Organize shared code across web, mobile, and SDK UI projects

Centralized common code into shared/ folder to eliminate duplication and
improve maintainability across all three frontend projects (web, mobile,
pezkuwi-sdk-ui).

Changes:
- Added token types and constants to shared/types/tokens.ts
  - TokenInfo, PoolInfo, SwapQuote, and other DEX types
  - KNOWN_TOKENS with HEZ, PEZ, wUSDT definitions
  - Token logos (🟡🟣💵)

- Added Kurdistan color palette to shared/constants/
  - Kesk, Sor, Zer, Spî, Reş color definitions

- Added TOKEN_DISPLAY_SYMBOLS mapping (USDT vs wUSDT)

- Updated blockchain configuration in shared/blockchain/polkadot.ts
  - Added beta testnet endpoint (wss://beta-rpc.pezkuwi.art)
  - Defined DEFAULT_ENDPOINT constant

- Moved i18n to shared/i18n/
  - Centralized translation files for 6 languages (EN, TR, KMR, CKB, AR, FA)
  - Added LANGUAGES configuration with RTL support
  - Created isRTL() helper function

- Updated web and mobile to import from shared
  - web/src/types/dex.ts now re-exports from shared
  - web/src/contexts/PolkadotContext.tsx uses DEFAULT_ENDPOINT
  - mobile/src/i18n/index.ts uses shared translations
  - mobile/src/contexts/PolkadotContext.tsx uses DEFAULT_ENDPOINT

- Updated shared/README.md with comprehensive documentation

This architecture reduces code duplication and ensures consistency across
all frontend projects.

web/src/contexts/PolkadotContext.tsx

@@ -2,6 +2,7 @@ import React, { createContext, useContext, useEffect, useState, ReactNode } from
 import { ApiPromise, WsProvider } from '@polkadot/api';
 import { web3Accounts, web3Enable, web3FromAddress } from '@polkadot/extension-dapp';
 import type { InjectedAccountWithMeta } from '@polkadot/extension-inject/types';
+import { DEFAULT_ENDPOINT } from '../../../shared/blockchain/polkadot';
 
 interface PolkadotContextType {
   api: ApiPromise | null;
@@ -24,7 +25,7 @@ interface PolkadotProviderProps {
 
 export const PolkadotProvider: React.FC<PolkadotProviderProps> = ({
   children,
-  endpoint = 'wss://beta-rpc.pezkuwi.art' // Beta testnet RPC
+  endpoint = DEFAULT_ENDPOINT // Beta testnet RPC from shared config
 }) => {
   const [api, setApi] = useState<ApiPromise | null>(null);
   const [isApiReady, setIsApiReady] = useState(false);

web/src/types/dex.ts

@@ -1,108 +1,14 @@
-export interface TokenInfo {
-  id: number;
-  symbol: string;
-  name: string;
-  decimals: number;
-  logo?: string;
-}
+// Re-export shared types and constants
+export {
+  type TokenInfo,
+  type PoolInfo,
+  type UserLiquidityPosition,
+  type SwapQuote,
+  type AddLiquidityParams,
+  type RemoveLiquidityParams,
+  type SwapParams,
+  type PoolCreationParams,
+  TransactionStatus,
+} from '../../../shared/types/tokens';
 
-export interface PoolInfo {
-  id: string; // asset1-asset2 pair
-  asset1: number;
-  asset2: number;
-  asset1Symbol: string;
-  asset2Symbol: string;
-  asset1Decimals: number;
-  asset2Decimals: number;
-  reserve1: string; // Raw balance string
-  reserve2: string;
-  lpTokenSupply: string;
-  volume24h?: string;
-  tvl?: string;
-  apr7d?: string;
-  feeRate?: string;
-}
-
-export interface UserLiquidityPosition {
-  poolId: string;
-  asset1: number;
-  asset2: number;
-  lpTokenBalance: string;
-  shareOfPool: string; // Percentage as string (e.g., "2.5")
-  asset1Amount: string;
-  asset2Amount: string;
-  valueUSD?: string;
-  feesEarned?: string;
-}
-
-export interface SwapQuote {
-  amountIn: string;
-  amountOut: string;
-  path: number[]; // Asset IDs in route
-  priceImpact: string; // Percentage as string
-  minimumReceived: string; // After slippage
-  route: string; // Human readable (e.g., "wHEZ → PEZ → wUSDT")
-}
-
-export interface AddLiquidityParams {
-  asset1: number;
-  asset2: number;
-  amount1: string;
-  amount2: string;
-  amount1Min: string;
-  amount2Min: string;
-  recipient: string;
-}
-
-export interface RemoveLiquidityParams {
-  asset1: number;
-  asset2: number;
-  lpTokenAmount: string;
-  amount1Min: string;
-  amount2Min: string;
-  recipient: string;
-}
-
-export interface SwapParams {
-  path: number[];
-  amountIn: string;
-  amountOutMin: string;
-  recipient: string;
-  deadline?: number;
-}
-
-export interface PoolCreationParams {
-  asset1: number;
-  asset2: number;
-  feeRate?: number;
-}
-
-// Known tokens on testnet
-export const KNOWN_TOKENS: Record<number, TokenInfo> = {
-  0: {
-    id: 0,
-    symbol: 'wHEZ',
-    name: 'Wrapped HEZ',
-    decimals: 12,
-  },
-  1: {
-    id: 1,
-    symbol: 'PEZ',
-    name: 'Pezkuwi Token',
-    decimals: 12,
-  },
-  2: {
-    id: 2,
-    symbol: 'wUSDT',
-    name: 'Wrapped USDT',
-    decimals: 6,
-  },
-};
-
-// Transaction status
-export enum TransactionStatus {
-  IDLE = 'idle',
-  PENDING = 'pending',
-  SUCCESS = 'success',
-  ERROR = 'error',
-}
+export { KNOWN_TOKENS, TOKEN_DISPLAY_SYMBOLS } from '../../../shared/constants';