feat(reports): parseOperationalFilters pure parser (Area scope)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/lib/services/reports/operational-filters.ts

@@ -0,0 +1,27 @@
+/**
+ * Operational report filters. Mirrors `sales-filters.ts`: the parser is a
+ * pure, unit-testable function so the route just hands it the query params.
+ *
+ * Beta scope is Area only (a berth-area scope). The shape is intentionally
+ * an object so a Status dimension can be added later without a rename.
+ */
+export interface OperationalFilters {
+  areas?: string[];
+}
+
+/**
+ * Parse the `area` CSV query param into a free list of port-defined area
+ * strings. Empty / whitespace entries are dropped. Drizzle parameterises
+ * the downstream `inArray`, so unvalidated values are injection-safe.
+ * Returns `undefined` when no areas are active (→ no filter).
+ */
+export function parseOperationalFilters(params: URLSearchParams): OperationalFilters | undefined {
+  const raw = params.get('area');
+  if (!raw) return undefined;
+  const areas = raw
+    .split(',')
+    .map((s) => s.trim())
+    .filter((s) => s.length > 0);
+  if (areas.length === 0) return undefined;
+  return { areas };
+}