Restructure Settings nav, modernize import page, dedup/genres UX polish

Settings is now one top-nav entry with Credentials and Jobs as sidebar
sub-pages (jobs moved from /jobs to /settings/jobs). Manual import page
replaces the bare file input and free-text filename field with a drag-drop
dropzone and a proper file-picker table. Genres page drops the "force"
checkbox for two explicit buttons (Preview / Fix genres now). Dedup's
"Scan now" runs both the file-naming and acoustic passes together, and the
table labels which pass caught each candidate instead of showing the raw
pass name. .btn-ghost gets a visible border so it reads as a real button
next to Delete/Danger actions instead of looking unaligned. Job names
throughout the UI are now human-readable instead of raw job_key strings.

Also includes the fpcalc exit-code fix from earlier (fingerprint index
was discarding valid fingerprints on files with a benign decode warning).

app/routers/genres.py

@@ -28,8 +28,17 @@ async def genres_index(request: Request, user: dict = Depends(require_auth), db=
 
 
 @router.post("/scan")
-async def scan(force: bool = Form(False), user: dict = Depends(require_auth)):
-    await genre_review_service.run(apply=False, force=force, triggered_by="manual")
+async def scan(user: dict = Depends(require_auth)):
+    # Always force=True: matches the weekly scheduled run's own behavior
+    # (see genre_review_service.run's docstring), so a preview accurately
+    # shows what "Fix genres now" would actually do.
+    await genre_review_service.run(apply=False, force=True, triggered_by="manual")
+    return RedirectResponse(url="/genres", status_code=303)
+
+
+@router.post("/apply")
+async def apply(user: dict = Depends(require_auth)):
+    await genre_review_service.run(apply=True, force=True, triggered_by="manual")
     return RedirectResponse(url="/genres", status_code=303)