chore: bump version to 0.8.5, add changelog entry explaining revert

Reverts the persistent source cache added in 0.8.2 back to v0.8.1's
full-reparse path for Claude sessions; keeps the plan pill, pricing fix,
cursor-agent provider, and the Mac menubar prefetch+timezone work added
between 0.8.2 and 0.8.4.

CHANGELOG.md

@@ -2,6 +2,17 @@
 
 ## Unreleased
 
+## 0.8.5 - 2026-04-21
+
+### Fixed
+- **Stale Today totals after 0.8.2.** The persistent source cache introduced in 0.8.2 caused Today's cost to under-report and sometimes drop between polls during active Claude Code sessions. The cache keyed entries on `(mtime, size)` fingerprints that diverged from Claude's append-mostly JSONL model, producing empty or partial entries that were served on subsequent polls. Reverted the cache rewrite to the v0.8.1 full-reparse path for Claude sessions. Both the menubar and `codeburn status` now return consistent, monotonically-increasing Today totals.
+- **Menubar and terminal status disagreed on Today.** A turn that straddled midnight (user message in one day, response in the next) was bucketed by user timestamp in one code path and by assistant timestamp in another, producing different Today values in the two surfaces. Both paths now count a turn on the day its first assistant call ran.
+- **Kept from 0.8.2-0.8.4:** subscription plan tracking, pricing accuracy and CSV injection hardening, cursor-agent provider, menubar prefetch and timezone alignment. Only the cache rewrite and its follow-up patches were reverted.
+
+### Notes
+- 0.8.2, 0.8.3, and 0.8.4 on npm contain the buggy cache. Upgrade with `npm i -g codeburn@latest` or `npm i -g codeburn@0.8.5`.
+- This release uses a full reparse on every invocation, matching v0.8.1 behavior. On large corpora (5,000+ session files) expect 3 to 10 seconds per invocation. An incremental refresh design that preserves correctness is planned for a follow-up release.
+
 ## 0.8.0 - 2026-04-19
 
 ### Added

package.json

@@ -1,6 +1,6 @@
 {
   "name": "codeburn",
-  "version": "0.8.1",
+  "version": "0.8.5",
   "description": "See where your AI coding tokens go - by task, tool, model, and project",
   "type": "module",
   "main": "./dist/cli.js",