludingTagged() at server/src/services/shared/depositAggregateUtils.ts:530-571. The fix is precisely the prescribed one:

• totalDepositTypeAmount now accumulates over all deposits (deposits.filter((d) => d.entryType !== 'refund')), tagged or not — so residualFraction is character-for-character the same expression as legacy splitByDeposits (:106-110). Tagging no longer touches the denominator.
• The isTagged filter now applies only to the emitted depositFractions (:554), which is the pro-rata line apportionment Rail B replaces.
• Refund-type entries are still kept out of the residual denominator and still emit a negative fraction — unchanged, correct.

Legacy containment re-confirmed. git diff origin/beta...HEAD -- depositAggregateUtils.ts is still a single append hunk at EOF (@@ -467,3 +467,269 @@), zero deletions. All six legacy exports remain byte-identical to beta.

Test arithmetic — I re-derived every reconciled assertion independently:

Fixture	Expected	Derivation	✓
depositAggregateUtils — 1000€ inv, 300€ tagged	residualFraction 0.7, depositFractions empty	(1000−300)/1000 = 0.7	✓
depositAggregateUtils — 300€ untagged + 200€ tagged, same invoice	residual 0.5, one fraction @ 0.3	(1000−300−200)/1000 = 0.5; untagged 300/1000 = 0.3	✓
budgetSourceService — canonical same-invoice	claimed 400, unclaimed 600, paid 1000	Rail B 400 @claimed; Rail A 1000 × 0.6 = 600 @paid	✓ (was 1400)
sourceReportService — two-source reconciliation	A 660, B 340, Σ = 1000	residual (1000−150)/1000 = 0.85; A 600×0.85 + 150; B 400×0.85	✓ (was 750/400 = 1150)
sourceReportService — canonical	1000	1000 × 0.6 + 400	✓ (was 1400)

The cross-source sum-to-1000 sanity assertion is the right invariant to have pinned, and the same-invoice combined-rail test I asked for is present at budgetSourceService.test.ts (Rail A 600 + Rail B 400), complete with the untagged control proving the legacy path is untouched. Coverage now exists at all three levels.

Executed locally on 74289586: depositAggregateUtils.test.ts + sourceReportService.test.ts → 157/157 pass; budgetSourceService.test.ts → 173/173 pass.

D-2 (isSplit too narrow) — RESOLVED

The UNION at sourceReportService.ts:255-276 is the right shape: both arms IS NOT NULL-filtered, UNION (not UNION ALL) so a source reachable via both a line and a tagged deposit collapses to one, then COUNT(DISTINCT source_id). The five regression tests cover the full truth table — cross-source line+deposit, deposit-only two-source, untagged deposit, same-source line+deposit, single tagged deposit — and each expectation follows from the query. Shared type docstring and wiki both updated to match. Adding the explicit IS NOT NULL predicates is behaviour-preserving for the budget-line arm (COUNT(DISTINCT …) already skipped NULLs) and makes the intent legible.

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Medium findings — remain open, all non-blocking

Re-checked on HEAD; none were addressed in 86a9770a, and none is escalated by the fix. Per my verdict matrix these do not block merge, but they should be picked up in refinement:

• M1 — N+1 in getSourceReport. Step j (:389-395) still issues one SELECT … FROM invoice_deposits WHERE invoice_id = ? per invoice, and step d two more per Rail-B-only invoice. Unchanged from my first pass; still tolerable at <5 users / this data volume, still the wrong pattern for the next report feature to copy. One inArray(invoiceDeposits.invoiceId, allInvoiceIds) closes it.
• M2 — household absent from the regeneration effect deps (ReportWizardPage.tsx:291-299, behind the exhaustive-deps disable). regeneratePdf still closes over household. Latent, ordering-dependent; same for t/formatters on mid-wizard locale switch.
• M3 — an invoice can vanish from the report entirely. sourceReportService.ts:477's NOT EXISTS (… d.budget_source_id = :sourceId) is still unqualified by status. An invoice with no budget lines whose only tagged deposit sits outside the report's slice is excluded from unallocatedInvoices and contributes 0 to combinedContributions, so it appears nowhere. Narrowing the guard to deposits within targetStatuses fixes it. This is a visibility gap in an informational list, not a money error — it does not distort any bank-facing figure.

Low

• L1/L2/L3 from my first review stand as written (the new Set([status === 'claimed' ? … ]) form, the now-always-true allocatedInvoices predicate, applyLineExclusions in a render IIFE rather than useMemo).
• L4 (new) — depositAggregateUtils.test.ts:1417 is titled "a tagged deposit is still deduplicated by depositId (dedup happens before the tag filter)" and its comment says the second row appears "this time WITHOUT the tag" — but neither row sets budgetSourceId, so both are untagged and the test never exercises the tagged/untagged-same-id path it claims to. It is a valid plain-dedup test; only the name and comment overclaim. Setting budgetSourceId: 'src-A' on the first row would make it match its title. Cosmetic — dedup itself is correct and covered.

Follow-ups correctly routed

D-1 → #1895 (mark-as-claimed is invoice-scoped, HIGH), D-3 → #1896, M-1 → #1897. Filing rather than in-lining these was the right call — #1895 in particular is a distinct correctness bug in markInvoicesClaimed with its own blast radius, and bundling it here would have widened this PR well past its story.

I'll also repeat the standing follow-up from my first review: collapse the *ExcludingTagged pair back into the legacy functions behind an options.excludeTagged flag once this has soaked. This round is the concrete argument for it — the residual formula had to be re-verified in two near-duplicate places, and only one of them had the bug.

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Wiki — updated in this review

The PO was right that API-Contract.md still described the pre-fix semantics. Fixed and pushed to the wiki (e189ce9..616bc90):

• Rail A bullet rewritten — a tagged deposit loses only its pro-rata line apportionment and remains in the residual denominator, with the invoice-level nature of the residual called out explicitly (a deposit tagged to A also reduces the Rail A share of a source-B line on the same invoice — the thing that makes the rails reconcile).
• Reconciliation invariant added to the Combined bullet, with the 660/340/1000 worked example.
• invoices[].isSplit rewritten to the union-of-both-arms definition; the allocatedAmount row's parenthetical corrected too.
• Deviation Log entry appended per process.

Two notes on that push:

1. The wiki working tree had an unrelated uncommitted edit to ADR-034-Client-Side-Report-PDF-Generation.md (someone's in-flight work). I staged only API-Contract.md and left that change untouched in the working tree — it is still uncommitted and needs its owner.
2. Because I pushed the wiki outside this branch, PR feat(reports): allow blob preview under CSP, expandable invoice items and deposit source allocation #1894's committed submodule ref still points at e189ce9 and is now one commit stale. Please bump wiki to 616bc90 and amend it into the branch before merge, so the PR carries the doc fix it describes.

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CI

At review time Quality Gates was still in_progress on 74289586 (run 30544760552); PR state MERGEABLE / BLOCKED pending checks. My approval is contingent on it going green — and on the prior E2E Gates shard 5/16 and 15/16 failures being confirmed as the known diary flakes rather than fallout from the SelectionActionBar aria-live change or the CSP widening. That confirmation is still outstanding from my first review.

[steilerDev]

[product-owner]

Re-review — Story #1891 (32 acceptance criteria) @ 74289586

Verdict: APPROVED — 32/32 ACs met. The AC 4.6 blocker is fixed at the root, the two tests that encoded the defect are corrected rather than deleted, and I found no regression in the 31 ACs that previously passed.

Two documentation MUST FIX items remain (wiki lines, non-blocking on this review loop) and two nits.

Section	Previous	Now
§1 CSP bug (5 AC)	5/5	5/5 (untouched by the fix round)
§2 Chip sizing (4 AC)	4/4	4/4
§3 Expandable rows (11 AC)	11/11	11/11 (re-verified against the new dual rendering)
§4 Deposit budget source (12 AC)	11/12	12/12

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AC 4.6 — verified fixed

splitByDepositsExcludingTagged now keeps all deposits in the residual denominator and filters tagging only at the depositFractions emission step:

// residual: ALL deposits (tagged or not), refund-type excluded — identical to legacy splitByDeposits
const totalDepositTypeAmount = deposits.filter((d) => d.entryType !== 'refund')…
// Rail A emission: untagged only
const depositFractions = deposits.filter((d) => !d.isTagged).map(…)

That is exactly the add→redirect semantics the AC asks for: the tagged deposit's money leaves Rail A and is re-added whole by Rail B, instead of being added twice. I re-derived all three numbers from my previous review against the committed code:

• Canonical repro (€1000 pending invoice, €1000 line → A, €400 paid deposit tagged to A): residual 0.6 → Rail A 600 + Rail B 400 = €1000 on a €1000 invoice. sourceReportService.test.ts asserts toBeCloseTo(1000).
• Two-source case: residual 0.85 → A = 510 + 150 = 660, B = 340. The test now also carries an explicit conservation assertion (660 + 340 === 1000, not 1150) — good, that is the invariant that was missing.
• Deposit tagged to a source with zero lines on the invoice: Rail A 0, Rail B 100% — AC 4.6's "including when the invoice has no budget lines for that source at all" still holds, and the user's explicitly-accepted cross-source contradiction is preserved. Covered by two new getSourceReport regression tests.

I also checked the refund path, which the fix could have disturbed: refund-type entries are still filtered out of totalDepositTypeAmount, and a tagged refund is excluded from depositFractions and re-added signed by sumTaggedDepositContributions — so the #1876 rule (refunds stored positive, negated at aggregation, never reducing the residual) is intact for both tagged and untagged refunds. Untagged inputs are now strictly identical to splitByDeposits, so AC 4.7 is stronger than before, not weaker.

All four previous MUST FIX items are done:

1. Stale KNOWN-BUG docstrings — reportWizardExpansion.spec.ts (:28, the :43 block, :516) and ReportWizardPage.ts:75 now read as regression guards for the fixed Fully-excluding all budget lines on an invoice makes it disappear from the report wizard's step-3 list #1892, with the corrected filter expression quoted. Comments only; no assertion changed.
2. The two defect-encoding tests — renamed, re-derived, and the unresolved — wait pending IS in the claim slice) — fragment is gone. depositAggregateUtils.test.ts residuals are now 0.7 / 0.5 with the reasoning spelled out. Corrected in the direction the source-of-truth hierarchy demands (spec wins over test).
3. Coverage gap closed — budgetSourceService.test.ts gains the canonical same-invoice case (Rail A 600 unclaimed + Rail B 400 claimed = paid 1000, "NOT 1400") plus an untagged legacy control on identical fixture shape. That is the case the old "combine additively" test dodged by using two different invoices.
4. Focus nit — properly fixed, not papered over: lastExpandedIdRef is only written on an open transition, and the effect no-ops unless that id is still expanded. Collapsing a row can no longer yank focus into an unrelated open panel.

All 6 Jest shards, Static Analysis, Coverage Report and Trailer Check are green on 74289586, so these are verified-passing numbers, not just verified-by-reading.

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No-regression check on §3 (the dual desktop/mobile rendering)

This was my main concern, since the mobile card list is a second DOM copy of the sub-tables. Re-verified:

• AC 3.4 holds by construction. Both the desktop <td> checkbox and the mobile card checkbox call the identical onToggleLine(line.id, !e.target.checked) — there is no second exclusion path that could diverge from applyLineExclusions. The mockGenerateReportPdf assertions in ReportWizardPage.test.tsx are untouched, so the exclusion → row amount → running total → regenerated PDF chain is still proven end-to-end.
• No duplicated accessible names. .mobileCardList is display: none by default and .tableWrapper is display: none under max-width: 767px — display: none removes the subtree from the accessibility tree, so exactly one instance of each control is exposed at any viewport. The duplication is a jsdom-only artifact, correctly handled by the getAllByRole(...)[0] disambiguation in 74289586 (with an explanatory comment, so the next reader doesn't "simplify" it back).
• AC 2.x is not touched by the mobile work. .tableWrapper is used only inside the expansion panel (lines 293 and 434) — the step-3 invoice list itself is a CSS grid, not a table, so it does not vanish on mobile. .statusChip { justify-self: start } has no media-query override in the file, so the chip fix holds identically at all three viewports (AC 2.4).
• AC 3.8 fields all present on mobile — amount, status, dates, entry type, allocated source.
• AC 3.10 not re-broken. The mobile card negates deposit.amount for refunds, which matches the desktop cell exactly and is the correct Deposit refunds with negative claim adjustments #1876 display rule for the deposits sub-table. The invoice row's allocatedAmount is still read straight through with no negation. Both rules coexisting correctly in one component is the thing that caught PR feat(reports): add bank report wizard with client-side PDF pipeline #1887 four times — good to see it right here.
• AC 3.11 re-verified programmatically on the committed tree, including the newly-referenced keys: all 37 literal sourceReports.* keys plus sources.lines.invoiceStatus.* resolve in en/budget.json, and all 116 sourceReports.* keys have German counterparts (zero missing).
• <a href> → <Link to> is a correctness improvement (full page reload → SPA navigation) and BadgeStyles.info → BadgeStyles.iblUnassigned reuses the existing semantic class rather than inventing one. Both fine.

The isSplit widening is in scope and I endorse it. An invoice funded from source A via a tagged deposit and source B via lines genuinely is split across sources — under the old line-only query the bank-facing PDF would silently omit the split footnote for exactly the configuration this story introduced. It stays server-derived (a UNION sub-query), so AC 4.12 holds, and the 5 new regression tests pin all four combinations (lines+deposit different sources, deposits-only two sources, untagged, same-source, single tagged) including the negative cases. This narrows my recorded contract fact — the field now means "funding spans 2+ distinct sources across budget lines and tagged deposits"; I have updated agent memory accordingly.

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MUST FIX before merge (documentation — no re-review needed)

The wiki is still on the pre-fix description. origin/master is at e189ce9 and both of these lines are unchanged there. AC 4.11 requires the shared types and the API Contract page to move together; the shared type's JSDoc was updated in this PR, the wiki half is outstanding:

1. API-Contract.md:4186 (Rail A) — "deposits with non-null budget_source_id are excluded from the pro-rata pool entirely. The residual (unaccounted invoice portion) uses the remaining deposits" now describes the defect, not the code. Tagged deposits are excluded from the emitted deposit fractions but are subtracted from the residual denominator. I understand the product-architect is already handling this one.
2. API-Contract.md:3609 (isSplit) — still reads "True iff this invoice's budget lines reference more than one distinct budget source". This is a second, separate correction that may not be on the architect's list — please make sure it lands with the Rail A edit. (Line 3607's allocatedAmount wording is still accurate as written.)

Nits (non-blocking, your call)

1. Mobile omits the — placeholder for an untagged deposit's Allocated Source, where the desktop table renders it. Defensible card-layout convention (cards drop empty fields), and no AC mandates the placeholder — flagging only so the asymmetry is deliberate rather than accidental.
2. getByText → getAllByText(...).length > 0 is the right shape for the dual DOM but drops the "exactly one" guarantee. If you want the strictness back later, scoping with within(desktopTable) would keep both properties. Not worth churning now.

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CI

Quality Gates is still in_progress on 74289586 (Docker job pending, E2E not yet reported) — my approval is on the acceptance criteria and is not a waiver of the gate. The evidence that matters for the blocker is already in: all 6 unit shards green, which is where the corrected 1000 / 660 / 340 / 0.7 / 0.5 assertions live.

Unchanged from my last review and still owed before this mini-epic is promoted: the E2E shard 5 pre-existing failures (invoices.spec.ts "Effective Amount" #1876-era flake, dashboard.spec.ts "card is dismissed") must be triaged, since E2E Gates is required on main. Not attributable to this PR.

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Thanks for taking the residual fix at the root rather than special-casing the report path — doing it in the shared helper is what keeps AC 4.8's consistency requirement true for budgetSourceService and GET /api/source-reports simultaneously. Nice work on #1895/#1896/#1897 being filed rather than folded in; keeping claim close-out out of this PR was the right scope call.

[github-actions]

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