chore(release): prep v1.5.9 (#37)

Bumps `package.json` to 1.5.9 (`version-sync.mjs` propagates to
Cargo.toml + lockfiles) and stamps the 1.5.9 CHANGELOG entry.

Patches landing as 1.5.9:

- **#36** — Five-in-one refresh hot-path perf bundle: reqwest
  client reuse, conditional OAuth rotation gated on
  `last_plan_check_ms`, bulk-refresh 6 h skip-window,
  `load_profiles_index` 250 ms in-process cache, and
  snapshot-only post-refresh on the front-end. Plus the review
  follow-up commit that surfaces relogin signatures from the HTTP
  fast path, replaces the OnceLock<Result<Client, _>> with a
  rebuild-on-error shape, and hoists the 6 h threshold to a single
  shared constant.

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

Author: Cmochance

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## Unreleased
+## 1.5.9 - 2026-05-10
 
 - Bulk plan refresh (run on app launch + each local-day rollover) now skips any profile whose `last_plan_check_ms` was confirmed within the last 6 hours. On a workspace with several OAuth accounts the previous launch trickled cards updating one-by-one for 10–25 s of background work; with the gate, repeat launches inside the same working day cost zero round-trips.
 - Per-card Refresh button stops forcing an OAuth token rotation on every click. Rotation now only fires when the cached `last_plan_check_ms` is older than 6 hours (or absent); within that window the click reuses the cached `id_token` claims and only refreshes the access_token if it's actually about to expire. Saves the OAuth POST round-trip (~0.5–2 s on a slow network) on a repeat-click without losing the "user-initiated → fresh plan info" guarantee — once a day per profile the heavier path still runs.

package-lock.json

@@ -1,7 +1,7 @@
 {
   "name": "codex_switch",
   "private": true,
-  "version": "1.5.8",
+  "version": "1.5.9",
   "type": "module",
   "scripts": {
     "dev": "vite",

package.json

@@ -1,6 +1,6 @@
 [package]
 name = "codex_switch"
-version = "1.5.8"
+version = "1.5.9"
 description = "Native Tauri control panel for Codex account switching"
 authors = ["Cmochance"]
 edition = "2021"