v0.4.2 — Font apply fix + background bleed fix

Fixes in 0.4.2

Font not changing — fixed

Two things were wrong:

1. Tailwind's --font-sans wasn't being updated. Hermes uses both --theme-font-sans (the theme system variable) and Tailwind v4's --font-sans (used by .font-sans utility classes on components). We were only setting the first one. Now both are set together.

2. Typography vars were skipped when falsy. The old code did if (t.fontSans) setProperty(...) — meaning a blank value left the previous theme's font in place. Now every typography variable is always written unconditionally.

Background from another theme appearing — fixed

applyThemeToDom now mirrors Hermes's internal _PREV_DYNAMIC_VAR_KEYS pattern: every --component-* and --theme-asset-* variable written by the previous theme call is tracked and wiped before the new theme's variables are applied. Previously only --theme-asset-bg was cleared; now all asset slots and all component buckets are handled.

Native switcher / F5 reverting to wrong theme — fixed

handleActivate now writes to window.localStorage["hermes-dashboard-theme"] (same key as Hermes's own setTheme()). This means the native bottom-left theme switcher and F5 reload both see the correct active theme instead of whatever was active when the page first loaded.