♻️ Restructure: Move Astro to repository root

BREAKING CHANGE: Astro project is now at repository root
- Removed dealplustech-astro subdirectory
- Moved all Astro files to root
- Updated PostCSS config to .cjs
- Removed old Next.js files

✅ 11 pages built successfully
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✅ Privacy/Terms links in footer
✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/astro/dist/runtime/client/dev-toolbar/toolbar.d.ts

@@ -1,50 +0,0 @@
-import type { ResolvedDevToolbarApp as DevToolbarAppDefinition } from '../../../types/public/toolbar.js';
-import { type ToolbarAppEventTarget } from './helpers.js';
-import { type Icon } from './ui-library/icons.js';
-import type { Placement } from './ui-library/window.js';
-export type DevToolbarApp = DevToolbarAppDefinition & {
-    builtIn: boolean;
-    active: boolean;
-    status: 'ready' | 'loading' | 'error';
-    notification: {
-        state: boolean;
-        level?: 'error' | 'warning' | 'info';
-    };
-    eventTarget: ToolbarAppEventTarget;
-};
-export declare class AstroDevToolbar extends HTMLElement {
-    shadowRoot: ShadowRoot;
-    delayedHideTimeout: number | undefined;
-    devToolbarContainer: HTMLDivElement | undefined;
-    apps: DevToolbarApp[];
-    hasBeenInitialized: boolean;
-    customAppsToShow: number;
-    constructor();
-    /**
-     * All one-time DOM setup runs through here. Only ever call this once,
-     * in connectedCallback(), and protect it from being called again.
-     */
-    init(): void;
-    connectedCallback(): void;
-    attachEvents(): void;
-    initApp(app: DevToolbarApp): Promise<void>;
-    getAppTemplate(app: DevToolbarApp): string;
-    getAppById(id: string): DevToolbarApp | undefined;
-    getAppCanvasById(id: string): HTMLElement | null;
-    getAppButtonById(id: string): HTMLElement | null;
-    toggleAppStatus(app: DevToolbarApp): Promise<void>;
-    setAppStatus(app: DevToolbarApp, newStatus: boolean): Promise<boolean>;
-    isHidden(): boolean;
-    getActiveApp(): DevToolbarApp | undefined;
-    clearDelayedHide(): void;
-    triggerDelayedHide(): void;
-    setToolbarVisible(newStatus: boolean): void;
-    setNotificationVisible(newStatus: boolean): void;
-    setToolbarPlacement(newPlacement: Placement): void;
-}
-export declare class DevToolbarCanvas extends HTMLElement {
-    shadowRoot: ShadowRoot;
-    constructor();
-    connectedCallback(): void;
-}
-export declare function getAppIcon(icon: Icon): string;