Rebuild the schema and API on a working, multi-user foundation

Steps 1-4 of the review plan (docs/plans not checked in; see conversation):

Step 1 - make it boot from a clean checkout:
- Replace the old schema.sql + single ALTER-TABLE migration (which never
  created the tables) with one init migration: users, sessions, platform,
  game, all with UUIDv7-ready uuid ids, soft deletes (deleted_at), and a
  shared change_seq sequence + trigger for a future sync feature.
- sqlc now reads the schema from db/migrations directly.
- Migrations are embedded in the binary (db/migrations/embed.go) instead of
  being copied around and found via path fallbacks.
- ensureDatabase/runMigrations failures are now fatal, and main pings the
  pool after connecting, instead of starting an API with no schema.
- Switched both the app and golang-migrate to pgx/v5 (dropped lib/pq).
- Fixed the Dockerfile's Go version (1.23 -> 1.25) and build target.
- Added a postgres healthcheck to docker-compose so the app waits for a
  ready database instead of racing it.
- go.mod tidied, bin/ added to .gitignore, Justfile's docker-compose calls
  switched to the v2 `docker compose` plugin.

Step 2 - auth and per-user data:
- internal/auth: argon2id password hashing, random session tokens stored
  only as a hash.
- POST /api/auth/{register,login,logout}, GET /api/auth/me. Sessions work
  via either an Authorization: Bearer header or an httpOnly cookie.
- Every platform/game query is scoped to the authenticated user.

Step 3 - API correctness:
- internal/model holds the DTOs, with no server-side dependencies, so
  clients can import it later without pulling in Huma/Echo.
- dbError() maps ErrNoRows -> 404, unique violation -> 409, FK violation ->
  409, instead of leaking Postgres error text with a 500.
- Soft-delete meant the FK on game.platform_id no longer blocks deleting a
  referenced platform on its own; added a NOT EXISTS guard plus an
  application-level check so that case now correctly returns 409 instead of
  silently succeeding (caught by testing the live server, not by a mock).
- Added GET /games/{id} and GET /platforms/{id}. All JSON routes moved
  under /api, freeing / for a future web client.
- ListGames/GetGame join platform_name in.
- cmd/openapi writes the generated spec to api/openapi.json.

Step 4 - tests and CI:
- Rewrote the mocks and handler tests for the new Querier shape; added
  coverage for 401 (no session), 404 (not found / another user's row),
  409 (duplicate email, platform referenced by games), 422 (score out of
  range), and that queries are actually scoped by the authenticated user's
  id, not just that the right status code comes back.
- .github/workflows/ci.yml: go vet, go test, go mod tidy -diff, sqlc diff.

Everything above was exercised against a real local Postgres (migrations
up/down, the trigger, constraints) and through the running server via curl
(register, login, scoping, every status-code case), not just unit tests.

Known regression, intentionally deferred to the next step: cmd/tui and
cmd/gui still call the old unauthenticated GET /games, which no longer
exists. They need internal/client and a login flow before they work again.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

internal/api/auth_routes.go

@@ -0,0 +1,160 @@
+package api
+
+import (
+	"context"
+	"net/http"
+	"time"
+
+	"github.com/danielgtaylor/huma/v2"
+	"github.com/google/uuid"
+	"github.com/jackc/pgx/v5/pgtype"
+
+	"completed/internal/auth"
+	"completed/internal/db"
+	"completed/internal/model"
+)
+
+type authOutput struct {
+	SetCookie string `header:"Set-Cookie"`
+	Body      model.AuthResponse
+}
+
+// sessionCookie builds the Set-Cookie value for a successful login. Secure
+// is left unset because the app is also meant to run over plain HTTP in
+// local/docker-compose use; put a TLS-terminating proxy in front for
+// anything reachable over the network and set Secure there instead.
+func sessionCookie(token string) string {
+	c := http.Cookie{
+		Name:     sessionCookieName,
+		Value:    token,
+		Path:     "/",
+		HttpOnly: true,
+		SameSite: http.SameSiteLaxMode,
+		MaxAge:   auth.SessionDuration,
+	}
+	return c.String()
+}
+
+func clearedSessionCookie() string {
+	c := http.Cookie{
+		Name:     sessionCookieName,
+		Value:    "",
+		Path:     "/",
+		HttpOnly: true,
+		SameSite: http.SameSiteLaxMode,
+		MaxAge:   -1,
+	}
+	return c.String()
+}
+
+// newSession creates and stores a session for userID, returning the token
+// to hand back to the client (only its hash is ever persisted).
+func newSession(ctx context.Context, queries db.Querier, userID uuid.UUID) (string, error) {
+	token, tokenHash, err := auth.NewSessionToken()
+	if err != nil {
+		return "", err
+	}
+	err = queries.CreateSession(ctx, db.CreateSessionParams{
+		TokenHash: tokenHash,
+		UserID:    userID,
+		ExpiresAt: pgtype.Timestamptz{Time: time.Now().Add(auth.SessionDuration * time.Second), Valid: true},
+	})
+	return token, err
+}
+
+func registerAuthRoutes(api huma.API, queries db.Querier) {
+	huma.Register(api, huma.Operation{
+		OperationID: "register",
+		Method:      http.MethodPost,
+		Path:        "/api/auth/register",
+		Summary:     "Register a new account",
+	}, func(ctx context.Context, input *struct{ Body model.RegisterInput }) (*authOutput, error) {
+		hash, err := auth.HashPassword(input.Body.Password)
+		if err != nil {
+			return nil, huma.Error500InternalServerError("could not process password")
+		}
+
+		u, err := queries.CreateUser(ctx, db.CreateUserParams{
+			Email:        input.Body.Email,
+			PasswordHash: hash,
+			Name:         input.Body.Name,
+			Bio:          pgtype.Text{},
+		})
+		if err != nil {
+			return nil, dbError(err)
+		}
+
+		token, err := newSession(ctx, queries, u.ID)
+		if err != nil {
+			return nil, huma.Error500InternalServerError("could not create session")
+		}
+
+		return &authOutput{
+			SetCookie: sessionCookie(token),
+			Body: model.AuthResponse{
+				Token: token,
+				User:  model.User{ID: u.ID.String(), Email: u.Email, Name: u.Name},
+			},
+		}, nil
+	})
+
+	huma.Register(api, huma.Operation{
+		OperationID: "login",
+		Method:      http.MethodPost,
+		Path:        "/api/auth/login",
+		Summary:     "Log in to an existing account",
+	}, func(ctx context.Context, input *struct{ Body model.LoginInput }) (*authOutput, error) {
+		u, err := queries.GetUserByEmail(ctx, input.Body.Email)
+		if err != nil {
+			// Same message whether the email is unknown or the password is
+			// wrong, so a client can't use this endpoint to enumerate
+			// registered emails.
+			return nil, huma.Error401Unauthorized("invalid email or password")
+		}
+
+		ok, err := auth.VerifyPassword(input.Body.Password, u.PasswordHash)
+		if err != nil || !ok {
+			return nil, huma.Error401Unauthorized("invalid email or password")
+		}
+
+		token, err := newSession(ctx, queries, u.ID)
+		if err != nil {
+			return nil, huma.Error500InternalServerError("could not create session")
+		}
+
+		return &authOutput{
+			SetCookie: sessionCookie(token),
+			Body: model.AuthResponse{
+				Token: token,
+				User:  model.User{ID: u.ID.String(), Email: u.Email, Name: u.Name},
+			},
+		}, nil
+	})
+
+	logoutOp := huma.Operation{
+		OperationID: "logout",
+		Method:      http.MethodPost,
+		Path:        "/api/auth/logout",
+		Summary:     "Log out of the current session",
+	}
+	addAuth(&logoutOp, api, queries)
+	huma.Register(api, logoutOp, func(ctx context.Context, input *struct{}) (*struct {
+		SetCookie string `header:"Set-Cookie"`
+	}, error) {
+		_ = queries.DeleteSession(ctx, auth.HashSessionToken(tokenFromContext(ctx)))
+		return &struct {
+			SetCookie string `header:"Set-Cookie"`
+		}{SetCookie: clearedSessionCookie()}, nil
+	})
+
+	meOp := huma.Operation{
+		OperationID: "get-me",
+		Method:      http.MethodGet,
+		Path:        "/api/auth/me",
+		Summary:     "Get the current user",
+	}
+	addAuth(&meOp, api, queries)
+	huma.Register(api, meOp, func(ctx context.Context, input *struct{}) (*struct{ Body model.User }, error) {
+		return &struct{ Body model.User }{Body: userFromContext(ctx).toModel()}, nil
+	})
+}

internal/api/context.go

@@ -0,0 +1,38 @@
+package api
+
+import (
+	"context"
+
+	"github.com/google/uuid"
+
+	"completed/internal/model"
+)
+
+// authedUser is what AuthMiddleware stores in the request context after
+// validating a session token. Handlers read it with userFromContext.
+type authedUser struct {
+	ID    uuid.UUID
+	Email string
+	Name  string
+	Bio   string
+}
+
+type ctxKey string
+
+const userCtxKey ctxKey = "completed.user"
+
+func (u authedUser) toModel() model.User {
+	return model.User{ID: u.ID.String(), Email: u.Email, Name: u.Name, Bio: u.Bio}
+}
+
+// userFromContext returns the authenticated user set by AuthMiddleware. It
+// panics if called from a route that isn't behind AuthMiddleware, since that
+// is a programming error (a handler trusting a context value that was never
+// guaranteed to be there), not a condition callers should need to check.
+func userFromContext(ctx context.Context) authedUser {
+	u, ok := ctx.Value(userCtxKey).(authedUser)
+	if !ok {
+		panic("api: userFromContext called outside AuthMiddleware")
+	}
+	return u
+}

internal/api/errors.go

@@ -0,0 +1,52 @@
+package api
+
+import (
+	"errors"
+	"log"
+
+	"github.com/danielgtaylor/huma/v2"
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgconn"
+)
+
+// Postgres error codes this package maps to specific HTTP statuses.
+// See https://www.postgresql.org/docs/current/errcodes-appendix.html
+const (
+	pgCodeUniqueViolation     = "23505"
+	pgCodeForeignKeyViolation = "23503"
+)
+
+// dbError turns a database error into the huma error a handler should
+// return, so Postgres's own error text never reaches a client and callers
+// get the right HTTP status instead of a generic 500.
+func dbError(err error) error {
+	if errors.Is(err, pgx.ErrNoRows) {
+		return huma.Error404NotFound("not found")
+	}
+
+	var pgErr *pgconn.PgError
+	if errors.As(err, &pgErr) {
+		switch pgErr.Code {
+		case pgCodeUniqueViolation:
+			return huma.Error409Conflict("already exists")
+		case pgCodeForeignKeyViolation:
+			// A foreign key failure here is either a reference to a platform
+			// that doesn't exist (create/update) or a delete blocked by
+			// games that still reference this platform.
+			return huma.Error409Conflict("referenced by another record, or refers to one that doesn't exist")
+		}
+	}
+
+	log.Printf("unmapped database error: %v", err)
+	return huma.Error500InternalServerError("internal error")
+}
+
+// notFoundIfZero turns the "0 rows affected" result of a soft-delete
+// UPDATE into a 404, since the row either never existed or was already
+// deleted.
+func notFoundIfZero(rows int64) error {
+	if rows == 0 {
+		return huma.Error404NotFound("not found")
+	}
+	return nil
+}

internal/api/middleware.go

@@ -0,0 +1,88 @@
+package api
+
+import (
+	"context"
+	"errors"
+	"strings"
+
+	"github.com/danielgtaylor/huma/v2"
+	"github.com/jackc/pgx/v5"
+
+	"completed/internal/auth"
+	"completed/internal/db"
+)
+
+// sessionCookieName is also used by the auth routes when setting/clearing
+// the cookie, so it lives here as the one shared constant.
+const sessionCookieName = "session"
+
+// bearerToken extracts the token from "Authorization: Bearer <token>", or
+// the empty string if the header is missing or malformed.
+func bearerToken(header string) string {
+	const prefix = "Bearer "
+	if !strings.HasPrefix(header, prefix) {
+		return ""
+	}
+	return strings.TrimPrefix(header, prefix)
+}
+
+// tokenFromRequest looks for a session token in the Authorization header
+// first (used by the TUI and Fyne clients), falling back to the session
+// cookie (used by the web client).
+func tokenFromRequest(ctx huma.Context) string {
+	if t := bearerToken(ctx.Header("Authorization")); t != "" {
+		return t
+	}
+	if c, err := huma.ReadCookie(ctx, sessionCookieName); err == nil && c != nil {
+		return c.Value
+	}
+	return ""
+}
+
+// newAuthMiddleware returns Huma middleware that requires a valid session,
+// set via AuthMiddleware on individual operations. On success it stores the
+// authenticated user in the request context for userFromContext to read.
+func newAuthMiddleware(api huma.API, queries db.Querier) func(huma.Context, func(huma.Context)) {
+	return func(ctx huma.Context, next func(huma.Context)) {
+		token := tokenFromRequest(ctx)
+		if token == "" {
+			huma.WriteErr(api, ctx, 401, "authentication required")
+			return
+		}
+
+		row, err := queries.GetSessionAndUser(ctx.Context(), auth.HashSessionToken(token))
+		if err != nil {
+			if !errors.Is(err, pgx.ErrNoRows) {
+				// Fail closed: an unreachable DB fails auth, not through.
+				huma.WriteErr(api, ctx, 401, "authentication required")
+				return
+			}
+			huma.WriteErr(api, ctx, 401, "session expired or invalid")
+			return
+		}
+
+		// Best-effort; a failure to record activity shouldn't fail the request.
+		_ = queries.TouchSession(ctx.Context(), auth.HashSessionToken(token))
+
+		user := authedUser{ID: row.ID, Email: row.Email, Name: row.Name, Bio: row.Bio.String}
+		newCtx := huma.WithValue(ctx, userCtxKey, user)
+		newCtx = huma.WithValue(newCtx, tokenCtxKey, token)
+		next(newCtx)
+	}
+}
+
+// addAuth attaches the auth middleware to op, so it requires a valid
+// session. Call it on the *huma.Operation value before huma.Register.
+func addAuth(op *huma.Operation, api huma.API, queries db.Querier) {
+	op.Middlewares = append(op.Middlewares, newAuthMiddleware(api, queries))
+}
+
+// tokenCtxKey holds the raw bearer/cookie token for the current request, so
+// the logout handler can hash and delete the exact session that was used
+// without re-parsing the request.
+const tokenCtxKey ctxKey = "completed.token"
+
+func tokenFromContext(ctx context.Context) string {
+	t, _ := ctx.Value(tokenCtxKey).(string)
+	return t
+}

internal/api/mock_db_test.go

@@ -3,61 +3,84 @@ package api
 import (
 	"context"
 
+	"github.com/google/uuid"
+
 	"completed/internal/db"
 )
 
+// MockQuerier is a hand-written fake implementing db.Querier for handler
+// tests. Each test sets only the *Func fields its handler path reaches;
+// any other field left nil panics on call, which is deliberate: it makes an
+// unexpectedly-reached query visible as a test failure instead of a nil
+// pointer deep in sqlc-generated code.
 type MockQuerier struct {
-	CreateGameFunc     func(ctx context.Context, arg db.CreateGameParams) (db.Game, error)
-	CreatePlatformFunc func(ctx context.Context, name string) (db.Platform, error)
-	CreateUserFunc     func(ctx context.Context, arg db.CreateUserParams) (db.User, error)
-	DeleteGameFunc     func(ctx context.Context, id int64) error
-	DeletePlatformFunc func(ctx context.Context, id int64) error
-	DeleteUserFunc     func(ctx context.Context, id int64) error
-	GetGameFunc        func(ctx context.Context, id int64) (db.Game, error)
-	GetUserFunc        func(ctx context.Context, id int64) (db.User, error)
-	ListGamesFunc      func(ctx context.Context) ([]db.Game, error)
-	ListPlatformsFunc  func(ctx context.Context) ([]db.Platform, error)
-	ListUsersFunc      func(ctx context.Context) ([]db.User, error)
-	UpdateGameFunc     func(ctx context.Context, arg db.UpdateGameParams) (db.Game, error)
-	UpdatePlatformFunc func(ctx context.Context, arg db.UpdatePlatformParams) (db.Platform, error)
+	CreateGameFunc        func(ctx context.Context, arg db.CreateGameParams) (db.CreateGameRow, error)
+	CreatePlatformFunc    func(ctx context.Context, arg db.CreatePlatformParams) (db.CreatePlatformRow, error)
+	CreateSessionFunc     func(ctx context.Context, arg db.CreateSessionParams) error
+	CreateUserFunc        func(ctx context.Context, arg db.CreateUserParams) (db.CreateUserRow, error)
+	DeleteGameFunc        func(ctx context.Context, arg db.DeleteGameParams) (int64, error)
+	DeletePlatformFunc    func(ctx context.Context, arg db.DeletePlatformParams) (int64, error)
+	DeleteSessionFunc     func(ctx context.Context, tokenHash []byte) error
+	GetGameFunc           func(ctx context.Context, arg db.GetGameParams) (db.GetGameRow, error)
+	GetPlatformFunc       func(ctx context.Context, arg db.GetPlatformParams) (db.GetPlatformRow, error)
+	GetSessionAndUserFunc func(ctx context.Context, tokenHash []byte) (db.GetSessionAndUserRow, error)
+	GetUserByEmailFunc    func(ctx context.Context, email string) (db.GetUserByEmailRow, error)
+	GetUserByIDFunc       func(ctx context.Context, id uuid.UUID) (db.GetUserByIDRow, error)
+	ListGamesFunc         func(ctx context.Context, userID uuid.UUID) ([]db.ListGamesRow, error)
+	ListPlatformsFunc     func(ctx context.Context, userID uuid.UUID) ([]db.ListPlatformsRow, error)
+	TouchSessionFunc      func(ctx context.Context, tokenHash []byte) error
+	UpdateGameFunc        func(ctx context.Context, arg db.UpdateGameParams) (db.UpdateGameRow, error)
+	UpdatePlatformFunc    func(ctx context.Context, arg db.UpdatePlatformParams) (db.UpdatePlatformRow, error)
 }
 
-func (m *MockQuerier) CreateGame(ctx context.Context, arg db.CreateGameParams) (db.Game, error) {
+func (m *MockQuerier) CreateGame(ctx context.Context, arg db.CreateGameParams) (db.CreateGameRow, error) {
 	return m.CreateGameFunc(ctx, arg)
 }
-func (m *MockQuerier) CreatePlatform(ctx context.Context, name string) (db.Platform, error) {
-	return m.CreatePlatformFunc(ctx, name)
+func (m *MockQuerier) CreatePlatform(ctx context.Context, arg db.CreatePlatformParams) (db.CreatePlatformRow, error) {
+	return m.CreatePlatformFunc(ctx, arg)
 }
-func (m *MockQuerier) CreateUser(ctx context.Context, arg db.CreateUserParams) (db.User, error) {
+func (m *MockQuerier) CreateSession(ctx context.Context, arg db.CreateSessionParams) error {
+	return m.CreateSessionFunc(ctx, arg)
+}
+func (m *MockQuerier) CreateUser(ctx context.Context, arg db.CreateUserParams) (db.CreateUserRow, error) {
 	return m.CreateUserFunc(ctx, arg)
 }
-func (m *MockQuerier) DeleteGame(ctx context.Context, id int64) error {
-	return m.DeleteGameFunc(ctx, id)
+func (m *MockQuerier) DeleteGame(ctx context.Context, arg db.DeleteGameParams) (int64, error) {
+	return m.DeleteGameFunc(ctx, arg)
 }
-func (m *MockQuerier) DeletePlatform(ctx context.Context, id int64) error {
-	return m.DeletePlatformFunc(ctx, id)
+func (m *MockQuerier) DeletePlatform(ctx context.Context, arg db.DeletePlatformParams) (int64, error) {
+	return m.DeletePlatformFunc(ctx, arg)
 }
-func (m *MockQuerier) DeleteUser(ctx context.Context, id int64) error {
-	return m.DeleteUserFunc(ctx, id)
+func (m *MockQuerier) DeleteSession(ctx context.Context, tokenHash []byte) error {
+	return m.DeleteSessionFunc(ctx, tokenHash)
 }
-func (m *MockQuerier) GetGame(ctx context.Context, id int64) (db.Game, error) {
-	return m.GetGameFunc(ctx, id)
+func (m *MockQuerier) GetGame(ctx context.Context, arg db.GetGameParams) (db.GetGameRow, error) {
+	return m.GetGameFunc(ctx, arg)
 }
-func (m *MockQuerier) GetUser(ctx context.Context, id int64) (db.User, error) {
-	return m.GetUserFunc(ctx, id)
+func (m *MockQuerier) GetPlatform(ctx context.Context, arg db.GetPlatformParams) (db.GetPlatformRow, error) {
+	return m.GetPlatformFunc(ctx, arg)
 }
-func (m *MockQuerier) ListGames(ctx context.Context) ([]db.Game, error) {
-	return m.ListGamesFunc(ctx)
+func (m *MockQuerier) GetSessionAndUser(ctx context.Context, tokenHash []byte) (db.GetSessionAndUserRow, error) {
+	return m.GetSessionAndUserFunc(ctx, tokenHash)
 }
-func (m *MockQuerier) ListPlatforms(ctx context.Context) ([]db.Platform, error) {
-	return m.ListPlatformsFunc(ctx)
+func (m *MockQuerier) GetUserByEmail(ctx context.Context, email string) (db.GetUserByEmailRow, error) {
+	return m.GetUserByEmailFunc(ctx, email)
 }
-func (m *MockQuerier) ListUsers(ctx context.Context) ([]db.User, error) {
-	return m.ListUsersFunc(ctx)
+func (m *MockQuerier) GetUserByID(ctx context.Context, id uuid.UUID) (db.GetUserByIDRow, error) {
+	return m.GetUserByIDFunc(ctx, id)
 }
-func (m *MockQuerier) UpdateGame(ctx context.Context, arg db.UpdateGameParams) (db.Game, error) {
+func (m *MockQuerier) ListGames(ctx context.Context, userID uuid.UUID) ([]db.ListGamesRow, error) {
+	return m.ListGamesFunc(ctx, userID)
+}
+func (m *MockQuerier) ListPlatforms(ctx context.Context, userID uuid.UUID) ([]db.ListPlatformsRow, error) {
+	return m.ListPlatformsFunc(ctx, userID)
+}
+func (m *MockQuerier) TouchSession(ctx context.Context, tokenHash []byte) error {
+	return m.TouchSessionFunc(ctx, tokenHash)
+}
+func (m *MockQuerier) UpdateGame(ctx context.Context, arg db.UpdateGameParams) (db.UpdateGameRow, error) {
 	return m.UpdateGameFunc(ctx, arg)
 }
-func (m *MockQuerier) UpdatePlatform(ctx context.Context, arg db.UpdatePlatformParams) (db.Platform, error) {
+func (m *MockQuerier) UpdatePlatform(ctx context.Context, arg db.UpdatePlatformParams) (db.UpdatePlatformRow, error) {
 	return m.UpdatePlatformFunc(ctx, arg)
 }

internal/api/routes.go

@@ -6,9 +6,11 @@ import (
 	"time"
 
 	"github.com/danielgtaylor/huma/v2"
+	"github.com/google/uuid"
 	"github.com/jackc/pgx/v5/pgtype"
 
 	"completed/internal/db"
+	"completed/internal/model"
 )
 
 func RegisterRoutes(api huma.API, queries db.Querier) {
@@ -33,83 +35,118 @@ func RegisterRoutes(api huma.API, queries db.Querier) {
 		return resp, nil
 	})
 
+	registerAuthRoutes(api, queries)
 	registerPlatformRoutes(api, queries)
 	registerGameRoutes(api, queries)
 }
 
 // --- Platform Routes ---
 
-// PlatformDTO ensures consistent JSON output
-type PlatformDTO struct {
-	ID   int64  `json:"id"`
-	Name string `json:"name"`
-}
-
-type PlatformInput struct {
-	Name string `json:"name" doc:"Name of the platform"`
-}
-
 func registerPlatformRoutes(api huma.API, queries db.Querier) {
-	huma.Register(api, huma.Operation{
+	listOp := huma.Operation{
 		OperationID: "list-platforms",
 		Method:      http.MethodGet,
-		Path:        "/platforms",
+		Path:        "/api/platforms",
 		Summary:     "List Platforms",
-	}, func(ctx context.Context, input *struct{}) (*struct{ Body []PlatformDTO }, error) {
-		platforms, err := queries.ListPlatforms(ctx)
+	}
+	addAuth(&listOp, api, queries)
+	huma.Register(api, listOp, func(ctx context.Context, input *struct{}) (*struct{ Body []model.Platform }, error) {
+		platforms, err := queries.ListPlatforms(ctx, userFromContext(ctx).ID)
 		if err != nil {
-			return nil, huma.Error500InternalServerError("Database error: " + err.Error())
+			return nil, dbError(err)
 		}
-		dtos := make([]PlatformDTO, len(platforms))
+		dtos := make([]model.Platform, len(platforms))
 		for i, p := range platforms {
-			dtos[i] = PlatformDTO{ID: p.ID, Name: p.Name}
+			dtos[i] = model.Platform{ID: p.ID.String(), Name: p.Name}
 		}
-		return &struct{ Body []PlatformDTO }{Body: dtos}, nil
+		return &struct{ Body []model.Platform }{Body: dtos}, nil
 	})
 
-	huma.Register(api, huma.Operation{
+	getOp := huma.Operation{
+		OperationID: "get-platform",
+		Method:      http.MethodGet,
+		Path:        "/api/platforms/{id}",
+		Summary:     "Get Platform",
+	}
+	addAuth(&getOp, api, queries)
+	huma.Register(api, getOp, func(ctx context.Context, input *struct {
+		ID uuid.UUID `path:"id"`
+	}) (*struct{ Body model.Platform }, error) {
+		p, err := queries.GetPlatform(ctx, db.GetPlatformParams{ID: input.ID, UserID: userFromContext(ctx).ID})
+		if err != nil {
+			return nil, dbError(err)
+		}
+		return &struct{ Body model.Platform }{Body: model.Platform{ID: p.ID.String(), Name: p.Name}}, nil
+	})
+
+	createOp := huma.Operation{
 		OperationID: "create-platform",
 		Method:      http.MethodPost,
-		Path:        "/platforms",
+		Path:        "/api/platforms",
 		Summary:     "Create Platform",
-	}, func(ctx context.Context, input *struct{ Body PlatformInput }) (*struct{ Body PlatformDTO }, error) {
-		platform, err := queries.CreatePlatform(ctx, input.Body.Name)
-		if err != nil {
-			return nil, huma.Error500InternalServerError("Database error: " + err.Error())
-		}
-		return &struct{ Body PlatformDTO }{Body: PlatformDTO{ID: platform.ID, Name: platform.Name}}, nil
-	})
-
-	huma.Register(api, huma.Operation{
-		OperationID: "update-platform",
-		Method:      http.MethodPut,
-		Path:        "/platforms/{id}",
-		Summary:     "Update Platform",
-	}, func(ctx context.Context, input *struct {
-		ID   int64 `path:"id"`
-		Body PlatformInput
-	}) (*struct{ Body PlatformDTO }, error) {
-		platform, err := queries.UpdatePlatform(ctx, db.UpdatePlatformParams{
-			ID:   input.ID,
-			Name: input.Body.Name,
+	}
+	addAuth(&createOp, api, queries)
+	huma.Register(api, createOp, func(ctx context.Context, input *struct{ Body model.PlatformInput }) (*struct{ Body model.Platform }, error) {
+		platform, err := queries.CreatePlatform(ctx, db.CreatePlatformParams{
+			UserID: userFromContext(ctx).ID,
+			Name:   input.Body.Name,
 		})
 		if err != nil {
-			return nil, huma.Error500InternalServerError("Database error: " + err.Error())
+			return nil, dbError(err)
 		}
-		return &struct{ Body PlatformDTO }{Body: PlatformDTO{ID: platform.ID, Name: platform.Name}}, nil
+		return &struct{ Body model.Platform }{Body: model.Platform{ID: platform.ID.String(), Name: platform.Name}}, nil
 	})
 
-	huma.Register(api, huma.Operation{
+	updateOp := huma.Operation{
+		OperationID: "update-platform",
+		Method:      http.MethodPut,
+		Path:        "/api/platforms/{id}",
+		Summary:     "Update Platform",
+	}
+	addAuth(&updateOp, api, queries)
+	huma.Register(api, updateOp, func(ctx context.Context, input *struct {
+		ID   uuid.UUID `path:"id"`
+		Body model.PlatformInput
+	}) (*struct{ Body model.Platform }, error) {
+		platform, err := queries.UpdatePlatform(ctx, db.UpdatePlatformParams{
+			ID:     input.ID,
+			UserID: userFromContext(ctx).ID,
+			Name:   input.Body.Name,
+		})
+		if err != nil {
+			return nil, dbError(err)
+		}
+		return &struct{ Body model.Platform }{Body: model.Platform{ID: platform.ID.String(), Name: platform.Name}}, nil
+	})
+
+	deleteOp := huma.Operation{
 		OperationID: "delete-platform",
 		Method:      http.MethodDelete,
-		Path:        "/platforms/{id}",
+		Path:        "/api/platforms/{id}",
 		Summary:     "Delete Platform",
-	}, func(ctx context.Context, input *struct {
-		ID int64 `path:"id"`
+	}
+	addAuth(&deleteOp, api, queries)
+	huma.Register(api, deleteOp, func(ctx context.Context, input *struct {
+		ID uuid.UUID `path:"id"`
 	}) (*struct{}, error) {
-		err := queries.DeletePlatform(ctx, input.ID)
+		userID := userFromContext(ctx).ID
+		// Checked separately so a 0-rows result from DeletePlatform below can
+		// only mean "blocked by games referencing it", not "doesn't exist" -
+		// soft delete means the FK alone can't tell the two apart (see
+		// DeletePlatform's comment in db/query.sql). Accepts a race where
+		// the platform is deleted between these two queries; harmless, since
+		// the second query would then just affect 0 rows and report 409
+		// instead of the 404 a plain retry would hit anyway.
+		if _, err := queries.GetPlatform(ctx, db.GetPlatformParams{ID: input.ID, UserID: userID}); err != nil {
+			return nil, dbError(err)
+		}
+
+		rows, err := queries.DeletePlatform(ctx, db.DeletePlatformParams{ID: input.ID, UserID: userID})
 		if err != nil {
-			return nil, huma.Error500InternalServerError("Database error: " + err.Error())
+			return nil, dbError(err)
+		}
+		if rows == 0 {
+			return nil, huma.Error409Conflict("platform still has games; delete or reassign them first")
 		}
 		return nil, nil
 	})
@@ -117,40 +154,21 @@ func registerPlatformRoutes(api huma.API, queries db.Querier) {
 
 // --- Game Routes ---
 
-// GameDTO for API communication (Clean JSON)
-type GameDTO struct {
-	ID          int64  `json:"id"`
-	Name        string `json:"name"`
-	PlatformID  int64  `json:"platform_id"`
-	Score       int32  `json:"score"`
-	ReleaseYear string `json:"release_year" format:"date" doc:"YYYY-MM-DD"`
-	Finished    string `json:"finished,omitempty" format:"date" doc:"YYYY-MM-DD (optional)"`
-}
-
-type GameInput struct {
-	Name        string `json:"name"`
-	PlatformID  int64  `json:"platform_id"`
-	Score       int32  `json:"score"`
-	ReleaseYear string `json:"release_year" format:"date" doc:"YYYY-MM-DD"`
-	Finished    string `json:"finished,omitempty" format:"date" doc:"YYYY-MM-DD (optional)"`
-}
-
-// Helper to convert DB Game to DTO
-func toGameDTO(g db.Game) GameDTO {
-	dto := GameDTO{
-		ID:          g.ID,
-		Name:        g.Name,
-		PlatformID:  g.PlatformID,
-		Score:       g.Score,
-		ReleaseYear: g.ReleaseYear.Time.Format("2006-01-02"),
+// formatDate and parseDate convert between the API's YYYY-MM-DD strings and
+// pgtype.Date. CreateGame, GetGame, ListGames and UpdateGame each return a
+// distinct sqlc row type with identical fields (id/name/platform_id/
+// platform_name/score/release_date/finished), so the DTO conversion itself
+// is written out at each call site rather than factored into one function.
+func formatDate(d pgtype.Date) string {
+	if !d.Valid {
+		return ""
 	}
-	if g.Finished.Valid {
-		dto.Finished = g.Finished.Time.Format("2006-01-02")
-	}
-	return dto
+	return d.Time.Format("2006-01-02")
 }
 
-// Helper to parse date string to pgtype.Date
+// parseDate parses a YYYY-MM-DD string into a pgtype.Date. An empty string
+// parses to an invalid/NULL date, which is valid for the optional
+// "finished" field but rejected separately for the required release_date.
 func parseDate(s string) (pgtype.Date, error) {
 	if s == "" {
 		return pgtype.Date{}, nil
@@ -163,95 +181,162 @@ func parseDate(s string) (pgtype.Date, error) {
 }
 
 func registerGameRoutes(api huma.API, queries db.Querier) {
-	huma.Register(api, huma.Operation{
+	listOp := huma.Operation{
 		OperationID: "list-games",
 		Method:      http.MethodGet,
-		Path:        "/games",
+		Path:        "/api/games",
 		Summary:     "List Games",
-	}, func(ctx context.Context, input *struct{}) (*struct{ Body []GameDTO }, error) {
-		games, err := queries.ListGames(ctx)
+	}
+	addAuth(&listOp, api, queries)
+	huma.Register(api, listOp, func(ctx context.Context, input *struct{}) (*struct{ Body []model.Game }, error) {
+		games, err := queries.ListGames(ctx, userFromContext(ctx).ID)
 		if err != nil {
-			return nil, huma.Error500InternalServerError("Database error: " + err.Error())
+			return nil, dbError(err)
 		}
-		dtos := make([]GameDTO, len(games))
+		dtos := make([]model.Game, len(games))
 		for i, g := range games {
-			dtos[i] = toGameDTO(g)
+			dtos[i] = model.Game{
+				ID:           g.ID.String(),
+				Name:         g.Name,
+				PlatformID:   g.PlatformID.String(),
+				PlatformName: g.PlatformName,
+				Score:        g.Score,
+				ReleaseDate:  formatDate(g.ReleaseDate),
+				Finished:     formatDate(g.Finished),
+			}
 		}
-		return &struct{ Body []GameDTO }{Body: dtos}, nil
+		return &struct{ Body []model.Game }{Body: dtos}, nil
 	})
 
-	huma.Register(api, huma.Operation{
+	getOp := huma.Operation{
+		OperationID: "get-game",
+		Method:      http.MethodGet,
+		Path:        "/api/games/{id}",
+		Summary:     "Get Game",
+	}
+	addAuth(&getOp, api, queries)
+	huma.Register(api, getOp, func(ctx context.Context, input *struct {
+		ID uuid.UUID `path:"id"`
+	}) (*struct{ Body model.Game }, error) {
+		g, err := queries.GetGame(ctx, db.GetGameParams{ID: input.ID, UserID: userFromContext(ctx).ID})
+		if err != nil {
+			return nil, dbError(err)
+		}
+		return &struct{ Body model.Game }{Body: model.Game{
+			ID:           g.ID.String(),
+			Name:         g.Name,
+			PlatformID:   g.PlatformID.String(),
+			PlatformName: g.PlatformName,
+			Score:        g.Score,
+			ReleaseDate:  formatDate(g.ReleaseDate),
+			Finished:     formatDate(g.Finished),
+		}}, nil
+	})
+
+	createOp := huma.Operation{
 		OperationID: "create-game",
 		Method:      http.MethodPost,
-		Path:        "/games",
+		Path:        "/api/games",
 		Summary:     "Create Game",
-	}, func(ctx context.Context, input *struct{ Body GameInput }) (*struct{ Body GameDTO }, error) {
-		ry, err := parseDate(input.Body.ReleaseYear)
+	}
+	addAuth(&createOp, api, queries)
+	huma.Register(api, createOp, func(ctx context.Context, input *struct{ Body model.GameInput }) (*struct{ Body model.Game }, error) {
+		platformID, err := uuid.Parse(input.Body.PlatformID)
 		if err != nil {
-			return nil, huma.Error400BadRequest("Invalid release_year format (expected YYYY-MM-DD)")
+			return nil, huma.Error400BadRequest("invalid platform_id")
+		}
+		ry, err := parseDate(input.Body.ReleaseDate)
+		if err != nil || !ry.Valid {
+			return nil, huma.Error400BadRequest("invalid or missing release_date (expected YYYY-MM-DD)")
 		}
 		fin, err := parseDate(input.Body.Finished)
 		if err != nil {
-			return nil, huma.Error400BadRequest("Invalid finished format (expected YYYY-MM-DD)")
+			return nil, huma.Error400BadRequest("invalid finished date (expected YYYY-MM-DD)")
 		}
 
 		game, err := queries.CreateGame(ctx, db.CreateGameParams{
+			UserID:      userFromContext(ctx).ID,
+			PlatformID:  platformID,
 			Name:        input.Body.Name,
-			PlatformID:  input.Body.PlatformID,
 			Score:       input.Body.Score,
-			ReleaseYear: ry,
+			ReleaseDate: ry,
 			Finished:    fin,
 		})
 		if err != nil {
-			return nil, huma.Error500InternalServerError("Database error: " + err.Error())
+			return nil, dbError(err)
 		}
-		return &struct{ Body GameDTO }{Body: toGameDTO(game)}, nil
+		return &struct{ Body model.Game }{Body: model.Game{
+			ID:           game.ID.String(),
+			Name:         game.Name,
+			PlatformID:   game.PlatformID.String(),
+			PlatformName: game.PlatformName,
+			Score:        game.Score,
+			ReleaseDate:  formatDate(game.ReleaseDate),
+			Finished:     formatDate(game.Finished),
+		}}, nil
 	})
 
-	huma.Register(api, huma.Operation{
+	updateOp := huma.Operation{
 		OperationID: "update-game",
 		Method:      http.MethodPut,
-		Path:        "/games/{id}",
+		Path:        "/api/games/{id}",
 		Summary:     "Update Game",
-	}, func(ctx context.Context, input *struct {
-		ID   int64 `path:"id"`
-		Body GameInput
-	}) (*struct{ Body GameDTO }, error) {
-		ry, err := parseDate(input.Body.ReleaseYear)
+	}
+	addAuth(&updateOp, api, queries)
+	huma.Register(api, updateOp, func(ctx context.Context, input *struct {
+		ID   uuid.UUID `path:"id"`
+		Body model.GameInput
+	}) (*struct{ Body model.Game }, error) {
+		platformID, err := uuid.Parse(input.Body.PlatformID)
 		if err != nil {
-			return nil, huma.Error400BadRequest("Invalid release_year format (expected YYYY-MM-DD)")
+			return nil, huma.Error400BadRequest("invalid platform_id")
+		}
+		ry, err := parseDate(input.Body.ReleaseDate)
+		if err != nil || !ry.Valid {
+			return nil, huma.Error400BadRequest("invalid or missing release_date (expected YYYY-MM-DD)")
 		}
 		fin, err := parseDate(input.Body.Finished)
 		if err != nil {
-			return nil, huma.Error400BadRequest("Invalid finished format (expected YYYY-MM-DD)")
+			return nil, huma.Error400BadRequest("invalid finished date (expected YYYY-MM-DD)")
 		}
 
 		game, err := queries.UpdateGame(ctx, db.UpdateGameParams{
 			ID:          input.ID,
+			UserID:      userFromContext(ctx).ID,
+			PlatformID:  platformID,
 			Name:        input.Body.Name,
-			PlatformID:  input.Body.PlatformID,
 			Score:       input.Body.Score,
-			ReleaseYear: ry,
+			ReleaseDate: ry,
 			Finished:    fin,
 		})
 		if err != nil {
-			return nil, huma.Error500InternalServerError("Database error: " + err.Error())
+			return nil, dbError(err)
 		}
-		return &struct{ Body GameDTO }{Body: toGameDTO(game)}, nil
+		return &struct{ Body model.Game }{Body: model.Game{
+			ID:           game.ID.String(),
+			Name:         game.Name,
+			PlatformID:   game.PlatformID.String(),
+			PlatformName: game.PlatformName,
+			Score:        game.Score,
+			ReleaseDate:  formatDate(game.ReleaseDate),
+			Finished:     formatDate(game.Finished),
+		}}, nil
 	})
 
-	huma.Register(api, huma.Operation{
+	deleteOp := huma.Operation{
 		OperationID: "delete-game",
 		Method:      http.MethodDelete,
-		Path:        "/games/{id}",
+		Path:        "/api/games/{id}",
 		Summary:     "Delete Game",
-	}, func(ctx context.Context, input *struct {
-		ID int64 `path:"id"`
+	}
+	addAuth(&deleteOp, api, queries)
+	huma.Register(api, deleteOp, func(ctx context.Context, input *struct {
+		ID uuid.UUID `path:"id"`
 	}) (*struct{}, error) {
-		err := queries.DeleteGame(ctx, input.ID)
+		rows, err := queries.DeleteGame(ctx, db.DeleteGameParams{ID: input.ID, UserID: userFromContext(ctx).ID})
 		if err != nil {
-			return nil, huma.Error500InternalServerError("Database error: " + err.Error())
+			return nil, dbError(err)
 		}
-		return nil, nil
+		return nil, notFoundIfZero(rows)
 	})
 }

internal/api/routes_test.go

@@ -9,58 +9,223 @@ import (
 
 	"github.com/danielgtaylor/huma/v2"
 	"github.com/danielgtaylor/huma/v2/adapters/humaecho"
+	"github.com/google/uuid"
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgconn"
 	"github.com/labstack/echo/v4"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 
+	"completed/internal/auth"
 	"completed/internal/db"
 )
 
-func TestListGames(t *testing.T) {
-	// 1. Setup Mock
-	mockDB := &MockQuerier{
-		ListGamesFunc: func(ctx context.Context) ([]db.Game, error) {
-			return []db.Game{
-				{ID: 1, Name: "Test Game", Score: 90},
-			}, nil
-		},
-	}
-
-	// 2. Setup API
+// newTestAPI wires mockDB into a fresh Huma/Echo instance exactly as
+// cmd/api/main.go does, so tests exercise routing and middleware, not just
+// the handler bodies.
+func newTestAPI(mockDB db.Querier) (*echo.Echo, huma.API) {
 	e := echo.New()
 	api := humaecho.New(e, huma.DefaultConfig("Test API", "1.0.0"))
 	RegisterRoutes(api, mockDB)
+	return e, api
+}
 
-	// 3. Execute Request
-	req := httptest.NewRequest(http.MethodGet, "/games", nil)
+// a fixed valid session, returned by GetSessionAndUserFunc so authed
+// requests don't need a real database.
+var testUserID = uuid.New()
+
+func authedMock() *MockQuerier {
+	return &MockQuerier{
+		GetSessionAndUserFunc: func(ctx context.Context, tokenHash []byte) (db.GetSessionAndUserRow, error) {
+			return db.GetSessionAndUserRow{ID: testUserID, Email: "a@example.com", Name: "Alice"}, nil
+		},
+		TouchSessionFunc: func(ctx context.Context, tokenHash []byte) error { return nil },
+	}
+}
+
+func authedRequest(method, path, body string) *http.Request {
+	var req *http.Request
+	if body == "" {
+		req = httptest.NewRequest(method, path, nil)
+	} else {
+		req = httptest.NewRequest(method, path, strings.NewReader(body))
+		req.Header.Set("Content-Type", "application/json")
+	}
+	req.Header.Set("Authorization", "Bearer any-token-the-mock-accepts")
+	return req
+}
+
+func TestListGamesRequiresAuth(t *testing.T) {
+	e, _ := newTestAPI(&MockQuerier{})
+
+	req := httptest.NewRequest(http.MethodGet, "/api/games", nil)
 	rec := httptest.NewRecorder()
 	e.ServeHTTP(rec, req)
 
-	// 4. Assert
+	assert.Equal(t, http.StatusUnauthorized, rec.Code)
+}
+
+func TestListGames(t *testing.T) {
+	mockDB := authedMock()
+	mockDB.ListGamesFunc = func(ctx context.Context, userID uuid.UUID) ([]db.ListGamesRow, error) {
+		assert.Equal(t, testUserID, userID, "handler must scope the query to the authenticated user")
+		return []db.ListGamesRow{
+			{ID: uuid.New(), Name: "Test Game", Score: 90, PlatformName: "PC"},
+		}, nil
+	}
+
+	e, _ := newTestAPI(mockDB)
+	rec := httptest.NewRecorder()
+	e.ServeHTTP(rec, authedRequest(http.MethodGet, "/api/games", ""))
+
 	assert.Equal(t, http.StatusOK, rec.Code)
 	assert.Contains(t, rec.Body.String(), "Test Game")
+	assert.Contains(t, rec.Body.String(), `"platform_name":"PC"`)
+}
+
+func TestGetGameNotFoundForOtherUsersGame(t *testing.T) {
+	// A game that exists, but belongs to someone else: the query is scoped
+	// by user_id, so sqlc/postgres report it as not found, same as a
+	// genuinely missing id. The handler must turn that into 404, not 500.
+	mockDB := authedMock()
+	mockDB.GetGameFunc = func(ctx context.Context, arg db.GetGameParams) (db.GetGameRow, error) {
+		assert.Equal(t, testUserID, arg.UserID, "handler must scope the lookup to the authenticated user")
+		return db.GetGameRow{}, pgx.ErrNoRows
+	}
+
+	e, _ := newTestAPI(mockDB)
+	rec := httptest.NewRecorder()
+	e.ServeHTTP(rec, authedRequest(http.MethodGet, "/api/games/"+uuid.New().String(), ""))
+
+	assert.Equal(t, http.StatusNotFound, rec.Code)
+}
+
+func TestDeleteGameNotFoundWhenNoRowsAffected(t *testing.T) {
+	mockDB := authedMock()
+	mockDB.DeleteGameFunc = func(ctx context.Context, arg db.DeleteGameParams) (int64, error) {
+		return 0, nil
+	}
+
+	e, _ := newTestAPI(mockDB)
+	rec := httptest.NewRecorder()
+	e.ServeHTTP(rec, authedRequest(http.MethodDelete, "/api/games/"+uuid.New().String(), ""))
+
+	assert.Equal(t, http.StatusNotFound, rec.Code)
+}
+
+func TestDeletePlatformConflictWhenReferencedByGames(t *testing.T) {
+	// Soft delete means the FK is never actually checked by Postgres (see
+	// db/query.sql's DeletePlatform comment), so the handler has to notice
+	// the 0-rows result itself and turn it into 409, not just pass through
+	// whatever error (if any) the query returns.
+	mockDB := authedMock()
+	mockDB.GetPlatformFunc = func(ctx context.Context, arg db.GetPlatformParams) (db.GetPlatformRow, error) {
+		return db.GetPlatformRow{ID: arg.ID, Name: "PC"}, nil
+	}
+	mockDB.DeletePlatformFunc = func(ctx context.Context, arg db.DeletePlatformParams) (int64, error) {
+		return 0, nil
+	}
+
+	e, _ := newTestAPI(mockDB)
+	rec := httptest.NewRecorder()
+	e.ServeHTTP(rec, authedRequest(http.MethodDelete, "/api/platforms/"+uuid.New().String(), ""))
+
+	assert.Equal(t, http.StatusConflict, rec.Code)
+}
+
+func TestDeletePlatformNotFound(t *testing.T) {
+	mockDB := authedMock()
+	mockDB.GetPlatformFunc = func(ctx context.Context, arg db.GetPlatformParams) (db.GetPlatformRow, error) {
+		return db.GetPlatformRow{}, pgx.ErrNoRows
+	}
+
+	e, _ := newTestAPI(mockDB)
+	rec := httptest.NewRecorder()
+	e.ServeHTTP(rec, authedRequest(http.MethodDelete, "/api/platforms/"+uuid.New().String(), ""))
+
+	assert.Equal(t, http.StatusNotFound, rec.Code)
+}
+
+func TestCreateGameRejectsScoreOutOfRange(t *testing.T) {
+	mockDB := authedMock()
+	// No CreateGameFunc set: validation must reject the request before the
+	// handler ever calls the database, or this test would panic.
+
+	e, _ := newTestAPI(mockDB)
+	rec := httptest.NewRecorder()
+	body := `{"name":"Bad","platform_id":"` + uuid.New().String() + `","score":150,"release_date":"2020-01-01"}`
+	e.ServeHTTP(rec, authedRequest(http.MethodPost, "/api/games", body))
+
+	assert.Equal(t, http.StatusUnprocessableEntity, rec.Code)
 }
 
 func TestCreatePlatform(t *testing.T) {
-	// 1. Setup Mock
+	mockDB := authedMock()
+	mockDB.CreatePlatformFunc = func(ctx context.Context, arg db.CreatePlatformParams) (db.CreatePlatformRow, error) {
+		assert.Equal(t, testUserID, arg.UserID)
+		return db.CreatePlatformRow{ID: uuid.New(), Name: arg.Name}, nil
+	}
+
+	e, _ := newTestAPI(mockDB)
+	rec := httptest.NewRecorder()
+	e.ServeHTTP(rec, authedRequest(http.MethodPost, "/api/platforms", `{"name": "Sega Genesis"}`))
+
+	assert.Equal(t, http.StatusOK, rec.Code)
+	assert.Contains(t, rec.Body.String(), "Sega Genesis")
+}
+
+func TestRegisterDuplicateEmailConflicts(t *testing.T) {
 	mockDB := &MockQuerier{
-		CreatePlatformFunc: func(ctx context.Context, name string) (db.Platform, error) {
-			return db.Platform{ID: 1, Name: name}, nil
+		CreateUserFunc: func(ctx context.Context, arg db.CreateUserParams) (db.CreateUserRow, error) {
+			return db.CreateUserRow{}, &pgconn.PgError{Code: pgCodeUniqueViolation}
 		},
 	}
 
-	// 2. Setup API
-	e := echo.New()
-	api := humaecho.New(e, huma.DefaultConfig("Test API", "1.0.0"))
-	RegisterRoutes(api, mockDB)
-
-	// 3. Execute Request
-	req := httptest.NewRequest(http.MethodPost, "/platforms", strings.NewReader(`{"name": "Sega Genesis"}`))
-	req.Header.Set("Content-Type", "application/json")
+	e, _ := newTestAPI(mockDB)
 	rec := httptest.NewRecorder()
-	e.ServeHTTP(rec, req)
+	body := `{"email":"a@example.com","password":"password123","name":"Alice"}`
+	e.ServeHTTP(rec, authedRequest(http.MethodPost, "/api/auth/register", body))
 
-	// 4. Assert
+	assert.Equal(t, http.StatusConflict, rec.Code)
+}
+
+func TestLoginWrongPasswordUnauthorized(t *testing.T) {
+	hash, err := auth.HashPassword("correct-password")
+	require.NoError(t, err)
+
+	mockDB := &MockQuerier{
+		GetUserByEmailFunc: func(ctx context.Context, email string) (db.GetUserByEmailRow, error) {
+			return db.GetUserByEmailRow{ID: testUserID, Email: email, PasswordHash: hash}, nil
+		},
+	}
+
+	e, _ := newTestAPI(mockDB)
+	rec := httptest.NewRecorder()
+	body := `{"email":"a@example.com","password":"wrong-password"}`
+	e.ServeHTTP(rec, authedRequest(http.MethodPost, "/api/auth/login", body))
+
+	assert.Equal(t, http.StatusUnauthorized, rec.Code)
+}
+
+func TestLoginSuccessSetsSessionCookie(t *testing.T) {
+	hash, err := auth.HashPassword("correct-password")
+	require.NoError(t, err)
+
+	mockDB := &MockQuerier{
+		GetUserByEmailFunc: func(ctx context.Context, email string) (db.GetUserByEmailRow, error) {
+			return db.GetUserByEmailRow{ID: testUserID, Email: email, Name: "Alice", PasswordHash: hash}, nil
+		},
+		CreateSessionFunc: func(ctx context.Context, arg db.CreateSessionParams) error {
+			assert.Equal(t, testUserID, arg.UserID)
+			return nil
+		},
+	}
+
+	e, _ := newTestAPI(mockDB)
+	rec := httptest.NewRecorder()
+	body := `{"email":"a@example.com","password":"correct-password"}`
+	e.ServeHTTP(rec, authedRequest(http.MethodPost, "/api/auth/login", body))
+
 	assert.Equal(t, http.StatusOK, rec.Code)
-	assert.Contains(t, rec.Body.String(), "Sega Genesis")
-	assert.Contains(t, rec.Body.String(), `"id":1`)
+	assert.Contains(t, rec.Header().Get("Set-Cookie"), "session=")
 }

internal/auth/password.go

@@ -0,0 +1,69 @@
+// Package auth handles password hashing and session tokens.
+package auth
+
+import (
+	"crypto/rand"
+	"crypto/subtle"
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"strings"
+
+	"golang.org/x/crypto/argon2"
+)
+
+// Argon2id parameters, taken from the RFC 9106 "low memory" recommendation
+// (2nd choice) as a reasonable default for a server handling interactive
+// logins without dedicated hardware.
+const (
+	argonTime    = 2
+	argonMemory  = 19 * 1024 // KiB
+	argonThreads = 1
+	argonKeyLen  = 32
+	saltLen      = 16
+)
+
+// HashPassword returns a self-describing hash string: algorithm, parameters,
+// salt and key are all encoded together so the parameters can change later
+// without invalidating hashes already stored.
+func HashPassword(password string) (string, error) {
+	salt := make([]byte, saltLen)
+	if _, err := rand.Read(salt); err != nil {
+		return "", fmt.Errorf("generate salt: %w", err)
+	}
+
+	key := argon2.IDKey([]byte(password), salt, argonTime, argonMemory, argonThreads, argonKeyLen)
+
+	b64Salt := base64.RawStdEncoding.EncodeToString(salt)
+	b64Key := base64.RawStdEncoding.EncodeToString(key)
+	return fmt.Sprintf("argon2id$v=19$m=%d,t=%d,p=%d$%s$%s",
+		argonMemory, argonTime, argonThreads, b64Salt, b64Key), nil
+}
+
+// VerifyPassword checks password against an encoded hash produced by
+// HashPassword. It returns an error only on malformed input; a wrong
+// password is reported via the bool return.
+func VerifyPassword(password, encoded string) (bool, error) {
+	parts := strings.Split(encoded, "$")
+	if len(parts) != 5 || parts[0] != "argon2id" {
+		return false, errors.New("unrecognized hash format")
+	}
+
+	var memory, time uint32
+	var threads uint8
+	if _, err := fmt.Sscanf(parts[2], "m=%d,t=%d,p=%d", &memory, &time, &threads); err != nil {
+		return false, fmt.Errorf("parse hash params: %w", err)
+	}
+
+	salt, err := base64.RawStdEncoding.DecodeString(parts[3])
+	if err != nil {
+		return false, fmt.Errorf("decode salt: %w", err)
+	}
+	wantKey, err := base64.RawStdEncoding.DecodeString(parts[4])
+	if err != nil {
+		return false, fmt.Errorf("decode key: %w", err)
+	}
+
+	gotKey := argon2.IDKey([]byte(password), salt, time, memory, threads, uint32(len(wantKey)))
+	return subtle.ConstantTimeCompare(gotKey, wantKey) == 1, nil
+}

internal/auth/password_test.go

@@ -0,0 +1,51 @@
+package auth
+
+import "testing"
+
+func TestHashAndVerifyPassword(t *testing.T) {
+	hash, err := HashPassword("correct horse battery staple")
+	if err != nil {
+		t.Fatalf("HashPassword: %v", err)
+	}
+
+	ok, err := VerifyPassword("correct horse battery staple", hash)
+	if err != nil {
+		t.Fatalf("VerifyPassword: %v", err)
+	}
+	if !ok {
+		t.Error("VerifyPassword returned false for the correct password")
+	}
+
+	ok, err = VerifyPassword("wrong password", hash)
+	if err != nil {
+		t.Fatalf("VerifyPassword: %v", err)
+	}
+	if ok {
+		t.Error("VerifyPassword returned true for an incorrect password")
+	}
+}
+
+func TestVerifyPasswordMalformedHash(t *testing.T) {
+	if _, err := VerifyPassword("anything", "not-a-valid-hash"); err == nil {
+		t.Error("expected an error for a malformed hash, got nil")
+	}
+}
+
+func TestNewSessionTokenIsUnpredictableAndHashVerifiable(t *testing.T) {
+	token1, hash1, err := NewSessionToken()
+	if err != nil {
+		t.Fatalf("NewSessionToken: %v", err)
+	}
+	token2, _, err := NewSessionToken()
+	if err != nil {
+		t.Fatalf("NewSessionToken: %v", err)
+	}
+	if token1 == token2 {
+		t.Error("two calls to NewSessionToken produced the same token")
+	}
+
+	gotHash := HashSessionToken(token1)
+	if string(gotHash) != string(hash1) {
+		t.Error("HashSessionToken(token) does not match the hash returned alongside it")
+	}
+}

internal/auth/session.go

@@ -0,0 +1,37 @@
+package auth
+
+import (
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/base64"
+	"fmt"
+)
+
+// SessionDuration controls how long a login stays valid without activity.
+// TouchSession bumps last_seen_at on each authenticated request, but
+// expires_at (set at login) is what actually gates access.
+const SessionDuration = 30 * 24 * 60 * 60 // 30 days, in seconds
+
+// tokenLen is deliberately large: this is the only secret standing between
+// an attacker and a full account take-over, so it gets more entropy than a
+// password would need.
+const tokenLen = 32
+
+// NewSessionToken returns a random token to hand to the client, and the hash
+// of it to store in the database. Only the hash is ever persisted, so a
+// leaked database dump doesn't also leak usable session tokens.
+func NewSessionToken() (token string, hash []byte, err error) {
+	raw := make([]byte, tokenLen)
+	if _, err := rand.Read(raw); err != nil {
+		return "", nil, fmt.Errorf("generate token: %w", err)
+	}
+	token = base64.RawURLEncoding.EncodeToString(raw)
+	return token, HashSessionToken(token), nil
+}
+
+// HashSessionToken hashes a token presented by a client so it can be looked
+// up against the stored hash.
+func HashSessionToken(token string) []byte {
+	sum := sha256.Sum256([]byte(token))
+	return sum[:]
+}

internal/db/db.go

@@ -1,6 +1,6 @@
 // Code generated by sqlc. DO NOT EDIT.
 // versions:
-//   sqlc v1.30.0
+//   sqlc v1.31.1
 
 package db
 

internal/db/models.go

@@ -1,29 +1,50 @@
 // Code generated by sqlc. DO NOT EDIT.
 // versions:
-//   sqlc v1.30.0
+//   sqlc v1.31.1
 
 package db
 
 import (
+	"github.com/google/uuid"
 	"github.com/jackc/pgx/v5/pgtype"
 )
 
 type Game struct {
-	ID          int64
+	ID          uuid.UUID
+	UserID      uuid.UUID
+	PlatformID  uuid.UUID
 	Name        string
-	PlatformID  int64
 	Score       int32
-	ReleaseYear pgtype.Date
+	ReleaseDate pgtype.Date
 	Finished    pgtype.Date
+	UpdatedAt   pgtype.Timestamptz
+	DeletedAt   pgtype.Timestamptz
+	ChangeSeq   int64
 }
 
 type Platform struct {
-	ID   int64
-	Name string
+	ID        uuid.UUID
+	UserID    uuid.UUID
+	Name      string
+	UpdatedAt pgtype.Timestamptz
+	DeletedAt pgtype.Timestamptz
+	ChangeSeq int64
+}
+
+type Session struct {
+	TokenHash  []byte
+	UserID     uuid.UUID
+	CreatedAt  pgtype.Timestamptz
+	ExpiresAt  pgtype.Timestamptz
+	LastSeenAt pgtype.Timestamptz
 }
 
 type User struct {
-	ID   int64
-	Name string
-	Bio  pgtype.Text
+	ID           uuid.UUID
+	Email        string
+	PasswordHash string
+	Name         string
+	Bio          pgtype.Text
+	CreatedAt    pgtype.Timestamptz
+	UpdatedAt    pgtype.Timestamptz
 }

internal/db/querier.go

@@ -1,27 +1,37 @@
 // Code generated by sqlc. DO NOT EDIT.
 // versions:
-//   sqlc v1.30.0
+//   sqlc v1.31.1
 
 package db
 
 import (
 	"context"
+
+	"github.com/google/uuid"
 )
 
 type Querier interface {
-	CreateGame(ctx context.Context, arg CreateGameParams) (Game, error)
-	CreatePlatform(ctx context.Context, name string) (Platform, error)
-	CreateUser(ctx context.Context, arg CreateUserParams) (User, error)
-	DeleteGame(ctx context.Context, id int64) error
-	DeletePlatform(ctx context.Context, id int64) error
-	DeleteUser(ctx context.Context, id int64) error
-	GetGame(ctx context.Context, id int64) (Game, error)
-	GetUser(ctx context.Context, id int64) (User, error)
-	ListGames(ctx context.Context) ([]Game, error)
-	ListPlatforms(ctx context.Context) ([]Platform, error)
-	ListUsers(ctx context.Context) ([]User, error)
-	UpdateGame(ctx context.Context, arg UpdateGameParams) (Game, error)
-	UpdatePlatform(ctx context.Context, arg UpdatePlatformParams) (Platform, error)
+	CreateGame(ctx context.Context, arg CreateGameParams) (CreateGameRow, error)
+	CreatePlatform(ctx context.Context, arg CreatePlatformParams) (CreatePlatformRow, error)
+	CreateSession(ctx context.Context, arg CreateSessionParams) error
+	CreateUser(ctx context.Context, arg CreateUserParams) (CreateUserRow, error)
+	DeleteGame(ctx context.Context, arg DeleteGameParams) (int64, error)
+	// Soft delete, so the FK on game.platform_id is never touched and never
+	// blocks this on its own; the NOT EXISTS guard is what stops a platform
+	// that still has active games from being deleted. Call GetPlatform first to
+	// tell "not found" apart from "blocked by games" when this affects 0 rows.
+	DeletePlatform(ctx context.Context, arg DeletePlatformParams) (int64, error)
+	DeleteSession(ctx context.Context, tokenHash []byte) error
+	GetGame(ctx context.Context, arg GetGameParams) (GetGameRow, error)
+	GetPlatform(ctx context.Context, arg GetPlatformParams) (GetPlatformRow, error)
+	GetSessionAndUser(ctx context.Context, tokenHash []byte) (GetSessionAndUserRow, error)
+	GetUserByEmail(ctx context.Context, email string) (GetUserByEmailRow, error)
+	GetUserByID(ctx context.Context, id uuid.UUID) (GetUserByIDRow, error)
+	ListGames(ctx context.Context, userID uuid.UUID) ([]ListGamesRow, error)
+	ListPlatforms(ctx context.Context, userID uuid.UUID) ([]ListPlatformsRow, error)
+	TouchSession(ctx context.Context, tokenHash []byte) error
+	UpdateGame(ctx context.Context, arg UpdateGameParams) (UpdateGameRow, error)
+	UpdatePlatform(ctx context.Context, arg UpdatePlatformParams) (UpdatePlatformRow, error)
 }
 
 var _ Querier = (*Queries)(nil)

internal/db/query.sql.go

@@ -1,6 +1,6 @@
 // Code generated by sqlc. DO NOT EDIT.
 // versions:
-//   sqlc v1.30.0
+//   sqlc v1.31.1
 // source: query.sql
 
 package db
@@ -8,41 +8,61 @@ package db
 import (
 	"context"
 
+	"github.com/google/uuid"
 	"github.com/jackc/pgx/v5/pgtype"
 )
 
 const createGame = `-- name: CreateGame :one
-INSERT INTO game (
-  name, platform_id, score, release_year, finished
-) VALUES (
-  $1, $2, $3, $4, $5
+WITH inserted AS (
+  INSERT INTO game (
+    user_id, platform_id, name, score, release_date, finished
+  ) VALUES (
+    $1, $2, $3, $4, $5, $6
+  )
+  RETURNING id, platform_id, name, score, release_date, finished
 )
-RETURNING id, name, platform_id, score, release_year, finished
+SELECT inserted.id, inserted.name, inserted.platform_id, platform.name AS platform_name,
+       inserted.score, inserted.release_date, inserted.finished
+FROM inserted
+JOIN platform ON platform.id = inserted.platform_id
 `
 
 type CreateGameParams struct {
+	UserID      uuid.UUID
+	PlatformID  uuid.UUID
 	Name        string
-	PlatformID  int64
 	Score       int32
-	ReleaseYear pgtype.Date
+	ReleaseDate pgtype.Date
 	Finished    pgtype.Date
 }
 
-func (q *Queries) CreateGame(ctx context.Context, arg CreateGameParams) (Game, error) {
+type CreateGameRow struct {
+	ID           uuid.UUID
+	Name         string
+	PlatformID   uuid.UUID
+	PlatformName string
+	Score        int32
+	ReleaseDate  pgtype.Date
+	Finished     pgtype.Date
+}
+
+func (q *Queries) CreateGame(ctx context.Context, arg CreateGameParams) (CreateGameRow, error) {
 	row := q.db.QueryRow(ctx, createGame,
-		arg.Name,
+		arg.UserID,
 		arg.PlatformID,
+		arg.Name,
 		arg.Score,
-		arg.ReleaseYear,
+		arg.ReleaseDate,
 		arg.Finished,
 	)
-	var i Game
+	var i CreateGameRow
 	err := row.Scan(
 		&i.ID,
 		&i.Name,
 		&i.PlatformID,
+		&i.PlatformName,
 		&i.Score,
-		&i.ReleaseYear,
+		&i.ReleaseDate,
 		&i.Finished,
 	)
 	return i, err
@@ -50,122 +70,327 @@ func (q *Queries) CreateGame(ctx context.Context, arg CreateGameParams) (Game, e
 
 const createPlatform = `-- name: CreatePlatform :one
 INSERT INTO platform (
-  name
+  user_id, name
 ) VALUES (
-  $1
+  $1, $2
 )
 RETURNING id, name
 `
 
-func (q *Queries) CreatePlatform(ctx context.Context, name string) (Platform, error) {
-	row := q.db.QueryRow(ctx, createPlatform, name)
-	var i Platform
+type CreatePlatformParams struct {
+	UserID uuid.UUID
+	Name   string
+}
+
+type CreatePlatformRow struct {
+	ID   uuid.UUID
+	Name string
+}
+
+func (q *Queries) CreatePlatform(ctx context.Context, arg CreatePlatformParams) (CreatePlatformRow, error) {
+	row := q.db.QueryRow(ctx, createPlatform, arg.UserID, arg.Name)
+	var i CreatePlatformRow
 	err := row.Scan(&i.ID, &i.Name)
 	return i, err
 }
 
+const createSession = `-- name: CreateSession :exec
+INSERT INTO sessions (
+  token_hash, user_id, expires_at
+) VALUES (
+  $1, $2, $3
+)
+`
+
+type CreateSessionParams struct {
+	TokenHash []byte
+	UserID    uuid.UUID
+	ExpiresAt pgtype.Timestamptz
+}
+
+func (q *Queries) CreateSession(ctx context.Context, arg CreateSessionParams) error {
+	_, err := q.db.Exec(ctx, createSession, arg.TokenHash, arg.UserID, arg.ExpiresAt)
+	return err
+}
+
 const createUser = `-- name: CreateUser :one
 INSERT INTO users (
-  name, bio
+  email, password_hash, name, bio
 ) VALUES (
-  $1, $2
+  $1, $2, $3, $4
 )
-RETURNING id, name, bio
+RETURNING id, email, name, bio, created_at
 `
 
 type CreateUserParams struct {
-	Name string
-	Bio  pgtype.Text
+	Email        string
+	PasswordHash string
+	Name         string
+	Bio          pgtype.Text
 }
 
-func (q *Queries) CreateUser(ctx context.Context, arg CreateUserParams) (User, error) {
-	row := q.db.QueryRow(ctx, createUser, arg.Name, arg.Bio)
-	var i User
-	err := row.Scan(&i.ID, &i.Name, &i.Bio)
+type CreateUserRow struct {
+	ID        uuid.UUID
+	Email     string
+	Name      string
+	Bio       pgtype.Text
+	CreatedAt pgtype.Timestamptz
+}
+
+func (q *Queries) CreateUser(ctx context.Context, arg CreateUserParams) (CreateUserRow, error) {
+	row := q.db.QueryRow(ctx, createUser,
+		arg.Email,
+		arg.PasswordHash,
+		arg.Name,
+		arg.Bio,
+	)
+	var i CreateUserRow
+	err := row.Scan(
+		&i.ID,
+		&i.Email,
+		&i.Name,
+		&i.Bio,
+		&i.CreatedAt,
+	)
 	return i, err
 }
 
-const deleteGame = `-- name: DeleteGame :exec
-DELETE FROM game
-WHERE id = $1
+const deleteGame = `-- name: DeleteGame :execrows
+UPDATE game
+SET deleted_at = now()
+WHERE id = $1 AND user_id = $2 AND deleted_at IS NULL
 `
 
-func (q *Queries) DeleteGame(ctx context.Context, id int64) error {
-	_, err := q.db.Exec(ctx, deleteGame, id)
-	return err
+type DeleteGameParams struct {
+	ID     uuid.UUID
+	UserID uuid.UUID
 }
 
-const deletePlatform = `-- name: DeletePlatform :exec
-DELETE FROM platform
-WHERE id = $1
-`
-
-func (q *Queries) DeletePlatform(ctx context.Context, id int64) error {
-	_, err := q.db.Exec(ctx, deletePlatform, id)
-	return err
+func (q *Queries) DeleteGame(ctx context.Context, arg DeleteGameParams) (int64, error) {
+	result, err := q.db.Exec(ctx, deleteGame, arg.ID, arg.UserID)
+	if err != nil {
+		return 0, err
+	}
+	return result.RowsAffected(), nil
 }
 
-const deleteUser = `-- name: DeleteUser :exec
-DELETE FROM users
-WHERE id = $1
+const deletePlatform = `-- name: DeletePlatform :execrows
+UPDATE platform
+SET deleted_at = now()
+WHERE platform.id = $1 AND platform.user_id = $2 AND platform.deleted_at IS NULL
+  AND NOT EXISTS (
+    SELECT 1 FROM game
+    WHERE game.platform_id = platform.id AND game.deleted_at IS NULL
+  )
 `
 
-func (q *Queries) DeleteUser(ctx context.Context, id int64) error {
-	_, err := q.db.Exec(ctx, deleteUser, id)
+type DeletePlatformParams struct {
+	ID     uuid.UUID
+	UserID uuid.UUID
+}
+
+// Soft delete, so the FK on game.platform_id is never touched and never
+// blocks this on its own; the NOT EXISTS guard is what stops a platform
+// that still has active games from being deleted. Call GetPlatform first to
+// tell "not found" apart from "blocked by games" when this affects 0 rows.
+func (q *Queries) DeletePlatform(ctx context.Context, arg DeletePlatformParams) (int64, error) {
+	result, err := q.db.Exec(ctx, deletePlatform, arg.ID, arg.UserID)
+	if err != nil {
+		return 0, err
+	}
+	return result.RowsAffected(), nil
+}
+
+const deleteSession = `-- name: DeleteSession :exec
+DELETE FROM sessions
+WHERE token_hash = $1
+`
+
+func (q *Queries) DeleteSession(ctx context.Context, tokenHash []byte) error {
+	_, err := q.db.Exec(ctx, deleteSession, tokenHash)
 	return err
 }
 
 const getGame = `-- name: GetGame :one
-SELECT id, name, platform_id, score, release_year, finished FROM game
-WHERE id = $1 LIMIT 1
+SELECT game.id, game.name, game.platform_id, platform.name AS platform_name,
+       game.score, game.release_date, game.finished
+FROM game
+JOIN platform ON platform.id = game.platform_id
+WHERE game.id = $1 AND game.user_id = $2 AND game.deleted_at IS NULL
 `
 
-func (q *Queries) GetGame(ctx context.Context, id int64) (Game, error) {
-	row := q.db.QueryRow(ctx, getGame, id)
-	var i Game
+type GetGameParams struct {
+	ID     uuid.UUID
+	UserID uuid.UUID
+}
+
+type GetGameRow struct {
+	ID           uuid.UUID
+	Name         string
+	PlatformID   uuid.UUID
+	PlatformName string
+	Score        int32
+	ReleaseDate  pgtype.Date
+	Finished     pgtype.Date
+}
+
+func (q *Queries) GetGame(ctx context.Context, arg GetGameParams) (GetGameRow, error) {
+	row := q.db.QueryRow(ctx, getGame, arg.ID, arg.UserID)
+	var i GetGameRow
 	err := row.Scan(
 		&i.ID,
 		&i.Name,
 		&i.PlatformID,
+		&i.PlatformName,
 		&i.Score,
-		&i.ReleaseYear,
+		&i.ReleaseDate,
 		&i.Finished,
 	)
 	return i, err
 }
 
-const getUser = `-- name: GetUser :one
-SELECT id, name, bio FROM users
-WHERE id = $1 LIMIT 1
+const getPlatform = `-- name: GetPlatform :one
+SELECT id, name
+FROM platform
+WHERE id = $1 AND user_id = $2 AND deleted_at IS NULL
 `
 
-func (q *Queries) GetUser(ctx context.Context, id int64) (User, error) {
-	row := q.db.QueryRow(ctx, getUser, id)
-	var i User
-	err := row.Scan(&i.ID, &i.Name, &i.Bio)
+type GetPlatformParams struct {
+	ID     uuid.UUID
+	UserID uuid.UUID
+}
+
+type GetPlatformRow struct {
+	ID   uuid.UUID
+	Name string
+}
+
+func (q *Queries) GetPlatform(ctx context.Context, arg GetPlatformParams) (GetPlatformRow, error) {
+	row := q.db.QueryRow(ctx, getPlatform, arg.ID, arg.UserID)
+	var i GetPlatformRow
+	err := row.Scan(&i.ID, &i.Name)
+	return i, err
+}
+
+const getSessionAndUser = `-- name: GetSessionAndUser :one
+SELECT users.id, users.email, users.name, users.bio, sessions.expires_at
+FROM sessions
+JOIN users ON users.id = sessions.user_id
+WHERE sessions.token_hash = $1 AND sessions.expires_at > now()
+`
+
+type GetSessionAndUserRow struct {
+	ID        uuid.UUID
+	Email     string
+	Name      string
+	Bio       pgtype.Text
+	ExpiresAt pgtype.Timestamptz
+}
+
+func (q *Queries) GetSessionAndUser(ctx context.Context, tokenHash []byte) (GetSessionAndUserRow, error) {
+	row := q.db.QueryRow(ctx, getSessionAndUser, tokenHash)
+	var i GetSessionAndUserRow
+	err := row.Scan(
+		&i.ID,
+		&i.Email,
+		&i.Name,
+		&i.Bio,
+		&i.ExpiresAt,
+	)
+	return i, err
+}
+
+const getUserByEmail = `-- name: GetUserByEmail :one
+SELECT id, email, password_hash, name, bio, created_at
+FROM users
+WHERE email = $1
+`
+
+type GetUserByEmailRow struct {
+	ID           uuid.UUID
+	Email        string
+	PasswordHash string
+	Name         string
+	Bio          pgtype.Text
+	CreatedAt    pgtype.Timestamptz
+}
+
+func (q *Queries) GetUserByEmail(ctx context.Context, email string) (GetUserByEmailRow, error) {
+	row := q.db.QueryRow(ctx, getUserByEmail, email)
+	var i GetUserByEmailRow
+	err := row.Scan(
+		&i.ID,
+		&i.Email,
+		&i.PasswordHash,
+		&i.Name,
+		&i.Bio,
+		&i.CreatedAt,
+	)
+	return i, err
+}
+
+const getUserByID = `-- name: GetUserByID :one
+SELECT id, email, name, bio, created_at
+FROM users
+WHERE id = $1
+`
+
+type GetUserByIDRow struct {
+	ID        uuid.UUID
+	Email     string
+	Name      string
+	Bio       pgtype.Text
+	CreatedAt pgtype.Timestamptz
+}
+
+func (q *Queries) GetUserByID(ctx context.Context, id uuid.UUID) (GetUserByIDRow, error) {
+	row := q.db.QueryRow(ctx, getUserByID, id)
+	var i GetUserByIDRow
+	err := row.Scan(
+		&i.ID,
+		&i.Email,
+		&i.Name,
+		&i.Bio,
+		&i.CreatedAt,
+	)
 	return i, err
 }
 
 const listGames = `-- name: ListGames :many
-SELECT id, name, platform_id, score, release_year, finished FROM game
-ORDER BY name
+SELECT game.id, game.name, game.platform_id, platform.name AS platform_name,
+       game.score, game.release_date, game.finished
+FROM game
+JOIN platform ON platform.id = game.platform_id
+WHERE game.user_id = $1 AND game.deleted_at IS NULL
+ORDER BY game.name
 `
 
-func (q *Queries) ListGames(ctx context.Context) ([]Game, error) {
-	rows, err := q.db.Query(ctx, listGames)
+type ListGamesRow struct {
+	ID           uuid.UUID
+	Name         string
+	PlatformID   uuid.UUID
+	PlatformName string
+	Score        int32
+	ReleaseDate  pgtype.Date
+	Finished     pgtype.Date
+}
+
+func (q *Queries) ListGames(ctx context.Context, userID uuid.UUID) ([]ListGamesRow, error) {
+	rows, err := q.db.Query(ctx, listGames, userID)
 	if err != nil {
 		return nil, err
 	}
 	defer rows.Close()
-	var items []Game
+	var items []ListGamesRow
 	for rows.Next() {
-		var i Game
+		var i ListGamesRow
 		if err := rows.Scan(
 			&i.ID,
 			&i.Name,
 			&i.PlatformID,
+			&i.PlatformName,
 			&i.Score,
-			&i.ReleaseYear,
+			&i.ReleaseDate,
 			&i.Finished,
 		); err != nil {
 			return nil, err
@@ -179,19 +404,26 @@ func (q *Queries) ListGames(ctx context.Context) ([]Game, error) {
 }
 
 const listPlatforms = `-- name: ListPlatforms :many
-SELECT id, name FROM platform
+SELECT id, name
+FROM platform
+WHERE user_id = $1 AND deleted_at IS NULL
 ORDER BY name
 `
 
-func (q *Queries) ListPlatforms(ctx context.Context) ([]Platform, error) {
-	rows, err := q.db.Query(ctx, listPlatforms)
+type ListPlatformsRow struct {
+	ID   uuid.UUID
+	Name string
+}
+
+func (q *Queries) ListPlatforms(ctx context.Context, userID uuid.UUID) ([]ListPlatformsRow, error) {
+	rows, err := q.db.Query(ctx, listPlatforms, userID)
 	if err != nil {
 		return nil, err
 	}
 	defer rows.Close()
-	var items []Platform
+	var items []ListPlatformsRow
 	for rows.Next() {
-		var i Platform
+		var i ListPlatformsRow
 		if err := rows.Scan(&i.ID, &i.Name); err != nil {
 			return nil, err
 		}
@@ -203,63 +435,68 @@ func (q *Queries) ListPlatforms(ctx context.Context) ([]Platform, error) {
 	return items, nil
 }
 
-const listUsers = `-- name: ListUsers :many
-SELECT id, name, bio FROM users
-ORDER BY name
+const touchSession = `-- name: TouchSession :exec
+UPDATE sessions
+SET last_seen_at = now()
+WHERE token_hash = $1
 `
 
-func (q *Queries) ListUsers(ctx context.Context) ([]User, error) {
-	rows, err := q.db.Query(ctx, listUsers)
-	if err != nil {
-		return nil, err
-	}
-	defer rows.Close()
-	var items []User
-	for rows.Next() {
-		var i User
-		if err := rows.Scan(&i.ID, &i.Name, &i.Bio); err != nil {
-			return nil, err
-		}
-		items = append(items, i)
-	}
-	if err := rows.Err(); err != nil {
-		return nil, err
-	}
-	return items, nil
+func (q *Queries) TouchSession(ctx context.Context, tokenHash []byte) error {
+	_, err := q.db.Exec(ctx, touchSession, tokenHash)
+	return err
 }
 
 const updateGame = `-- name: UpdateGame :one
-UPDATE game
-SET name = $2, platform_id = $3, score = $4, release_year = $5, finished = $6
-WHERE id = $1
-RETURNING id, name, platform_id, score, release_year, finished
+WITH updated AS (
+  UPDATE game
+  SET platform_id = $3, name = $4, score = $5, release_date = $6, finished = $7
+  WHERE game.id = $1 AND game.user_id = $2 AND game.deleted_at IS NULL
+  RETURNING id, platform_id, name, score, release_date, finished
+)
+SELECT updated.id, updated.name, updated.platform_id, platform.name AS platform_name,
+       updated.score, updated.release_date, updated.finished
+FROM updated
+JOIN platform ON platform.id = updated.platform_id
 `
 
 type UpdateGameParams struct {
-	ID          int64
+	ID          uuid.UUID
+	UserID      uuid.UUID
+	PlatformID  uuid.UUID
 	Name        string
-	PlatformID  int64
 	Score       int32
-	ReleaseYear pgtype.Date
+	ReleaseDate pgtype.Date
 	Finished    pgtype.Date
 }
 
-func (q *Queries) UpdateGame(ctx context.Context, arg UpdateGameParams) (Game, error) {
+type UpdateGameRow struct {
+	ID           uuid.UUID
+	Name         string
+	PlatformID   uuid.UUID
+	PlatformName string
+	Score        int32
+	ReleaseDate  pgtype.Date
+	Finished     pgtype.Date
+}
+
+func (q *Queries) UpdateGame(ctx context.Context, arg UpdateGameParams) (UpdateGameRow, error) {
 	row := q.db.QueryRow(ctx, updateGame,
 		arg.ID,
-		arg.Name,
+		arg.UserID,
 		arg.PlatformID,
+		arg.Name,
 		arg.Score,
-		arg.ReleaseYear,
+		arg.ReleaseDate,
 		arg.Finished,
 	)
-	var i Game
+	var i UpdateGameRow
 	err := row.Scan(
 		&i.ID,
 		&i.Name,
 		&i.PlatformID,
+		&i.PlatformName,
 		&i.Score,
-		&i.ReleaseYear,
+		&i.ReleaseDate,
 		&i.Finished,
 	)
 	return i, err
@@ -267,19 +504,25 @@ func (q *Queries) UpdateGame(ctx context.Context, arg UpdateGameParams) (Game, e
 
 const updatePlatform = `-- name: UpdatePlatform :one
 UPDATE platform
-SET name = $2
-WHERE id = $1
+SET name = $3
+WHERE id = $1 AND user_id = $2 AND deleted_at IS NULL
 RETURNING id, name
 `
 
 type UpdatePlatformParams struct {
-	ID   int64
+	ID     uuid.UUID
+	UserID uuid.UUID
+	Name   string
+}
+
+type UpdatePlatformRow struct {
+	ID   uuid.UUID
 	Name string
 }
 
-func (q *Queries) UpdatePlatform(ctx context.Context, arg UpdatePlatformParams) (Platform, error) {
-	row := q.db.QueryRow(ctx, updatePlatform, arg.ID, arg.Name)
-	var i Platform
+func (q *Queries) UpdatePlatform(ctx context.Context, arg UpdatePlatformParams) (UpdatePlatformRow, error) {
+	row := q.db.QueryRow(ctx, updatePlatform, arg.ID, arg.UserID, arg.Name)
+	var i UpdatePlatformRow
 	err := row.Scan(&i.ID, &i.Name)
 	return i, err
 }

internal/model/model.go

@@ -0,0 +1,58 @@
+// Package model holds the plain data types shared between the API and its
+// clients. It has no dependency on Huma, Echo or the database, so clients
+// can import it without pulling in the server.
+package model
+
+// User is the public view of an account; it never carries the password hash.
+type User struct {
+	ID    string `json:"id"`
+	Email string `json:"email"`
+	Name  string `json:"name"`
+	Bio   string `json:"bio,omitempty"`
+}
+
+type RegisterInput struct {
+	Email    string `json:"email" format:"email"`
+	Password string `json:"password" minLength:"8"`
+	Name     string `json:"name" minLength:"1"`
+}
+
+type LoginInput struct {
+	Email    string `json:"email" format:"email"`
+	Password string `json:"password"`
+}
+
+// AuthResponse is returned by register and login. Token is also set as an
+// httpOnly cookie, but is included in the body so non-browser clients (the
+// TUI, the Fyne GUI) can store and send it themselves.
+type AuthResponse struct {
+	Token string `json:"token"`
+	User  User   `json:"user"`
+}
+
+type Platform struct {
+	ID   string `json:"id"`
+	Name string `json:"name"`
+}
+
+type PlatformInput struct {
+	Name string `json:"name" minLength:"1" doc:"Name of the platform"`
+}
+
+type Game struct {
+	ID           string `json:"id"`
+	Name         string `json:"name"`
+	PlatformID   string `json:"platform_id"`
+	PlatformName string `json:"platform_name"`
+	Score        int32  `json:"score"`
+	ReleaseDate  string `json:"release_date" format:"date" doc:"YYYY-MM-DD"`
+	Finished     string `json:"finished,omitempty" format:"date" doc:"YYYY-MM-DD (optional)"`
+}
+
+type GameInput struct {
+	Name        string `json:"name" minLength:"1"`
+	PlatformID  string `json:"platform_id"`
+	Score       int32  `json:"score" minimum:"0" maximum:"100"`
+	ReleaseDate string `json:"release_date" format:"date" doc:"YYYY-MM-DD"`
+	Finished    string `json:"finished,omitempty" format:"date" doc:"YYYY-MM-DD (optional)"`
+}