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/timeline/TimelineProjectPanel.tsx

@@ -598,6 +598,7 @@ export function TimelineProjectPanel({
             {row.type === "header" ? (
               (() => {
                 const { project } = row;
+                const customColor = project.color;
                 const colors = ORDER_TYPE_COLORS[project.orderType] ?? {
                   bg: "bg-gray-400",
                   text: "text-white",
@@ -652,14 +653,15 @@ export function TimelineProjectPanel({
                             isThisProjectShifting
                               ? "opacity-90 shadow-lg ring-2 ring-white ring-offset-1 cursor-grabbing z-20 scale-[1.01]"
                               : "cursor-grab hover:opacity-90 hover:ring-2 hover:ring-white hover:ring-offset-1",
-                            colors.bg,
-                            colors.text,
+                            !customColor && colors.bg,
+                            customColor ? "text-white" : colors.text,
                           )}
                           style={{
                             left: projLeft + 2,
                             width: projWidth - 4,
                             top: 8,
                             height: 24,
+                            ...(customColor ? { backgroundColor: customColor } : {}),
                           }}
                           onClick={() => {
                             if (!dragState.isDragging) onOpenPanel(project.id);