fix: harden award track filtering edge cases in applicant portal

- getNavFlags/getMyEvaluations: return empty when project has no round
  states instead of dropping the filter (prevented phantom eval rounds)
- getUpcomingDeadlines: detect isInAwardTrack from ProjectRoundState
  join instead of pre-filtered deadline rounds

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

src/server/routers/applicant.ts

@@ -1431,15 +1431,17 @@ export const applicantRouter = router({
         })).map((prs) => prs.roundId)
       )
 
-      const closedEvalRounds = await ctx.prisma.round.findMany({
+      const closedEvalRounds = projectRoundIds.size > 0
+        ? await ctx.prisma.round.findMany({
             where: {
               competition: { programId: project.programId },
               roundType: 'EVALUATION',
               status: { in: ['ROUND_CLOSED', 'ROUND_ARCHIVED'] },
-          ...(projectRoundIds.size > 0 ? { id: { in: [...projectRoundIds] } } : {}),
+              id: { in: [...projectRoundIds] },
             },
             select: { configJson: true },
           })
+        : []
       hasEvaluationRounds = closedEvalRounds.some((r) => {
         const parsed = EvaluationConfigSchema.safeParse(r.configJson)
         return parsed.success && parsed.data.applicantVisibility.enabled
@@ -1713,12 +1715,14 @@ export const applicantRouter = router({
       })).map((prs) => prs.roundId)
     )
 
+    if (projectRoundIds.size === 0) return []
+
     const evalRounds = await ctx.prisma.round.findMany({
       where: {
         competition: { programId: project.programId },
         roundType: 'EVALUATION',
         status: { in: ['ROUND_CLOSED', 'ROUND_ARCHIVED'] },
-        ...(projectRoundIds.size > 0 ? { id: { in: [...projectRoundIds] } } : {}),
+        id: { in: [...projectRoundIds] },
       },
       select: {
         id: true,
@@ -1828,15 +1832,12 @@ export const applicantRouter = router({
     })
 
     // Filter by award track membership
-    const projectRoundIds = new Set(
-      (await ctx.prisma.projectRoundState.findMany({
+    const projectStates = await ctx.prisma.projectRoundState.findMany({
       where: { projectId: project.id },
-        select: { roundId: true },
-      })).map((prs) => prs.roundId)
-    )
-    const isInAwardTrack = rounds.some(
-      (r) => r.specialAwardId && projectRoundIds.has(r.id)
-    )
+      select: { roundId: true, round: { select: { specialAwardId: true } } },
+    })
+    const projectRoundIds = new Set(projectStates.map((prs) => prs.roundId))
+    const isInAwardTrack = projectStates.some((prs) => prs.round.specialAwardId)
 
     return rounds
       .filter((r) => {