fix(slicer): preset visibility + lookup precedence + signed-out banner + AMS slot badges (#1712)

Four #1712 issues from the 2026-06-04 Orca Cloud integration:

  (1) Tier order put Orca Cloud above everything across SliceModal,
  auto-pick scoring, dropdown groups, the AMS slot picker, and the
  backend precedence. Bambu-Cloud-only users saw their profiles
  deprioritised behind an empty Orca tier.

  (2) Cross-tier dedup hid a same-named preset in all but the highest-
  priority tier. A user with both a local-imported and an Orca-synced
  "Bambu PLA Basic" couldn't see the Orca copy as a picker option.

  (3) CloudStatusBanner nagged signed-out users with a permanent
  "Sign in to Orca Cloud" line at the top of every slice -- even after
  explicit logout. Bambu Cloud had the symmetric problem.

  (4) ConfigureAmsSlotModal source badges were inconsistent: Orca rows
  showed only "Custom" (no source identity), Bambu Cloud built-in rows
  had no badge at all, and the orthogonal isUser-driven "Custom" badge
  collided with the source badge for cloud user presets.

  Order is local > orca_cloud > cloud > standard everywhere it lives
  (SliceModal SLICE_MODAL_TIER_ORDER + TIER_BONUS + dropdown tier list,
  ConfigureAmsSlotModal sourceOrder, and backend precedence). The order
  drives auto-pick + visual group rendering; it does NOT hide profiles.

  _dedupe_by_name replaced with _enrich_cloud_metadata: every tier
  returns its full list across all three slots (printer / process /
  filament). The function still backfills Bambu Cloud filament metadata
  from same-named local / orca_cloud / standard entries so cloud
  filaments score in pickFilamentForSlot.

  CloudStatusBanner silently no-ops on not_authenticated for both clouds;
  expired / unreachable still surface. The not_authenticated i18n keys
  stay in the locale files dormant.

  ConfigureAmsSlotModal: one source badge per row, one colour per source
  (green Local / purple Orca Cloud / bambu-blue Bambu Cloud / amber
  Built-in). The legacy isUser-driven "Custom" badge is gone; every row
  identifies its tier consistently.

frontend/src/api/client.ts

@@ -1464,8 +1464,9 @@ export interface UnifiedPresetsBySlot {
   filament: UnifiedPreset[];
 }
 export interface UnifiedPresetsResponse {
-  // Priority order: orca_cloud > cloud > local > standard. Dedup is applied
-  // backend-side so each name appears in only one tier.
+  // Priority order: local > orca_cloud > cloud > standard. No cross-tier
+  // dedup — every tier surfaces its full list so the user can pick from
+  // any source. The order drives auto-pick + visual group rendering only.
   orca_cloud: UnifiedPresetsBySlot;
   cloud: UnifiedPresetsBySlot;
   local: UnifiedPresetsBySlot;