- Fix AMS filament matching in reprint modal

- Add fuzzy color matching for filament comparison
    Colors within RGB threshold of 40 are considered a match, fixing
    cases where 3MF and printer report slightly different hex values
    for the same filament color (e.g., beige #F5F5DC vs #FCECD6)

  - Add POST /printers/{id}/refresh-status endpoint
    Sends MQTT pushall command to request fresh AMS data from printer

  - Improve Re-read button in filament check section
    - Now triggers backend refresh before refetching status
    - More prominent styling with text label and border
    - 500ms delay after pushall to allow printer to respond

  - Add AMS slot labels to matched filament display
    Shows location like "PLA (AMS-B Slot 3)" instead of just "PLA"

  - Add color hex tooltips on filament color circles

frontend/src/api/client.ts

@@ -1253,6 +1253,10 @@ export const api = {
     ),
   getPrinterStatus: (id: number) =>
     request<PrinterStatus>(`/printers/${id}/status`),
+  refreshPrinterStatus: (id: number) =>
+    request<{ status: string }>(`/printers/${id}/refresh-status`, {
+      method: 'POST',
+    }),
   connectPrinter: (id: number) =>
     request<{ connected: boolean }>(`/printers/${id}/connect`, {
       method: 'POST',