## Why

The homepage wallet entry currently displays the raw wallet balance value returned by the backend, which is cent-based. This causes incorrect user-facing values such as showing `100` instead of `1`. In addition, the wallet recharge order list always renders the auto purchase row, which can show misleading fallback text when the backend does not provide auto purchase data.

## What Changes

- Convert the homepage wallet entry balance from cents to yuan before rendering the value inside `钱包(...)`
- Keep the homepage wallet entry aligned with user-facing currency expectations instead of exposing the raw cent amount
- Render the recharge order `自动购包` field only when the recharge order includes auto purchase status data
- Preserve the current auto purchase status text mapping when the field exists, including existing compatibility values

## Capabilities

### New Capabilities
- `wallet-display-rules`: Define wallet-related UI display rules for homepage balance presentation and recharge order field visibility

### Modified Capabilities

## Impact

- Affected code: `components/FunctionCard.vue`, `pages/index/index.vue`, `pages/my-wallet/my-wallet.vue`
- Affected UI flows: homepage function menu wallet entry, wallet recharge order list
- No backend API changes
- No payment flow changes
