feat(gui): Sync — IBD progress + backfill + troubleshooting

[Noyi-24-7]

Summary

Sync screen for Floresta GUI (v0).

Goal: show syncing progress clearly, explain what’s happening, and provide fast troubleshooting links (Peers/Logs).

Parent index: #1

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Frame

• Frame 07 — Sync: FIGMA_LINK_FRAME_07

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Sections

A) Sync progress

• Step (e.g., 2/3)
• Progress % bar
• Height → Target height
• Behind blocks estimate
• Peers count + optional transport detail (v2/v1)

B) Timeline + “what this means”

• Timeline (Headers ✅ / Blocks ⏳ / Catch-up ⏸) if available
• Friendly explanation: “Floresta checks Bitcoin rules as it downloads data.”

C) Backfill (if enabled)

• Backfill progress % with explanation
• Optional pause/resume (if supported; otherwise omit)

D) Actions

• View Peers
• Open Logs
• Refresh / Retry (depending on state)

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States covered

• READY: normal progress
• LOADING: calculating progress / skeleton values (Coming Soon!!)
• EMPTY: peers=0 → “Waiting for peers. Sync can’t continue.” + Go to Peers (Coming Soon!!)
• ERROR: sync stopped + Open Logs + Retry (Coming Soon!!)
• LOCKED: disable actions if not supported / requires settings (Coming Soon!!)

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Questions

1. Should Backfill always live on Sync (and optionally summarized on Overview), or Sync-only?
2. Any preferred troubleshooting copy for “no peers”?

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Acceptance notes (implementation later)

• Desktop-first
• Most common failure paths are one click away (Peers, Logs)
• Copy stays simple and user-friendly

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