fix(epg): add retry functionality for failed EPG fetches and enhance UI for error handling

Entire-Checkpoint: c6e522b4276c

libs/epg/data-access/src/lib/epg-progress.service.ts

@@ -44,6 +44,13 @@ export class EpgProgressService {
         this.importsMap.set(new Map());
     }
 
+    retry(url: string): void {
+        // Clear the errored row so the backend's subsequent 'queued' event
+        // reappears cleanly rather than updating an existing error row.
+        this.removeImport(url);
+        void window.electron?.forceFetchEpg?.(url);
+    }
+
     private initializeListener(): void {
         if (this.initialized) {
             return;

libs/ui/epg/src/lib/epg-progress-panel/epg-progress-panel.component.html

@@ -59,6 +59,17 @@
                             <span class="item-url" [title]="item.url">
                                 {{ getDisplayUrl(item.url) }}
                             </span>
+                            @if (item.status === 'error') {
+                                <button
+                                    mat-icon-button
+                                    class="retry-btn"
+                                    (click)="retry(item.url)"
+                                    [attr.aria-label]="'EPG.RETRY' | translate"
+                                    [matTooltip]="'EPG.RETRY' | translate"
+                                >
+                                    <mat-icon>refresh</mat-icon>
+                                </button>
+                            }
                             <button
                                 mat-icon-button
                                 class="dismiss-btn"

libs/ui/epg/src/lib/epg-progress-panel/epg-progress-panel.component.scss

@@ -28,7 +28,11 @@
     max-width: calc(100vw - 96px);
     background: var(--epg-panel-bg);
     border-radius: 12px;
-    box-shadow: var(--epg-shadow);
+    border: 1px solid var(--epg-separator);
+    box-shadow:
+        0 1px 2px rgba(0, 0, 0, 0.08),
+        0 8px 24px rgba(0, 0, 0, 0.18),
+        0 16px 48px rgba(0, 0, 0, 0.12);
     z-index: 900;
     overflow: hidden;
     animation: slideInFromLeft 0.3s cubic-bezier(0.16, 1, 0.3, 1);
@@ -154,14 +158,17 @@
             color: var(--epg-text-secondary);
         }
 
-        .dismiss-btn {
+        .dismiss-btn,
+        .retry-btn {
             width: 24px;
             height: 24px;
             padding: 0;
             line-height: 24px;
             border-radius: 6px;
             opacity: 0;
-            transition: opacity 0.15s ease;
+            transition:
+                opacity 0.15s ease,
+                color 0.15s ease;
             color: var(--epg-text-tertiary);
 
             mat-icon {
@@ -170,6 +177,21 @@
                 height: 16px;
             }
         }
+
+        // Retry is a deliberate action — keep it discoverable, not hover-only,
+        // and use the accent color so it reads as primary.
+        .retry-btn {
+            opacity: 1;
+            color: var(--epg-accent);
+
+            &:hover {
+                color: color-mix(
+                    in srgb,
+                    var(--epg-accent) 80%,
+                    var(--epg-text-primary)
+                );
+            }
+        }
     }
 
     &:hover .dismiss-btn {
@@ -234,6 +256,14 @@
     margin: 2px 0 0;
     padding: 6px 10px 8px;
     border-top: 1px solid var(--epg-separator);
+
+    // When queue is the only content (no active imports above),
+    // the panel-header border-bottom already provides separation —
+    // suppress this border to avoid a visible double rule.
+    &:first-child {
+        margin-top: 0;
+        border-top: none;
+    }
 }
 
 .queue-header {

libs/ui/epg/src/lib/epg-progress-panel/epg-progress-panel.component.ts

@@ -84,4 +84,8 @@ export class EpgProgressPanelComponent {
     dismissAll(): void {
         this.epgProgress.dismissAll();
     }
+
+    retry(url: string): void {
+        this.epgProgress.retry(url);
+    }
 }