Replace mock data layer with live Soroban contract calls in services.ts

[Prasiejames]

Description

The src/lib/contracts/services.ts file currently wraps mock data from constants.ts. For production, it needs to call actual Soroban smart contracts deployed on Stellar.

Requirements

• Replace each fetch* function with real rpc.Server calls using the contract IDs from src/lib/contracts/addresses.ts
• Use buildAndSendContractCall from src/lib/contracts/client.ts for mutations
• Keep the mock data as a fallback when no wallet is connected or contracts are unreachable
• All functions must preserve their exact return types (Asset[], Investor[], etc.)

Relevant files

• src/lib/contracts/services.ts
• src/lib/contracts/client.ts
• src/lib/contracts/addresses.ts

Complexity: High (200 pts)

Requires understanding Soroban contract interaction, the existing client layer, and careful type mapping from ScVal to the app types.