Add password visibility toggle to login form

- Implement show/hide password functionality with eye icon toggle button
- Add dynamic input type switching between password and text
- Position toggle button inside password input field with proper styling
- Include hover, focus states and accessibility features (tabindex, title)
- Use FontAwesome eye/eye-slash icons for visual feedback
- Maintain secure default (password hidden) with optional visibility
- Integrate proper tab order with existing form elements

🤖 Generated with [Claude Code](https://claude.ai/code)

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

frontend/src/components/login.rs

@@ -24,6 +24,9 @@ pub fn Login(props: &LoginProps) -> Html {
     let remember_server = use_state(|| true);
     let remember_username = use_state(|| true);
     
+    // Password visibility toggle
+    let show_password = use_state(|| false);
+
     let server_url_ref = use_node_ref();
     let username_ref = use_node_ref();
     let password_ref = use_node_ref();
@@ -98,6 +101,13 @@ pub fn Login(props: &LoginProps) -> Html {
         })
     };
     
+    let on_toggle_password_visibility = {
+        let show_password = show_password.clone();
+        Callback::from(move |_| {
+            show_password.set(!*show_password);
+        })
+    };
+
     let on_submit = {
         let server_url = server_url.clone();
         let username = username.clone();
@@ -242,16 +252,27 @@ pub fn Login(props: &LoginProps) -> Html {
 
                     <div class="form-group">
                         <label for="password">{"Password"}</label>
-                        <input
-                            ref={password_ref}
-                            type="password"
-                            id="password"
-                            placeholder="Enter your password"
-                            value={(*password).clone()}
-                            onchange={on_password_change}
-                            disabled={*is_loading}
-                            tabindex="3"
-                        />
+                        <div class="password-input-container">
+                            <input
+                                ref={password_ref}
+                                type={if *show_password { "text" } else { "password" }}
+                                id="password"
+                                placeholder="Enter your password"
+                                value={(*password).clone()}
+                                onchange={on_password_change}
+                                disabled={*is_loading}
+                                tabindex="3"
+                            />
+                            <button
+                                type="button"
+                                class="password-toggle-btn"
+                                onclick={on_toggle_password_visibility}
+                                tabindex="6"
+                                title={if *show_password { "Hide password" } else { "Show password" }}
+                            >
+                                <i class={if *show_password { "fas fa-eye-slash" } else { "fas fa-eye" }}></i>
+                            </button>
+                        </div>
                     </div>
 
                     {

frontend/styles.css

@@ -534,6 +534,41 @@ body {
     font-weight: 400;
 }
 
+.password-input-container {
+    position: relative;
+    display: flex;
+    align-items: center;
+}
+
+.password-input-container input {
+    padding-right: 3rem !important;
+}
+
+.password-toggle-btn {
+    position: absolute;
+    right: 0.75rem;
+    background: transparent;
+    border: none;
+    color: #888;
+    cursor: pointer;
+    padding: 0.25rem;
+    font-size: 1rem;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    transition: color 0.2s ease;
+    z-index: 1;
+}
+
+.password-toggle-btn:hover {
+    color: #555;
+}
+
+.password-toggle-btn:focus {
+    outline: none;
+    color: #667eea;
+}
+
 .login-button, .register-button {
     width: 100%;
     padding: var(--control-padding);