Remove dynamic form builder and complete RoundProject→roundId migration

Major cleanup and schema migration:
- Remove unused dynamic form builder system (ApplicationForm, ApplicationFormField, etc.)
- Complete migration from RoundProject junction table to direct Project.roundId
- Add sortOrder and entryNotificationType fields to Round model
- Add country field to User model for mentor matching
- Enhance onboarding with profile photo and country selection steps
- Fix all TypeScript errors related to roundProjects references
- Remove unused libraries (@radix-ui/react-toast, embla-carousel-react, vaul)

Files removed:
- admin/forms/* pages and related components
- admin/onboarding/* pages
- applicationForm.ts and onboarding.ts routers
- Dynamic form builder Prisma models and enums

Schema changes:
- Removed ApplicationForm, ApplicationFormField, OnboardingStep, ApplicationFormSubmission, SubmissionFile models
- Removed FormFieldType and SpecialFieldType enums
- Added Round.sortOrder, Round.entryNotificationType
- Added User.country

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/server/routers/applicant.ts

@@ -62,7 +62,7 @@ export const applicantRouter = router({
 
       const project = await ctx.prisma.project.findFirst({
         where: {
-          roundProjects: { some: { roundId: input.roundId } },
+          roundId: input.roundId,
           OR: [
             { submittedByUserId: ctx.user.id },
             {
@@ -74,14 +74,9 @@ export const applicantRouter = router({
         },
         include: {
           files: true,
-          roundProjects: {
-            where: { roundId: input.roundId },
+          round: {
             include: {
-              round: {
-                include: {
-                  program: { select: { name: true, year: true } },
-                },
-              },
+              program: { select: { name: true, year: true } },
             },
           },
           teamMembers: {
@@ -179,10 +174,10 @@ export const applicantRouter = router({
           },
         })
 
-        // Update RoundProject status if submitting
+        // Update Project status if submitting
         if (submit) {
-          await ctx.prisma.roundProject.updateMany({
-            where: { projectId: projectId },
+          await ctx.prisma.project.update({
+            where: { id: projectId },
             data: { status: 'SUBMITTED' },
           })
         }
@@ -198,21 +193,13 @@ export const applicantRouter = router({
         // Create new project
         const project = await ctx.prisma.project.create({
           data: {
-            programId: roundForCreate.programId,
+            roundId,
             ...data,
             metadataJson: metadataJson as unknown ?? undefined,
             submittedByUserId: ctx.user.id,
             submittedByEmail: ctx.user.email,
             submissionSource: 'MANUAL',
             submittedAt: submit ? now : null,
-          },
-        })
-
-        // Create RoundProject entry
-        await ctx.prisma.roundProject.create({
-          data: {
-            roundId,
-            projectId: project.id,
             status: 'SUBMITTED',
           },
         })
@@ -412,15 +399,10 @@ export const applicantRouter = router({
           ],
         },
         include: {
-          roundProjects: {
+          round: {
             include: {
-              round: {
-                include: {
-                  program: { select: { name: true, year: true } },
-                },
-              },
+              program: { select: { name: true, year: true } },
             },
-            orderBy: { addedAt: 'desc' },
           },
           files: true,
           teamMembers: {
@@ -440,9 +422,8 @@ export const applicantRouter = router({
         })
       }
 
-      // Get the latest round project status
-      const latestRoundProject = project.roundProjects[0]
-      const currentStatus = latestRoundProject?.status ?? 'SUBMITTED'
+      // Get the project status
+      const currentStatus = project.status ?? 'SUBMITTED'
 
       // Build timeline
       const timeline = [
@@ -509,15 +490,10 @@ export const applicantRouter = router({
         ],
       },
       include: {
-        roundProjects: {
+        round: {
           include: {
-            round: {
-              include: {
-                program: { select: { name: true, year: true } },
-              },
-            },
+            program: { select: { name: true, year: true } },
           },
-          orderBy: { addedAt: 'desc' },
         },
         files: true,
         teamMembers: {