docs: update HISTORY v0.26.0, remove completed XLSX dual-column from FUTURE

FUTURE.md

@@ -31,53 +31,6 @@ Items are grouped under their priority section heading (`## 🔴 CRITICAL`, `##
 
 ## Pending Recommendations
 
-### 🔴 Import XLSX Dual-Column Layout Not Parsed — CRITICAL
-**Priority:** CRITICAL  
-**Added:** 2026-05-11 by Ripley
-
-**Description:**
-The real-world spreadsheet (`backups/monthly bills.xlsx`) uses a **dual-column layout** — each monthly sheet is split into two halves representing two payment periods:
-- **Left half (columns A-E):** Bills due around the **1st** of the month
-- **Right half (columns G-K):** Bills due around the **15th** of the month
-
-Each half has its own `Due Date | Bill | Amount | Paid Date | Date Cleared` headers. The current parser only detects headers in the first row and processes columns linearly, so it captures the 1st-of-month bills but completely misses all 15th-of-month bills (roughly half the data).
-
-Example from Apr 2026 sheet:
-```
-Left (1st):  auto | Roadrunner ATV | $225.64 | paid 2026-03-01  (due ~1st)
-Right (15th):      | Amazon chase card | $366    | paid 2026-04-20  (due ~15th)
-```
-
-**Rationale:**
-- This is the actual production spreadsheet the app needs to import
-- ~100 monthly sheets spanning 2017–2026, each with two payment periods
-- The 15th-of-month bills (credit cards, loans, subscriptions) are completely lost during import
-- Without dual-column support, the import feature is broken for real data
-- The "1st vs 15th" split is semantically meaningful — it maps to `due_day` in the bill model
-
-**Additional Issues in This Spreadsheet:**
-- Rows 1–2 contain paycheck/leftover summary data, not bills — parser must skip these
-- Non-numeric amount values: "double pay", blank amounts, "past due" — need graceful handling
-- Due date column contains non-date values: "auto" (autopay indicator), "24th" (day-of-month shorthand), account numbers like "9522104"
-- Some sheets have slight column layout variations (extra column, merged cells)
-- Sheet names have typos: "Januaru 2021", "Novevmber 2019", "Febuary 2023" — parser already handles these
-- 3 non-month sheets ("2018 taxes", "debt totoals", "home ownership expenses") should be skipped — already handled by `NON_MONTH_SHEET_RE`
-- "auto" in the Due Date column is an autopay flag, not a date — should be detected as a label, not parsed as a date
-
-**Implementation Notes:**
-- Modify `spreadsheetImportService.js` to detect dual-column headers in a single sheet row
-- When two sets of bill headers are found (A-E and G-K), process each half independently
-- Left half rows should default `due_day` to ~1, right half rows should default `due_day` to ~15
-- Each half produces its own set of rows with the same sheet name/month context
-- Handle non-numeric amount cells gracefully (null amount, "double pay" as a note/label)
-- "auto" in Due Date column → set `autopay` label/detected label, don't try to parse as date
-- "24th" in Due Date column → parse as day-of-month (24)
-- Skip rows where the bill name cell is blank AND the amount cell is blank or non-numeric
-- Filter out paycheck/summary rows (Row 1: Paycheck amounts, Row 2: Left Over calculations)
-- The `backups/monthly bills.xlsx` file is in `backups/` (gitignored) for testing
-- Files to modify: `services/spreadsheetImportService.js`, possibly `routes/import.js`
-- Estimated effort: 4-6 hours
-
 ### 🔴 No Confirmation Before Destructive Actions — CRITICAL
 **Priority:** CRITICAL  
 **Added:** 2026-05-11 by Ripley

HISTORY.md

@@ -1,5 +1,19 @@
 # Bill Tracker — Changelog
 
+## v0.26.0
+
+### Added
+- **Dual-column XLSX import** — Spreadsheets with two side-by-side bill tables (bills due ~1st and ~15th) are now both imported. Left half defaults `due_day` to 1, right half defaults to 15.
+- **Header row scanning** — Parser scans rows 0–4 for bill headers instead of assuming row 0, correctly skipping paycheck/summary rows.
+- **Day pattern parsing** — Due date values like "1st", "15th", "24th" are now parsed as day-of-month numbers.
+- **Non-numeric amount labels** — "auto", "double pay", "past due" in amount cells become detected labels instead of causing parse errors.
+
+### Changed
+- **Cell type validation** — Allow `'s'` (shared formula) cell type in XLSX parsing, fixing import failures on some spreadsheet formats.
+
+### Security
+- **Audit by Private_Hudson** — Bounds validation in `isBlankRowForHeaderSet`, anchored regex for day patterns, label sanitization verified. All checks PASS.
+
 ## v0.25.0
 
 ### Added