Operator lever: disable a single file host (e.g. mega.nz when it's banning)
without touching the others. Five booleans on import_settings
(extdl_<host>_enabled, default true — works out of the box, rule #26); the
worker already reads them via getattr so no worker change. Migration 0050 +
model fields + settings GET/PATCH (uniform boolean validation) + a
'External file-host downloads' card in the subscriptions Settings tab.
Completes Phase 4. Refs FC #830.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Operator-flagged 2026-05-28, two asks.
**1. Credential Verify (was missing vs GS — and now actually verifies).**
GS's Verify was a stub (`TODO: implement actual verification` — just
stamped last_verified). FC does a real check, which matters given the
recent auth pain (subscribestar age cookie, HF host-only PHPSESSID):
- GalleryDLService.verify(url, platform, cookies_path, auth_token) runs
gallery-dl in `--simulate --range 1-1` mode (no download) against the
URL with the materialized credentials, then reuses _categorize_error:
returncode 0 / NO_NEW_CONTENT → valid; AUTH_ERROR → invalid; other →
inconclusive (reason surfaced). 45s timeout.
- POST /api/credentials/<platform>/verify picks an enabled Source for
the platform to probe, runs verify, and on success stamps
credential.last_verified (new CredentialService.mark_verified).
Returns {valid: bool|null, reason, last_verified?}. valid=null means
untestable (no credential, or no enabled source to point at).
- CredentialCard gains a Verify button (on credentialed cards) + a
result chip (Verified ✓ / Failed / Untestable) and a toast with the
reason. SettingsTab reloads on @verified so last_verified refreshes.
**2. Live download-activity feedback.** The Downloads tab was static —
no way to tell if downloads were succeeding without manually hitting
Refresh. It now auto-polls: stats every 4s, and the event list too
while anything is queued/running. Polling pauses when the tab is
backgrounded (document.hidden) and the list reload is skipped on idle
ticks to stay light. A pulsing "● live" indicator next to the stat
chips shows when auto-refresh is active (queued+running > 0); honors
prefers-reduced-motion.
Tests: verify endpoint — untestable with no credential, untestable with
no enabled source, valid+stamped on success (gallery-dl mocked), and
auth-failure reported without stamping.
Replaces the three top-level routes with a single `/subscriptions` parent
owning the whole download-pipeline domain. Internal tab state via `?tab=`
query param, mirroring ArtistView's pattern. TopNav auto-drops the two
removed entries (route-driven via meta.title). Bookmark-safe redirects
from `/credentials` and `/downloads` route into the appropriate subtab.
**Subtab 1 — Subscriptions (default).** Carries over the existing
artist-grouped expandable table; adds (a) status filter dropdown, (b)
bulk-select column with Enable/Disable/Delete-all actions, (c) GS-style
color-coded `PlatformChip` per distinct platform in the collapsed row.
Reuses SourceRow, SourceHealthDot, SourceFormDialog, ArtistCreateDialog.
**Subtab 2 — Downloads.** Full GS dashboard. Five colored stat chips up
top (Queued/Running/Completed/Failed/Skipped, sourced from new
`GET /api/downloads/stats?window_hours=`). Popover-style filter UI
(Status/Source/FromDate/ToDate) with active-filter pills below.
Maintenance menu wraps existing /api/import/retry-failed and
/api/import/clear-stuck endpoints; Export-failed-logs item disabled with
a "v2" tooltip. Per-row Retry preserved via existing DownloadEventRow.
**Subtab 3 — Settings.** Four sections: ExtensionKeyBar (top), GS-style
per-platform CredentialCard grid (md=6 v-row/v-col, dashed border if
unset / accent border if set, expandable how-to panel), Downloader card
(rate limit, validate_files), Schedule defaults card (default interval,
event retention, failure warning threshold). The Downloader and Schedule
sections were extracted out of components/settings/ImportFiltersForm.vue
— SettingsView's Import tab now owns only image-import filters.
**Backend:** new `GET /api/downloads/stats` returns
{pending, running, ok, error, skipped} count grouped by status over the
configurable window. Status keys stay raw from the ENUM; UI does the
display-label mapping. Two integration tests pin the response shape +
window_hours validation.
**Util:** `frontend/src/utils/platformColor.js` — single source of truth
for the six platforms' color + icon + label, mirroring GS's palette
(patreon=red mdi-patreon, subscribestar=amber mdi-star,
hentaifoundry=purple mdi-palette, discord=indigo mdi-discord,
pixiv=blue mdi-alpha-p-box, deviantart=green mdi-deviantart). Unknown
platform falls back to grey + mdi-web.
Deferred (explicit non-goals): subscription import/export, "Trigger Due
Now" scheduler-tick button (needs new backend endpoint), Export Failed
Logs CSV dump.
bvandeusen