fix: phase 2 — UI-freeze + GDI-leak + panic-on-GDI-exhaustion fixes

- P0: pull blocking HTTPS out from under the global mutex. AppState's
  http and registry now live behind Arc<Client> and Arc<Mutex<Registry>>;
  do_poll, attempt_refresh, and version_action's Apply branch clone
  these out, drop lock_state, then do their I/O. Apply now spawns a
  worker thread that posts WM_APP_UPDATE_APPLIED back to the message-
  only window when the cmd handoff is launched, so the UI no longer
  freezes for the duration of the download.
- P1: bubble.rs paint_text_layer saves and restores the DC's previous
  HFONT before DeleteObject. The old code's DeleteObject on a still-
  selected HFONT silently failed and leaked one handle per paint frame
  (up to ~12/s under the ≥95% pulse animation).
- P1: replace 5x CreatePopupMenu().unwrap() with let-else early returns
  that destroy any half-built menus and log. GDI exhaustion no longer
  panics the UI thread.
- P1: at-most-one-in-flight gate (static AtomicBool) on the poll thread
  so rapid Refresh clicks don't stack concurrent HTTPS calls.
- P1: token-expired balloon now picks the title/body for the provider
  that actually failed, instead of always falling back to Claude when
  show_claude_code is on.
- P1: panel place_near honors SM_XVIRTUALSCREEN / SM_YVIRTUALSCREEN so
  multi-monitor setups with a secondary display left of the primary
  no longer mis-clamp the panel position.
- P1: COUNTDOWN_TEMPLATE bumped from "999d" to "999시간" — Korean has
  the widest suffix among shipped locales and was overflowing the
  countdown column.

Bumps version to 0.1.4.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "claude-code-usage-bubble"
-version = "0.1.3"
+version = "0.1.4"
 edition = "2021"
 license = "Apache-2.0"
 description = "Floating bubble showing Claude Code and Codex usage on Windows"