feat(weekly-brief): add shared interfaces for weekly brief domain

[manishdixitlfx]

Tracking: LFXV2-1981 (part of Epic LFXV2-1976)

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Summary

Adds the @lfx-one/shared TypeScript interfaces for the WG Weekly Brief feature. Pure type additions — no runtime code.

What's new

• packages/shared/src/interfaces/weekly-brief.interface.ts:
  • WeeklyBriefState union (empty | generating | generated | edited | approved | error)
  • WeeklyBriefSourceRef — claim_id + source provenance for citations
  • WeeklyBrief — full draft entity matching the committee-service domain shape
  • WeeklyBriefThrottle — per-committee/per-week generate + regenerate counters
  • WeeklyBriefCurrentResponse, request/response shapes
• packages/shared/src/interfaces/index.ts exports

Shapes mirror the committee-service Goa types so the BFF can pass through without remapping.

Stack

PR 1/4 on lfx-self-serve. Independent base = main. PRs #6-8 stack on top.

Test plan

• yarn lint / yarn build green (verified)
• Types compile cleanly across the monorepo

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✨ Finishing Touches

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• Commit unit tests in branch feat/wg-weekly-brief-shared-interfaces

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[Copilot]

Pull request overview

Adds new Weekly Brief domain TypeScript interfaces to @lfx-one/shared so downstream apps/services (e.g., BFF) can share the committee-service-aligned shapes without remapping.

Changes:

• Introduced WeeklyBrief* domain interfaces/types (state, entities, throttle, request/response shapes).
• Exported the new Weekly Brief interfaces via the shared interfaces barrel.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
packages/shared/src/interfaces/weekly-brief.interface.ts	Adds Weekly Brief domain types/interfaces (state, entity, throttle, API shapes).
packages/shared/src/interfaces/index.ts	Re-exports the Weekly Brief interfaces from the shared interfaces barrel.

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[manishdixitlfx]

Review Feedback Addressed

Commit: cc5c4af

Changes Made (per copilot-pull-request-reviewer)

• packages/shared/src/interfaces/weekly-brief.interface.ts: introduced a closed WeeklyBriefSourceType union and use it on WeeklyBriefSourceRef.source_type. Restores type-safety at every call site.

Threads Resolved

1 of 1 unresolved threads addressed in this iteration.