feat: project colors, timeline filters, sidebar fix, GitLooper agent, and misc improvements

- Fix sidebar double-highlight on /vacations/my (Gitea #6): add isNavItemActive() helper
- Add project color picker (schema + API + modal + timeline rendering)
- Add ProjectCombobox/ResourceCombobox to timeline toolbar
- Show PENDING vacations on timeline with dashed/dimmed style
- Add "show demand projects" preference with localStorage persistence
- Add ProjectAssignmentsTable with total hours/cost columns
- Extend vacation API to accept status arrays
- Add GitLooper formal YAML agent configuration
- Extend user admin with permission overrides UI
- Add delete-assignment use case tests
- Add status-styles.ts shared badge constants
- Centralize formatMoney/formatCents in format.ts

Co-Authored-By: claude-flow <ruv@ruv.net>

apps/web/src/lib/format.ts

@@ -30,11 +30,24 @@ export function formatDateLong(d: Date | string): string {
 
 /**
  * Format integer cents as a currency string (e.g. "1.234 €").
- * Defaults to EUR with no decimal places.
+ * Defaults to EUR with no decimal places. Pass `fractionDigits: 2` for precise display.
  */
-export function formatMoney(cents: number | null | undefined, currency = "EUR"): string {
+export function formatMoney(cents: number | null | undefined, currency = "EUR", fractionDigits = 0): string {
   const value = (cents ?? 0) / 100;
-  return new Intl.NumberFormat("de-DE", { style: "currency", currency, maximumFractionDigits: 0 }).format(value);
+  return new Intl.NumberFormat("de-DE", {
+    style: "currency",
+    currency,
+    minimumFractionDigits: fractionDigits,
+    maximumFractionDigits: fractionDigits,
+  }).format(value);
+}
+
+/**
+ * Format a date as "16 Mar 2026" for compact display with year.
+ */
+export function formatDateMedium(d: Date | string | null | undefined): string {
+  if (!d) return "";
+  return new Date(d).toLocaleDateString("en-GB", { year: "numeric", month: "short", day: "numeric" });
 }
 
 /**