feat(fetch-requests): navigate to detail page after successful create

- Detail page: red Delete button beside Retry (disabled while processing or
  in-flight), confirm dialog, toast feedback, navigates back to the list
- List rows: per-card delete IconButton with stopPropagation, disabled while
  processing; reloads after success
- Backend cascades linked expenses + ambiguities and evicts the expenses
  response cache on delete

src/FetchRequest/components/PipelineStepper.tsx

@@ -31,7 +31,8 @@ function computeProgressPercent(
 
   if (
     seenSteps.has("raw_lines") ||
-    seenSteps.has("txn_blocks")
+    seenSteps.has("txn_blocks") ||
+    seenSteps.has("llama_extract")
   ) {
     pct += 10;
   }

src/features/fetch-requests/fetch-requests.models.ts

@@ -90,7 +90,7 @@ export interface ResolveAmbiguityPayload {
 export type SSEEventStep =
   | "load_content" | "raw_lines" | "txn_blocks" | "txn_dicts"
   | "resume_extract" | "extract" | "paused" | "complete" | "enrich"
-  | "save_expenses" | "pipeline";
+  | "save_expenses" | "pipeline" | "llama_extract";
 
 export type SSEEventStatus =
   | "started" | "completed" | "skipped" | "paused" | "progress" | "failed";