feat(i18n): complete migration to centralized translations (en+zh+es)

[xsa-dev]

Summary

Complete i18n infrastructure refactor for NOFX strategy components.

This PR consolidates scattered i18n strings and adds Spanish translations for 8 components.

What This PR Does

1. Creates web/src/i18n/strategy-translations.ts

   • 275+ centralized translation keys
   • 8 sections: coinSource, gridConfig, gridRisk, riskControl, promptSections, indicator, publishSettings, chartTabs
   • All keys in English (en), Chinese (zh), and Spanish (es)

2. Migrates 8 Strategy Components to centralized pattern:

   • CoinSourceEditor.tsx - Data source configuration
   • GridRiskPanel.tsx - Risk display panel
   • RiskControlEditor.tsx - Risk settings
   • GridConfigEditor.tsx - Grid parameters
   • PromptSectionsEditor.tsx - AI prompt customization
   • IndicatorEditor.tsx - Technical indicators
   • PublishSettingsEditor.tsx - Publishing options
   • ChartTabs.tsx - Chart navigation

Migration Pattern

BEFORE (anti-pattern):

// Inline translation objects in each component
const labels = {
  key: { zh: '中文', en: 'English' },
}
{t('key')[language]}

AFTER (standard pattern):

// Centralized translations.ts
import { coinSource } from 'i18n/strategy-translations'
t(coinSource.sourceType, language)

Files Changed

• web/src/i18n/strategy-translations.ts (new)
• 8 component files updated

Stats

• Translation Keys: 275+
• Languages: 3 (en, zh, es)
• Components Migrated: 8
• Lines Added: ~700
• Lines Removed: ~2,400 (consolidation)

Related PRs

• I8n improvements NoFxAiOS/nofx#1343 (maker95): es language additions for main pages
• feat(i18n): add 42 translation keys for TraderConfigModal NoFxAiOS/nofx#1374 (xsa-dev): zh translations for TraderConfigModal
• feat(i18n): add consolidated translation keys for strategy components NoFxAiOS/nofx#1375: Previous consolidation PR (superseded by this complete migration)

Testing

After merge, verify:

1. All 8 components render correctly in English
2. All 8 components render correctly in Chinese (中文)
3. All 8 components render correctly in Spanish (Español)
4. No console errors related to missing translations