Add job application tracker (admin-only)

Full CRUD GraphQL API for tracking job applications with status workflow.
Frontend component in CV view, hidden from print. Login now redirects to
intended route after auth via query param.

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

backend/graph/job_application.resolvers.go

@@ -0,0 +1,22 @@
+package graph
+
+// This file will be automatically regenerated based on the schema, any resolver
+// implementations
+// will be copied through when generating and any unknown code will be moved to the end.
+// Code generated by github.com/99designs/gqlgen version v0.17.88
+
+import (
+	"context"
+
+	"adam-french.co.uk/backend/models"
+)
+
+// ID is the resolver for the id field.
+func (r *jobApplicationResolver) ID(ctx context.Context, obj *models.JobApplication) (int, error) {
+	return int(obj.ID), nil
+}
+
+// JobApplication returns JobApplicationResolver implementation.
+func (r *Resolver) JobApplication() JobApplicationResolver { return &jobApplicationResolver{r} }
+
+type jobApplicationResolver struct{ *Resolver }