Add batch upload configure modal and settings mapping utilities.

Users configure share mode, expiry, and max views before upload; batch summary confirms choices above the queue.

docs/UPLOAD_PR_PLAN.md

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+# Upload flow PR plan
+
+## Phase 1 — Configure UI (done)
+
+- [x] Split upload page: dropzone, queue, metadata inspector, configure modal
+- [x] Batch settings form (ZK / hotlink, expiry, max views, ZK password)
+- [x] Preset → API helpers (`resolveUploadBatchExpiresAt`, `resolveUploadBatchMaxViews`, ZK prepare options builder)
+- [x] Modal validation on Upload; batch settings summary after confirm
+
+## Phase 2 — Upload execution + dual queue status (in progress)
+
+- [ ] **Separate upload state** from metadata (`UploadQueueEntry` per file key); metadata column unchanged in `UploadQueueList`
+- [ ] Show upload column once a batch upload has started (pending / uploading / uploaded / failed / skipped)
+- [ ] `onBatchUpload`: stripped blob → encrypt → `useUploadStore` POST (ZK + hotlink)
+- [ ] Share URLs via `buildZkViewerPath` / `buildHotlinkImagePath` (+ optional absolute URL from `VITE_CLEARNET_DOMAIN`)
+- [ ] Disable dropzone / configure while batch upload runs; clear upload state on new pick
+
+## Phase 3 — Hardening (follow-up or tail of PR)
+
+- [ ] ALTCHA: fetch challenge + solve, pass `x-altcha` on upload (frontend not wired yet; backend may allow when disabled)
+- [ ] Copy-to-clipboard for share links; optional delete token display
+- [ ] Modal Esc / backdrop close
+- [ ] Single validation gate (modal vs builder)
+
+## Out of scope
+
+- Viewer / delete pages
+- E2E tests against docker-compose