Fix: anchor lib/ ignore patterns to repo root, add web/src/lib/utils.ts

The catch-all `lib/` pattern in both .gitignore and .dockerignore (intended
to exclude Python venv lib dirs) silently swallowed `web/src/lib/utils.ts`.
That's why every Docker build got "ENOENT /web/src/lib/utils" — the file
was never committed and never copied into the container, but local builds
worked because the file existed on disk.

Anchor `lib/` and `lib64/` to the repo root with `/lib/` and `/lib64/`,
then add the previously-ignored utils.ts.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.dockerignore

@@ -15,8 +15,8 @@ dist/
 downloads/
 eggs/
 .eggs/
-lib/
+/lib/
-lib64/
+/lib64/
 parts/
 sdist/
 var/

.gitignore

@@ -154,8 +154,8 @@ dist/
 downloads/
 eggs/
 .eggs/
-lib/
+/lib/
-lib64/
+/lib64/
 parts/
 sdist/
 var/

web/src/lib/utils.ts

@@ -0,0 +1,33 @@
+import { type ClassValue, clsx } from "clsx";
+import { twMerge } from "tailwind-merge";
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs));
+}
+
+export function formatCurrencyILS(amount: number | null | undefined): string {
+  if (amount == null || isNaN(amount)) return "—";
+  return new Intl.NumberFormat("he-IL", {
+    style: "currency",
+    currency: "ILS",
+    maximumFractionDigits: 0,
+  }).format(amount);
+}
+
+export function formatDate(iso: string | null | undefined): string {
+  if (!iso) return "—";
+  try {
+    return new Date(iso).toLocaleDateString("he-IL", {
+      year: "numeric",
+      month: "2-digit",
+      day: "2-digit",
+    });
+  } catch {
+    return iso;
+  }
+}
+
+export function formatNumber(n: number | null | undefined): string {
+  if (n == null || isNaN(n)) return "—";
+  return new Intl.NumberFormat("he-IL").format(n);
+}