Feat: AI Credit History tab for AI credits widget

[blueogin]

Short description

Split AI credit history out of the Manage tab into its own top-level tab in the AI credits widget. Today history lives in a collapsed UsageLog card on Manage and is loaded via the legacy account credit payload. The local AntSeed backend now exposes a dedicated paginated history endpoint — the widget should use that.

UI implementation reference

Mock design (target layout for the new History tab):

AI credit history
Source:  [✓ Deposit] [✓ Stream update] [✓ Stream request] [ ] Auto (cron)
Status:  [All ▾]
Date:    [ From 0001-01-01 ]  [ To 9999-12-31 ]
┌─────────────────────────────────────────────────────────┐
│ G$ deposit · Jun 25, 2026 · +0.66 cr · funded      ⓘ  │
│ Stream update · Jun 24, 2026 · 10 G$/mo            ⓘ  │
│ Stream credit · Jun 23, 2026 · +0.12 cr · pending ⓘ  │
└─────────────────────────────────────────────────────────┘
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