fix(ui): unify list filters across all pages (bare controls, standard sizes)

Every list-page FilterBar now follows one spec: bare controls (no Field label rows — which broke flex-end alignment), standardized widths (search 1 1 320px grows; small selects 0 0 160px; entity selects 0 0 220px; MonthField 0 0 180px; dates 0 0 150px), consistent 'Všechny/Všichni/Všechna <entity>' defaults, and a placeholder on every search. TripsAdmin's separate month-Select + year-Select collapse into one MonthField (yyyy-MM, split at the query boundary) — matching Attendance/TripsHistory. The 4 labeled attendance/trips pages move off the Field wrapper; Projects & ReceivedInvoices move their inline search into a FilterBar. Chrome-verified all ~18 filter pages in light + the existing theme.

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

src/admin/pages/WarehouseReports.tsx

@@ -323,7 +323,7 @@ function ProjectConsumptionTab({
     <Box>
       <FilterBar>
         {projects.length > 0 && (
-          <Box sx={{ flex: "0 0 280px" }}>
+          <Box sx={{ flex: "0 0 220px" }}>
             <Select
               value={projectId === "" ? "" : String(projectId)}
               onChange={(val) => setProjectId(val === "" ? "" : Number(val))}