Brickser AI 1.5.3 — Bricks 2.4 support and stability fixes

Bricks 2.4 support — Brickser now loads correctly on the new Bricks 2.4 toolbar, wherever you dock it, and inserting or saving sections no longer fails silently
"Connect AI" button — the chat box shows a clear Connect AI button until you've added your AI key, and DeepSeek is now offered during setup
Smarter style edits — the AI now sees your full class settings and spacing scale, so style changes land more accurately
Design system fixes — reinstalling no longer creates duplicate variables or shows the Spacing block twice, keeps your fonts, and older design-system pages render correctly again
Font fixes — uploaded custom fonts now show their real name and load properly on the live site
Export fixes — every category and tag is exported, and code snippets keep their on/off state