chore: more rabbit comments

internal/controller/context_controller.go

@@ -1,6 +1,8 @@
 package controller
 
 import (
+	"errors"
+
 	"github.com/tinyauthapp/tinyauth/internal/model"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
 	"go.uber.org/dig"
@@ -109,7 +111,9 @@ func (controller *ContextController) userContextHandler(c *gin.Context) {
 	context, err := new(model.UserContext).NewFromGin(c)
 
 	if err != nil {
-		controller.log.App.Error().Err(err).Msg("Failed to create user context from request")
+		if !errors.Is(err, model.ErrUserContextNotFound) {
+			controller.log.App.Error().Err(err).Msg("Failed to create user context from request")
+		}
 		c.JSON(200, UserContextResponse{
 			Status:  401,
 			Message: "Unauthorized",

internal/controller/oauth_controller.go

@@ -335,7 +335,17 @@ func (controller *OAuthController) isRedirectSafe(redirectURI string) bool {
 		return false
 	}
 
-	if u.Port() != au.Port() {
+	getEffectivePort := func(u *url.URL) string {
+		if u.Port() != "" {
+			return u.Port()
+		}
+		if u.Scheme == "https" {
+			return "443"
+		}
+		return "80"
+	}
+
+	if getEffectivePort(u) != getEffectivePort(au) {
 		controller.log.App.Warn().Msg("Redirect URI port does not match app URL port")
 		return false
 	}

internal/controller/user_controller.go

@@ -295,6 +295,14 @@ func (controller *UserController) totpHandler(c *gin.Context) {
 	context, err := new(model.UserContext).NewFromGin(c)
 
 	if err != nil {
+		if errors.Is(err, model.ErrUserContextNotFound) {
+			controller.log.App.Warn().Msg("TOTP verification attempt without user context")
+			c.JSON(401, gin.H{
+				"status":  401,
+				"message": "Unauthorized",
+			})
+			return
+		}
 		controller.log.App.Error().Err(err).Msg("Failed to create user context from request for TOTP verification")
 		c.JSON(500, gin.H{
 			"status":  500,
@@ -405,6 +413,14 @@ func (controller *UserController) tailscaleHandler(c *gin.Context) {
 	context, err := new(model.UserContext).NewFromGin(c)
 
 	if err != nil {
+		if errors.Is(err, model.ErrUserContextNotFound) {
+			controller.log.App.Warn().Msg("Tailscale login attempt without user context")
+			c.JSON(401, gin.H{
+				"status":  401,
+				"message": "Unauthorized",
+			})
+			return
+		}
 		controller.log.App.Error().Err(err).Msg("Failed to create user context from request")
 		c.JSON(401, gin.H{
 			"status":  401,