feat: fix project status counts, add top pagination and sortable columns

- Status counts now show each project's latest round state only
  (no more inflated counts from projects passing multiple rounds)
- Add pagination controls at top of projects, members, and observer lists
- Add sortable column headers to admin projects table (title, category,
  program, assignments, status) and members table (name, role, status,
  last login)
- Backend: add sortBy/sortDir params to project.list and user.list

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/app/(admin)/admin/projects/page.tsx

@@ -94,6 +94,7 @@ import { ProjectLogo } from '@/components/shared/project-logo'
 import { BulkNotificationDialog } from '@/components/admin/projects/bulk-notification-dialog'
 
 import { Pagination } from '@/components/shared/pagination'
+import { SortableHeader } from '@/components/shared/sortable-header'
 import { getCountryName, getCountryFlag, normalizeCountryToCode } from '@/lib/countries'
 import { CountryFlagImg } from '@/components/ui/country-select'
 import {
@@ -215,6 +216,8 @@ export default function ProjectsPage() {
   const [perPage, setPerPage] = useState(parsed.perPage || 20)
   const [searchInput, setSearchInput] = useState(parsed.search)
   const [viewMode, setViewMode] = useState<'table' | 'card'>('table')
+  const [sortBy, setSortBy] = useState<string | undefined>(undefined)
+  const [sortDir, setSortDir] = useState<'asc' | 'desc'>('desc')
 
   // Fetch display settings
   const { data: displaySettings } = trpc.settings.getMultiple.useQuery({
@@ -260,6 +263,16 @@ export default function ProjectsPage() {
     setPage(1)
   }
 
+  const handleSort = (column: string) => {
+    if (sortBy === column) {
+      setSortDir((d) => (d === 'asc' ? 'desc' : 'asc'))
+    } else {
+      setSortBy(column)
+      setSortDir('asc')
+    }
+    setPage(1)
+  }
+
   // Build tRPC query input
   const queryInput = {
     search: filters.search || undefined,
@@ -298,6 +311,8 @@ export default function ProjectsPage() {
     hasAssignments: filters.hasAssignments,
     page,
     perPage,
+    sortBy: sortBy as 'title' | 'category' | 'program' | 'assignments' | 'status' | 'createdAt' | undefined,
+    sortDir: sortBy ? sortDir : undefined,
   }
 
   const utils = trpc.useUtils()
@@ -876,6 +891,17 @@ export default function ProjectsPage() {
         </Card>
       ) : data ? (
         <>
+          {/* Top Pagination */}
+          {data.totalPages > 1 && (
+            <Pagination
+              page={data.page}
+              totalPages={data.totalPages}
+              total={data.total}
+              perPage={perPage}
+              onPageChange={setPage}
+            />
+          )}
+
           {/* Table View */}
           {viewMode === 'table' ? (
             <>
@@ -891,12 +917,12 @@ export default function ProjectsPage() {
                           aria-label="Select all projects"
                         />
                       </TableHead>
-                      <TableHead className="min-w-[280px]">Project</TableHead>
+                      <SortableHeader label="Project" column="title" currentSort={sortBy} currentDir={sortDir} onSort={handleSort} className="min-w-[280px]" />
-                      <TableHead>Category</TableHead>
+                      <SortableHeader label="Category" column="category" currentSort={sortBy} currentDir={sortDir} onSort={handleSort} />
-                      <TableHead>Program</TableHead>
+                      <SortableHeader label="Program" column="program" currentSort={sortBy} currentDir={sortDir} onSort={handleSort} />
                       <TableHead>Tags</TableHead>
-                      <TableHead>Assignments</TableHead>
+                      <SortableHeader label="Assignments" column="assignments" currentSort={sortBy} currentDir={sortDir} onSort={handleSort} />
-                      <TableHead>Status</TableHead>
+                      <SortableHeader label="Status" column="status" currentSort={sortBy} currentDir={sortDir} onSort={handleSort} />
                       <TableHead className="text-right">Actions</TableHead>
                     </TableRow>
                   </TableHeader>

src/components/admin/members-content.tsx

@@ -28,6 +28,7 @@ import { Skeleton } from '@/components/ui/skeleton'
 import { UserAvatar } from '@/components/shared/user-avatar'
 import { UserActions, UserMobileActions } from '@/components/admin/user-actions'
 import { Pagination } from '@/components/shared/pagination'
+import { SortableHeader } from '@/components/shared/sortable-header'
 import { Plus, Users, Search, Mail, Loader2, X, Send } from 'lucide-react'
 import { toast } from 'sonner'
 import { formatRelativeTime } from '@/lib/utils'
@@ -138,6 +139,18 @@ export function MembersContent() {
   const roles = TAB_ROLES[tab]
 
   const [selectedIds, setSelectedIds] = useState<Set<string>>(new Set())
+  const [sortBy, setSortBy] = useState<string | undefined>(undefined)
+  const [sortDir, setSortDir] = useState<'asc' | 'desc'>('asc')
+
+  const handleSort = (column: string) => {
+    if (sortBy === column) {
+      setSortDir((d) => (d === 'asc' ? 'desc' : 'asc'))
+    } else {
+      setSortBy(column)
+      setSortDir('asc')
+    }
+    updateParams({ page: '1' })
+  }
 
   const { data: currentUser } = trpc.user.me.useQuery()
   const currentUserRole = currentUser?.role as RoleValue | undefined
@@ -147,6 +160,8 @@ export function MembersContent() {
     search: search || undefined,
     page,
     perPage: 20,
+    sortBy: sortBy as 'name' | 'email' | 'role' | 'status' | 'lastLoginAt' | 'createdAt' | undefined,
+    sortDir: sortBy ? sortDir : undefined,
   })
 
   const invitableIdsQuery = trpc.user.listInvitableIds.useQuery(
@@ -290,6 +305,17 @@ export function MembersContent() {
         <MembersSkeleton />
       ) : data && data.users.length > 0 ? (
         <>
+          {/* Top Pagination */}
+          {data.totalPages > 1 && (
+            <Pagination
+              page={page}
+              totalPages={data.totalPages}
+              total={data.total}
+              perPage={data.perPage}
+              onPageChange={(newPage) => updateParams({ page: String(newPage) })}
+            />
+          )}
+
           {/* Bulk selection controls */}
           <Card>
             <CardContent className="py-3 flex flex-wrap items-center justify-between gap-2">
@@ -334,12 +360,12 @@ export function MembersContent() {
                       />
                     )}
                   </TableHead>
-                  <TableHead>Member</TableHead>
+                  <SortableHeader label="Member" column="name" currentSort={sortBy} currentDir={sortDir} onSort={handleSort} />
-                  <TableHead>Role</TableHead>
+                  <SortableHeader label="Role" column="role" currentSort={sortBy} currentDir={sortDir} onSort={handleSort} />
                   <TableHead>Expertise</TableHead>
                   <TableHead>Assignments</TableHead>
-                  <TableHead>Status</TableHead>
+                  <SortableHeader label="Status" column="status" currentSort={sortBy} currentDir={sortDir} onSort={handleSort} />
-                  <TableHead>Last Login</TableHead>
+                  <SortableHeader label="Last Login" column="lastLoginAt" currentSort={sortBy} currentDir={sortDir} onSort={handleSort} />
                   <TableHead className="text-right">Actions</TableHead>
                 </TableRow>
               </TableHeader>
@@ -681,6 +707,17 @@ function ApplicantsTabContent({ search, searchInput, setSearchInput }: { search:
 
   return (
     <>
+      {/* Top Pagination */}
+      {data.totalPages > 1 && (
+        <Pagination
+          page={page}
+          totalPages={data.totalPages}
+          total={data.total}
+          perPage={data.perPage}
+          onPageChange={setPage}
+        />
+      )}
+
       {/* Desktop table */}
       <Card className="hidden md:block">
         <Table>

src/components/observer/observer-projects-content.tsx

@@ -274,6 +274,36 @@ export function ObserverProjectsContent() {
         </Card>
       ) : projectsData && projectsData.projects.length > 0 ? (
         <>
+          {/* Top Pagination */}
+          {projectsData.totalPages > 1 && (
+            <div className="flex items-center justify-between">
+              <p className="text-sm text-muted-foreground">
+                Page {projectsData.page} of {projectsData.totalPages} &middot;{' '}
+                {projectsData.total} result{projectsData.total !== 1 ? 's' : ''}
+              </p>
+              <div className="flex items-center gap-2">
+                <Button
+                  variant="outline"
+                  size="sm"
+                  onClick={() => setPage((p) => Math.max(1, p - 1))}
+                  disabled={page <= 1}
+                >
+                  <ChevronLeft className="h-4 w-4" />
+                </Button>
+                <Button
+                  variant="outline"
+                  size="sm"
+                  onClick={() =>
+                    setPage((p) => Math.min(projectsData.totalPages, p + 1))
+                  }
+                  disabled={page >= projectsData.totalPages}
+                >
+                  <ChevronRight className="h-4 w-4" />
+                </Button>
+              </div>
+            </div>
+          )}
+
           <div className="hidden md:block">
             <Card>
               <CardContent className="p-0">

src/components/shared/sortable-header.tsx

@@ -0,0 +1,45 @@
+'use client'
+
+import { TableHead } from '@/components/ui/table'
+import { cn } from '@/lib/utils'
+import { ArrowUpDown, ArrowUp, ArrowDown } from 'lucide-react'
+
+type SortableHeaderProps = {
+  label: string
+  column: string
+  currentSort?: string
+  currentDir?: 'asc' | 'desc'
+  onSort: (column: string) => void
+  className?: string
+}
+
+export function SortableHeader({
+  label,
+  column,
+  currentSort,
+  currentDir,
+  onSort,
+  className,
+}: SortableHeaderProps) {
+  const isActive = currentSort === column
+
+  return (
+    <TableHead
+      className={cn('cursor-pointer select-none hover:bg-muted/50 transition-colors', className)}
+      onClick={() => onSort(column)}
+    >
+      <div className="flex items-center gap-1">
+        {label}
+        {isActive ? (
+          currentDir === 'asc' ? (
+            <ArrowUp className="h-3.5 w-3.5 text-foreground" />
+          ) : (
+            <ArrowDown className="h-3.5 w-3.5 text-foreground" />
+          )
+        ) : (
+          <ArrowUpDown className="h-3.5 w-3.5 text-muted-foreground/50" />
+        )}
+      </div>
+    </TableHead>
+  )
+}

src/server/routers/project.ts

@@ -76,6 +76,8 @@ export const projectRouter = router({
         hasAssignments: z.boolean().optional(),
         page: z.number().int().min(1).default(1),
         perPage: z.number().int().min(1).max(200).default(20),
+        sortBy: z.enum(['title', 'category', 'program', 'assignments', 'status', 'createdAt']).optional(),
+        sortDir: z.enum(['asc', 'desc']).optional(),
       })
     )
     .query(async ({ ctx, input }) => {
@@ -83,10 +85,23 @@ export const projectRouter = router({
         programId, roundId, excludeInRoundId, status, statuses, unassignedOnly, search, tags,
         competitionCategory, oceanIssue, country,
         wantsMentorship, hasFiles, hasAssignments,
-        page, perPage,
+        page, perPage, sortBy, sortDir,
       } = input
       const skip = (page - 1) * perPage
 
+      const dir = sortDir ?? 'desc'
+      const orderBy: Prisma.ProjectOrderByWithRelationInput = (() => {
+        switch (sortBy) {
+          case 'title':       return { title: dir }
+          case 'category':    return { competitionCategory: dir }
+          case 'program':     return { program: { name: dir } }
+          case 'assignments': return { assignments: { _count: dir } }
+          case 'status':      return { status: dir }
+          case 'createdAt':
+          default:            return { createdAt: dir }
+        }
+      })()
+
       // Build where clause
       const where: Record<string, unknown> = {}
 
@@ -151,7 +166,7 @@ export const projectRouter = router({
           where,
           skip,
           take: perPage,
-          orderBy: { createdAt: 'desc' },
+          orderBy,
           include: {
             program: { select: { id: true, name: true, year: true } },
             _count: { select: { assignments: true, files: true } },

src/server/routers/user.ts

@@ -238,10 +238,12 @@ export const userRouter = router({
         search: z.string().optional(),
         page: z.number().int().min(1).default(1),
         perPage: z.number().int().min(1).max(100).default(20),
+        sortBy: z.enum(['name', 'email', 'role', 'status', 'lastLoginAt', 'createdAt']).optional(),
+        sortDir: z.enum(['asc', 'desc']).optional(),
       })
     )
     .query(async ({ ctx, input }) => {
-      const { role, roles, status, search, page, perPage } = input
+      const { role, roles, status, search, page, perPage, sortBy, sortDir } = input
       const skip = (page - 1) * perPage
 
       const where: Record<string, unknown> = {}
@@ -259,12 +261,17 @@ export const userRouter = router({
         ]
       }
 
+      const dir = sortDir ?? 'asc'
+      const orderBy: Record<string, string> = sortBy
+        ? { [sortBy]: dir }
+        : { createdAt: 'desc' }
+
       const [users, total] = await Promise.all([
         ctx.prisma.user.findMany({
           where,
           skip,
           take: perPage,
-          orderBy: { createdAt: 'desc' },
+          orderBy,
           select: {
             id: true,
             email: true,