chore: bump to v0.34.1, add changelog entry for price-change drift detection

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

HISTORY.md

@@ -1,5 +1,22 @@
 # Bill Tracker — Changelog
 
+## v0.34.1
+
+### 🚀 Features
+
+- **Price Change Insights panel** — Tracker page now shows a collapsible amber panel when recurring bills have been paid at a different amount than expected for 2+ consecutive months. Per-bill "Update to $X.XX" action (with undo toast) and "Dismiss" (hidden for 30 days). TrendingUp/TrendingDown icons and teal palette for decreases.
+- **Drift detection service** — `driftService.getDriftReport()` computes a rolling median of the last 3 months of payments per bill and compares it against `expected_amount`. Flags when `|delta| ≥ $1 AND |drift%| ≥ threshold`.
+- **Price-change email digest** — Daily worker now calls `runDriftNotifications()`, sending a single amber-styled digest email per user listing all bills with changed amounts (old → new, Δ%).
+- **Drift snooze persistence** — `drift_snoozed_until` column on `bills` (migration v0.71). `POST /api/bills/:id/snooze-drift` sets a 30-day snooze server-side.
+- **"Notify on price changes" toggle** — New notification preference in ProfilePage, backed by `notify_amount_change` column on `users` (migration v0.71).
+- **Price change sensitivity setting** — "Price change sensitivity" `%` input in SettingsPage Billing Behavior section. Stored as `drift_threshold_pct` in per-user settings (default 5%, range 1–25%).
+
+### 🔧 Changed
+
+- **Bump** — `0.34.0` → `0.34.1`
+
+---
+
 ## v0.34.0
 
 ### 🚀 Features

package.json

@@ -1,6 +1,6 @@
 {
   "name": "bill-tracker",
-  "version": "0.34.0",
+  "version": "0.34.1",
   "description": "Monthly bill tracking system",
   "main": "server.js",
   "scripts": {