Make login/signup links responsive on mobile

templates/base.html

@@ -62,7 +62,7 @@
                        A2.25 2.25 0 006 21h7.5
                        a2.25 2.25 0 002.25-2.25V15m-3-3h10.5m0 0l-3-3m3 3l-3 3" />
                         </svg>
-                        Logout
+                        <span class="hidden sm:inline">Logout</span>
                     </a>
                     {% else %}
                     <!-- Show Login and Sign Up links -->
@@ -77,7 +77,7 @@
                        a2.25 2.25 0 002.25-2.25V15m-3-3h10.5
                        m0 0l-3-3m3 3l-3 3" />
                         </svg>
-                        Login
+                        <span class="hidden sm:inline">Login</span>
                     </a>
                     <a href="{{ url_for('auth.signup') }}"
                         class="text-slate-400 hover:text-slate-500 flex items-center gap-1">
@@ -89,7 +89,7 @@
                        -3.315-2.685-6-6-6H6c
                        -3.315 0-6 2.685-6 6m17.25-11.25h3m0 0v3m0-3l-3 0" />
                         </svg>
-                        Sign Up
+                        <span class="hidden sm:inline">Sign Up</span>
                     </a>
                     {% endif %}
                     <a href="https://github.com/GabePope/WorkoutTracker"