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/components/projects/BudgetStatusCard.tsx

@@ -1,6 +1,7 @@
 "use client";
 
 import { clsx } from "clsx";
+import { formatMoney } from "~/lib/format.js";
 import { trpc } from "~/lib/trpc/client.js";
 import { BudgetStatusBar } from "./BudgetStatusBar.js";
 
@@ -8,14 +9,7 @@ interface BudgetStatusCardProps {
   projectId: string;
 }
 
-function formatEur(cents: number): string {
-  return (cents / 100).toLocaleString("de-DE", {
-    style: "currency",
-    currency: "EUR",
-    minimumFractionDigits: 2,
-    maximumFractionDigits: 2,
-  });
-}
+const formatEur = (cents: number) => formatMoney(cents, "EUR", 2);
 
 function WarningIcon({ level }: { level: string }) {
   if (level === "critical") {