fix(rewards): add support for new /earn dashboard and Explore on Bing activities (fixes #603)

[phanex]

Summary of Changes

Microsoft Rewards has been transitioning cards and activities to the new /earn tab rendered via Next.js React Server Components (RSC). This PR introduces native, language-agnostic parsing for the new format and ensures "Explore on Bing" cards are properly discovered and completed.

1. Dynamic RSC Component Parsing (ReactFunc.ts):

   • Added findTextByClass() — a recursive tree-walker that extracts title, description, and points from RSC flight chunks using Fluent UI design tokens (text-globalBody2Strong, text-fgCtrlNeutralSecondaryRest, text-statusInformativeTintFg).
   • Works 100% dynamically across all locales/languages without any hardcoded activity IDs, queries, or localized words.
   • Cleans up invisible zero-width Unicode characters (\u200B-\u200D, \uFEFF) embedded by Microsoft's server-rendered text.
   • Preserves standard 10-point default for exploreonbing cards when shared badge elements are deduplicated into external flight chunk references ($Lxx).

2. Universal Quest Completion Regex (ReactFunc.ts):

   • Simplified the task progress regex to (\d+)\s*\/\s*(\d+), relying solely on the universal fractional slash format (1/1, 1/5) present across all localized interfaces (instead of matching English "tasks").
   • Improved region boundary detection between parent quests.

3. Centralized Promotion Adapter (offerAdapter.ts):

   • Extracted ParsedOffer to BasePromotion conversion into a single reusable adapter with safe defaults (exclusiveLockedFeatureStatus, priority, activityType) to maintain DRY and prevent downstream type issues.

4. RSC Fallbacks in Activity Runners:

   • In DailySet.ts and MorePromotions.ts, added fallback to reactSnapshot.offers / reactSnapshot.reportable when the legacy dashboard API returns an empty list.
   • In PromotionActivityRunner.ts, check both name and offerId for exploreonbing.

5. Aligned Server Action Context (UrlReward.ts):

   • Updated url, referer, and routerStateTree from legacy dashboard to earn to match the bootstrap context and default BrowserFunc behavior.

Testing

• Tested against live accounts in multiple locales (including German de-DE).
• Verified all active "Explore on Bing" cards are detected, searched on Bing, and credited successfully.
• Verified tomorrow/locked cards are properly skipped.
• TypeScript build (npm run build) passes with 0 errors.

#603