[FE] Persist quest edit via draft API

[Kaylahray]

Description

/creator/quests/[id]/edit currently logs and redirects. Save through POST /missions/drafts (or future update endpoint) with JWT.

User Story

As a Founder,
I want edits to my mission draft to persist,
so that I don’t lose work.

Requirements and Context

• Files: app/creator/quests/[questId]/edit/page.tsx, draft DTO
• Remove stub TODO; success/error toasts; redirect back to detail on success

Suggested Implementation

// POST /missions/drafts with Bearer token
// body matches SaveDraftDto

Acceptance Criteria

• Save calls backend draft endpoint
• Success redirects to detail
• Errors shown to user
• Stub console.log removed

Submission Guidelines

• Branch: feat/fe-creator-edit-draft
• Depends on: [FE] SEP-10 login on creator routes
• PR: feat(frontend): persist quest edit via drafts API

[tecmalik]

@tecmalik has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

please assign this issue to me i would love to work on it

ℹ️ Repo Maintainers: To accept this application, review their application or assign @tecmalik to this issue.

[limxiy]

@limxiy has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Can I work on this issue please

ℹ️ Repo Maintainers: To accept this application, review their application or assign @limxiy to this issue.

[drips-wave]

Congratulations, @limxiy! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @limxiy: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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