Add polished answer notifications (#1)

Sends a branded Resend email when a question receives its first answer, records accepted and failed sends, and adds collapsed answer editing with cancel behavior.

Co-authored-by: codegirl-007 <s.raide@gmail.com>

internal/store/user.go

@@ -30,6 +30,7 @@ type User struct {
 	Username     string
 	Name         string
 	Role         Role
+	Email        string
 	AvatarURL    string
 	State        string
 	CreatedAt    string
@@ -50,12 +51,13 @@ func NormalizeUsername(s string) string {
 	return strings.ToLower(strings.TrimSpace(s))
 }
 
-func toUser(db *sql.DB, id, username, name, role, avatarURL, state, createdAt, passwordHash string) *User {
+func toUser(db *sql.DB, id, username, name, role, email, avatarURL, state, createdAt, passwordHash string) *User {
 	return &User{
 		ID:           id,
 		Username:     username,
 		Name:         name,
 		Role:         Role(role),
+		Email:        email,
 		AvatarURL:    avatarURL,
 		State:        state,
 		CreatedAt:    createdAt,
@@ -73,6 +75,7 @@ func (u *User) Create(ctx context.Context) error {
 		return fmt.Errorf("invalid role")
 	}
 	u.Username = NormalizeUsername(u.Username)
+	u.Email = NormalizeEmail(u.Email)
 	if u.ID == "" {
 		u.ID = uuid.NewString()
 	}
@@ -88,6 +91,7 @@ func (u *User) Create(ctx context.Context) error {
 		Name:         u.Name,
 		PasswordHash: u.PasswordHash,
 		Role:         string(u.Role),
+		Email:        u.Email,
 		CreatedAt:    u.CreatedAt,
 	}))
 }
@@ -149,21 +153,27 @@ func (u *User) SetRole(ctx context.Context, role Role) error {
 	return nil
 }
 
-// SaveProfile writes State and optionally AvatarURL.
+// SaveProfile writes Email, State, and optionally AvatarURL.
 func (u *User) SaveProfile(ctx context.Context) error {
 	if u == nil || u.db == nil {
 		return fmt.Errorf("user: no database")
 	}
 	u.State = strings.TrimSpace(u.State)
+	u.Email = NormalizeEmail(u.Email)
 	q := sqlc.New(u.db)
 	if u.AvatarURL == "" {
-		return q.UpdateUserState(ctx, sqlc.UpdateUserStateParams{State: u.State, ID: u.ID})
+		return mapUniqueViolation(q.UpdateUserProfile(ctx, sqlc.UpdateUserProfileParams{
+			State: u.State,
+			Email: u.Email,
+			ID:    u.ID,
+		}))
 	}
-	return q.UpdateUserStateAndAvatar(ctx, sqlc.UpdateUserStateAndAvatarParams{
+	return mapUniqueViolation(q.UpdateUserProfileAndAvatar(ctx, sqlc.UpdateUserProfileAndAvatarParams{
 		State:     u.State,
+		Email:     u.Email,
 		AvatarUrl: u.AvatarURL,
 		ID:        u.ID,
-	})
+	}))
 }
 
 func CountAdmins(ctx context.Context, db *sql.DB) (int, error) {
@@ -187,7 +197,7 @@ func ListUsers(ctx context.Context, db *sql.DB, q ListUsersQuery) ([]User, strin
 	}
 	out := make([]User, 0, len(rows))
 	for _, r := range rows {
-		u := toUser(db, r.ID, r.Username, r.Name, r.Role, r.AvatarUrl, r.State, r.CreatedAt, "")
+		u := toUser(db, r.ID, r.Username, r.Name, r.Role, r.Email, r.AvatarUrl, r.State, r.CreatedAt, "")
 		out = append(out, *u)
 	}
 	var nextCreated, nextID string
@@ -204,7 +214,7 @@ func UserByID(ctx context.Context, db *sql.DB, id string) (*User, error) {
 	if err != nil {
 		return nil, err
 	}
-	return toUser(db, r.ID, r.Username, r.Name, r.Role, r.AvatarUrl, r.State, r.CreatedAt, ""), nil
+	return toUser(db, r.ID, r.Username, r.Name, r.Role, r.Email, r.AvatarUrl, r.State, r.CreatedAt, ""), nil
 }
 
 func UserByUsername(ctx context.Context, db *sql.DB, username string) (*User, error) {
@@ -212,5 +222,5 @@ func UserByUsername(ctx context.Context, db *sql.DB, username string) (*User, er
 	if err != nil {
 		return nil, err
 	}
-	return toUser(db, r.ID, r.Username, r.Name, r.Role, r.AvatarUrl, r.State, r.CreatedAt, r.PasswordHash), nil
+	return toUser(db, r.ID, r.Username, r.Name, r.Role, r.Email, r.AvatarUrl, r.State, r.CreatedAt, r.PasswordHash), nil
 }