chore(ui): refactor workspace to monorepo (#70)

## Summary by Sourcery

Refactor the UI project structure into a pnpm monorepo packages layout
and align tooling and automation with the new paths.

Enhancements:
- Reorganize the UI app from the root ui directory into packages/ui
within a pnpm workspace.
- Update pnpm workspace configuration to include all packages under
packages/*.
- Adjust paths in changeset configuration so the @dropout/ui package
resolves from packages/ui.

Build:
- Update pre-commit configuration paths and arguments to reflect the new
UI location and normalize hook argument formatting.
- Update Dependabot configuration so npm updates target /packages/ui
instead of /ui.

CI:
- Update GitHub Actions workflows to watch packages/** instead of ui/**
and to run frontend tasks from packages/ui.
- Update pnpm cache dependency paths in workflows to use the root
pnpm-lock.yaml.
- Simplify frontend install steps in test workflows to run from the
repository root.

Chores:
- Add a new index.html under packages/ui and remove the old
ui/index.html to match the new project layout.

1 files changed, 32 insertions, 0 deletions

diff --git a/packages/ui/src/stores/ui.svelte.ts b/packages/ui/src/stores/ui.svelte.ts
new file mode 100644
index 0000000..e88f6b4
--- /dev/null
+++ b/packages/ui/src/stores/ui.svelte.ts
@@ -0,0 +1,32 @@
+import { type ViewType } from "../types";
+
+export class UIState {
+  currentView: ViewType = $state("home");
+  status = $state("Ready");
+  showConsole = $state(false);
+  appVersion = $state("...");
+
+  private statusTimeout: ReturnType<typeof setTimeout> | null = null;
+
+  setStatus(msg: string) {
+    if (this.statusTimeout) clearTimeout(this.statusTimeout);
+
+    this.status = msg;
+
+    if (msg !== "Ready") {
+      this.statusTimeout = setTimeout(() => {
+        this.status = "Ready";
+      }, 5000);
+    }
+  }
+
+  toggleConsole() {
+    this.showConsole = !this.showConsole;
+  }
+
+  setView(view: ViewType) {
+    this.currentView = view;
+  }
+}
+
+export const uiState = new UIState();