- Spoolman: Add link spool feature, UUID display, and sync feedback

- Link to Spoolman: Manually link existing Spoolman spools to AMS trays
    - Hover over AMS slot to see "Link to Spoolman" button
    - Select from list of unlinked Spoolman spools
    - Automatically sets extra.tag field in Spoolman
  - Spool UUID display: View and copy Bambu Lab spool UUID in AMS hover card
    - Shows first 8 chars with copy button (full UUID to clipboard)
    - Fallback copy method for HTTP contexts
  - Sync feedback: Shows synced count and skipped spools with reasons
    - Expandable list when more than 5 skipped
    - Color swatches for identification
  - Fixed Spoolman 400 Bad Request: extra field values must be valid JSON
  - Updated documentation (wiki, website)

frontend/src/api/client.ts

@@ -1119,12 +1119,30 @@ export interface SpoolmanStatus {
   url: string | null;
 }
 
+export interface SkippedSpool {
+  location: string;
+  reason: string;
+  filament_type: string | null;
+  color: string | null;
+}
+
 export interface SpoolmanSyncResult {
   success: boolean;
   synced_count: number;
+  skipped_count: number;
+  skipped: SkippedSpool[];
   errors: string[];
 }
 
+export interface UnlinkedSpool {
+  id: number;
+  filament_name: string | null;
+  filament_material: string | null;
+  filament_color_hex: string | null;
+  remaining_weight: number | null;
+  location: string | null;
+}
+
 // Update types
 export interface VersionInfo {
   version: string;
@@ -2037,6 +2055,13 @@ export const api = {
     request<{ spools: unknown[] }>('/spoolman/spools'),
   getSpoolmanFilaments: () =>
     request<{ filaments: unknown[] }>('/spoolman/filaments'),
+  getUnlinkedSpools: () =>
+    request<UnlinkedSpool[]>('/spoolman/spools/unlinked'),
+  linkSpool: (spoolId: number, trayUuid: string) =>
+    request<{ success: boolean; message: string }>(`/spoolman/spools/${spoolId}/link`, {
+      method: 'POST',
+      body: JSON.stringify({ tray_uuid: trayUuid }),
+    }),
 
   // Updates
   getVersion: () => request<VersionInfo>('/updates/version'),