fix(hyprland): migrate window rules to Hyprland 0.53+ syntax

The default desktop showed a red Hyprland config-error banner on every
boot, occluding the Waybar. Root cause: Hyprland 0.53 rewrote window
rules — the `windowrulev2` keyword is a hard error and the old
rule-first order (`float, class:^…$`) no longer parses, so the float
rules were not applying either. Confirmed against the Hyprland 0.55.4
source (`handleWindowrule`): each comma field is now `<keyword> <value>`,
so effects carry a value and matchers take a `match:` prefix.

Migrated the 7-rule block to `float 1, match:class ^…$` form.

Verified: V0 nix flake check --no-build; built the generated
hyprland.conf; V2 theme-shot re-render — banner gone, themed Waybar
renders. Journal + MEMORY gotcha added.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

agent/MEMORY.md

@@ -103,6 +103,11 @@ iteration would otherwise rediscover.
 - Update order matters downstream: `sys-update` (lock) before
   `home-update`, or desktop changes are silently skipped against the old
   lock (README § 3).
+- Hyprland 0.53 rewrote window rules: `windowrulev2` is a hard error and
+  the old rule-first `float, class:^…$` no longer parses — both surface a
+  red config-error banner on the default desktop. Hyprlang legacy form is
+  now `<effect> <value>, match:<prop> ^…$` (e.g. `float 1, match:class ^…$`);
+  effects carry a value, matchers take `match:` (§ windowrule migration).
 - grub `loadfont`s every `.pf2` in a theme dir — reuse a bundled DejaVu
   rather than shipping fonts (§ Distro branding).
 - The Claude Code harness drops machine-local files into the repo