feat(website): implement PDPA cookie consent banner and script manager (#14)

### Overview
Implement PDPA & GDPR compliant Cookie Consent Management Platform (CMP) for pps/website:
- **Zustand Store (cookieConsentStore.ts):** Stores consent record (
ecessary, nalytics, marketing) in localStorage with skipHydration: true for Next.js SSR safety.
- **Cookie Banner (CookieBanner.tsx):** Fixed bottom floating banner with Quiet Luxury styling, providing Accept All, Reject Non-Essential, and Customize buttons.
- **Preferences Modal (CookiePreferencesModal.tsx):** Detailed modal dialog allowing users to granularly toggle Analytics and Marketing cookies (Strictly Necessary is locked).
- **Script Manager (ScriptManager.tsx):** Coordinates Google Consent Mode v2 (nalytics_storage, d_storage), conditionally injects GA4, Meta Pixel, and TikTok Pixel, and dispatches homaroma:consent-change DOM events.
- **Footer Revocation Link:** Added Cookie Preferences link in the Support column of Footer.tsx so users can modify/revoke consent anytime.
- **Multilingual Support:** Added localized text for TH, EN, JA, and ZH.

---------

Co-authored-by: Your Name <you@example.com>
Reviewed-on: #14
Co-authored-by: antigravity-bot <bot@kittisak.com>

apps/website/src/store/cookieConsentStore.ts

@@ -0,0 +1,124 @@
+import { create } from 'zustand';
+import { persist } from 'zustand/middleware';
+
+export const CURRENT_CONSENT_VERSION = '1.0';
+
+export interface CookiePreferences {
+  necessary: boolean;
+  analytics: boolean;
+  marketing: boolean;
+}
+
+export interface CookieConsentRecord {
+  hasResponded: boolean;
+  version: string;
+  timestamp: string | null;
+  preferences: CookiePreferences;
+}
+
+interface CookieConsentState {
+  record: CookieConsentRecord;
+  isPreferencesOpen: boolean;
+  isHydrated: boolean;
+  
+  // Actions
+  setHydrated: (hydrated: boolean) => void;
+  openPreferences: () => void;
+  closePreferences: () => void;
+  acceptAll: () => void;
+  rejectAll: () => void;
+  savePreferences: (preferences: Partial<CookiePreferences>) => void;
+  resetConsent: () => void;
+}
+
+const DEFAULT_RECORD: CookieConsentRecord = {
+  hasResponded: false,
+  version: CURRENT_CONSENT_VERSION,
+  timestamp: null,
+  preferences: {
+    necessary: true,
+    analytics: false,
+    marketing: false,
+  },
+};
+
+export const useCookieConsentStore = create<CookieConsentState>()(
+  persist(
+    (set) => ({
+      record: DEFAULT_RECORD,
+      isPreferencesOpen: false,
+      isHydrated: false,
+
+      setHydrated: (hydrated: boolean) => set({ isHydrated: hydrated }),
+
+      openPreferences: () => set({ isPreferencesOpen: true }),
+      closePreferences: () => set({ isPreferencesOpen: false }),
+
+      acceptAll: () => {
+        const now = new Date().toISOString();
+        set({
+          record: {
+            hasResponded: true,
+            version: CURRENT_CONSENT_VERSION,
+            timestamp: now,
+            preferences: {
+              necessary: true,
+              analytics: true,
+              marketing: true,
+            },
+          },
+          isPreferencesOpen: false,
+        });
+      },
+
+      rejectAll: () => {
+        const now = new Date().toISOString();
+        set({
+          record: {
+            hasResponded: true,
+            version: CURRENT_CONSENT_VERSION,
+            timestamp: now,
+            preferences: {
+              necessary: true,
+              analytics: false,
+              marketing: false,
+            },
+          },
+          isPreferencesOpen: false,
+        });
+      },
+
+      savePreferences: (userPrefs: Partial<CookiePreferences>) => {
+        const now = new Date().toISOString();
+        set((state) => ({
+          record: {
+            hasResponded: true,
+            version: CURRENT_CONSENT_VERSION,
+            timestamp: now,
+            preferences: {
+              necessary: true,
+              analytics: Boolean(userPrefs.analytics),
+              marketing: Boolean(userPrefs.marketing),
+            },
+          },
+          isPreferencesOpen: false,
+        }));
+      },
+
+      resetConsent: () => {
+        set({
+          record: DEFAULT_RECORD,
+          isPreferencesOpen: false,
+        });
+      },
+    }),
+    {
+      name: 'homaroma-cookie-consent',
+      partialize: (state) => ({ record: state.record }),
+      skipHydration: true,
+      onRehydrateStorage: () => (state) => {
+        state?.setHydrated(true);
+      },
+    }
+  )
+);