The previous fix only handled the unambiguous case (day > 12). Dates like
"5/1/26" or "12/1/26" (Jan 5 / Jan 12, 2026) were falling through to
JS's new Date() which parsed them as US format MM/DD/YY, assigning them
to May and December instead of January.
Now any 3-part slash date with a 2-digit year in position 3 and a valid
month in position 2 is treated as DD/M/YY (Spanish/EU convention),
fixing weeks 2-3 of January (days 5-18) showing zero sell-out.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add support for European day-first date format (e.g. "23/2/26" = 23 Feb 2026)
in the sell-out CSV pipeline so months and years are correctly extracted from
column C of Amazon Sell Out 2023-2025.csv.
- normalizeMonth: detect DD/MM/YY when first part > 12, return "Mon-YY"
- mapRowToRecord: add 'C', 'Date', 'Fecha', 'DATA' to month column aliases
- validateSellOutHeaders: accept date columns as substitute for YEAR + MONTH
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Add date? field to BSRRecord (ISO string YYYY-MM-DD)
- processBSRExcel now extracts and stores the Date column as an ISO date
(handles both Excel serial numbers and string dates)
- VendorDataView groups chart data by date (daily) when dates are available,
falling back to weekly buckets — eliminates straight-line charts caused
by only 2 weekly data points
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Fix critical regex bug: /\\d+/ was matching literal '\d' instead of
digits, causing all rows to be rejected (week always = 0)
- Add VendorCSV format support: 'Top Level Category (Rank)', 'Date', etc.
- Derive ISO week number from Date column when no Week column exists
- Process all sheets (not just first) to handle multi-tab workbooks
- Log column names on load to aid future debugging
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
The generic regex /sale/i in ads column detection was matching "Advertising Cost
of Sales" (the ACOS % column) before reaching "7 day total sales" (the actual
attributed sales amount). This caused attributedSales30d to receive the ACOS
percentage instead of the real sales value, making experiment ACOS = 0 or 100%.
- Replace /sale/i with specific regexes: /\d+\s*day.*sale/i, /total\s+sale/i, etc.
- Replace /cost/i with regexes that exclude "cost of sales" columns
- Replace /unit/i with specific regexes for unit columns
- Add diagnostic logging for ads Excel column headers and first-row values
- Revert ACOS 100% fallback (root cause now fixed)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Change ?? to || for salesAds/units/revenue in weekly aggregation to guard against NaN
- Add || 0 fallback to ads-only records in mergeSalesAndAdsData
- Fix parseCurrency to check isNaN on all EU-format return paths
- Handle ACOS edge case: cost > 0 with adRevenue = 0 now returns 100% instead of 0%
- Add diagnostic console logging to computeDiD for data flow tracing
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Allow pasting multiple ASINs separated by spaces in any MultiSelectDropdown
search field and pressing Enter to auto-select all matching options.
Also switch ads CSV/Excel parsing to header-based column mapping for
robustness across different file formats.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
processTrafficExcel was only reading the first sheet, missing data from
year-based sheets (e.g., "2025", "2026"). Now iterates all sheets with
auto-detection of column layout, matching the processAdsExcel pattern.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Create new API endpoint api/fetch-uk-inventory.ts
- Add processUKInventoryExcel function in dataProcessor.ts
- Update handleVendorStockFetch to load PANEU + UK in parallel
- Configure Vite proxy for UK inventory endpoint
- UK stock correctly populates 'uk' field in vendorStockMap
