refactor(ui): full rewrite instance and code struct (#129)

## Summary by Sourcery

Refactor the UI to modernize effect handling, routing, and legacy APIs
while adding a reusable alert dialog component and cleaning up obsolete
stores.

New Features:
- Introduce a shared SaturnEffect context via ParticleBackground so
pages can access the effect without relying on global window APIs.
- Add a Base UI–powered alert dialog component for consistent
confirmation and warning flows across the app.
- Define a central router configuration module with instance routes to
standardize page wiring.

Bug Fixes:
- Ensure SaturnEffect nullish checks are handled safely when forwarding
pointer and touch events from the home view.

Enhancements:
- Rewrite ParticleBackground to manage its own SaturnEffect lifecycle
via React state and context instead of global accessors.
- Update the home view to use the SaturnEffect hook, simplify
pointer/touch handlers, and remove legacy game and release store usage.
- Refine layout and accessibility attributes for various form field and
label components, including field grouping and error rendering keys.
- Simplify sidebar navigation and adjust the user dropdown trigger to
work with the updated dropdown menu API.
- Wrap the root outlet for the home route with ParticleBackground only
on the index path to limit the effect to the intended view.
- Clean up imports and code style in radio group and other UI primitives
for consistency.

Chores:
- Remove deprecated UI stores and utility modules that are no longer
used with the new architecture.
- Add changeset entries documenting the Saturn effect refactor,
ParticleBackground rewrite, and removal of legacy store code.

1 files changed, 0 insertions, 42 deletions

diff --git a/packages/ui/src/stores/ui-store.ts b/packages/ui/src/stores/ui-store.ts
deleted file mode 100644
index 89b9191..0000000
--- a/packages/ui/src/stores/ui-store.ts
+++ /dev/null
@@ -1,42 +0,0 @@
-import { create } from "zustand";
-
-export type ViewType = "home" | "versions" | "settings" | "guide" | "instances";
-
-interface UIState {
-  // State
-  currentView: ViewType;
-  showConsole: boolean;
-  appVersion: string;
-
-  // Actions
-  toggleConsole: () => void;
-  setView: (view: ViewType) => void;
-  setAppVersion: (version: string) => void;
-}
-
-export const useUIStore = create<UIState>((set) => ({
-  // Initial state
-  currentView: "home",
-  showConsole: false,
-  appVersion: "...",
-
-  // Actions
-  toggleConsole: () => {
-    set((state) => ({ showConsole: !state.showConsole }));
-  },
-
-  setView: (view: ViewType) => {
-    set({ currentView: view });
-  },
-
-  setAppVersion: (version: string) => {
-    set({ appVersion: version });
-  },
-}));
-
-// Provide lowercase alias for compatibility with existing imports.
-// Use a function wrapper to ensure the named export exists as a callable value
-// at runtime (some bundlers/tree-shakers may remove simple aliases).
-export function useUiStore() {
-  return useUIStore();
-}