feat: clickable status badges, observer status alignment, CSV export all

- Admin projects: status summary badges are clickable to filter by round state
  with ring highlight, opacity fade, and clear button
- Add roundStates filter param to project.list backend query
  (filters by latest round state per project, consistent with counts)
- Observer status dropdown now uses ProjectRoundState values
  (Pending/In Progress/Completed/Passed/Rejected/Withdrawn)
- Observer status derived from latest ProjectRoundState instead of stale Project.status
- Observer CSV export fetches all matching projects, not just current page
- Add PENDING and PASSED styles to StatusBadge component

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

src/server/routers/project.ts

@@ -74,6 +74,9 @@ export const projectRouter = router({
         wantsMentorship: z.boolean().optional(),
         hasFiles: z.boolean().optional(),
         hasAssignments: z.boolean().optional(),
+        roundStates: z.array(z.enum([
+          'PENDING', 'IN_PROGRESS', 'COMPLETED', 'PASSED', 'REJECTED', 'WITHDRAWN',
+        ])).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(),
@@ -84,7 +87,7 @@ export const projectRouter = router({
       const {
         programId, roundId, excludeInRoundId, status, statuses, unassignedOnly, search, tags,
         competitionCategory, oceanIssue, country,
-        wantsMentorship, hasFiles, hasAssignments,
+        wantsMentorship, hasFiles, hasAssignments, roundStates,
         page, perPage, sortBy, sortDir,
       } = input
       const skip = (page - 1) * perPage
@@ -143,6 +146,27 @@ export const projectRouter = router({
       if (hasAssignments === true) where.assignments = { some: {} }
       if (hasAssignments === false) where.assignments = { none: {} }
 
+      // Filter by latest round state (matches the statusCounts logic)
+      if (roundStates?.length) {
+        const stateFilter: Record<string, unknown> = {}
+        if (programId) stateFilter.project = { programId }
+        const allStates = await ctx.prisma.projectRoundState.findMany({
+          where: stateFilter,
+          select: { projectId: true, state: true, round: { select: { sortOrder: true } } },
+          orderBy: { round: { sortOrder: 'desc' } },
+        })
+        const latestByProject = new Map<string, string>()
+        for (const s of allStates) {
+          if (!latestByProject.has(s.projectId)) {
+            latestByProject.set(s.projectId, s.state)
+          }
+        }
+        const matchingIds = [...latestByProject.entries()]
+          .filter(([, state]) => roundStates.includes(state as typeof roundStates[number]))
+          .map(([id]) => id)
+        where.id = { in: matchingIds }
+      }
+
       if (search) {
         where.OR = [
           { title: { contains: search, mode: 'insensitive' } },