Fix UI visibility, form CSS, and quick-connect modal

- Fix drawer/modal backdrop class names and is-visible transitions
- Add protocol tab, settings tab, and command palette CSS
- Add form-section-content as CSS alias for form-section-body
- Add missing form CSS: form-hint, form-toggle, jump-host-row, preset-row
- Add btn-outline, form-input-sm, form-select-sm styles
- Replace window.prompt() with custom modal for WKWebView compatibility
- Remove diagnostic banner and instrumentation

frontend/src/css/components.css

@@ -132,6 +132,18 @@
 .btn-group {
     display: inline-flex;
 }
+
+/* Outline button — transparent background, subtle border */
+.btn-outline {
+    background: transparent;
+    border: 1px solid var(--border);
+    color: var(--text-secondary);
+}
+.btn-outline:hover {
+    background: var(--surface-2);
+    color: var(--text-primary);
+}
+
 .btn-group .btn {
     border-radius: 0;
 }

frontend/src/css/forms.css

@@ -97,12 +97,14 @@
     color: var(--text-tertiary);
 }
 
-.form-section-body {
+.form-section-body,
+.form-section-content {
     padding: var(--space-4);
     display: none;
 }
 
-.form-section.is-open .form-section-body {
+.form-section.is-open .form-section-body,
+.form-section.is-open .form-section-content {
     display: block;
 }
 
@@ -437,3 +439,76 @@
     color: var(--text-tertiary);
     flex: 1;
 }
+
+/* -----------------------------------------------------------------------
+   Form hint — inline help text below fields
+   ----------------------------------------------------------------------- */
+.form-hint {
+    font-size: var(--text-xs);
+    color: var(--text-tertiary);
+    margin-top: var(--space-1);
+    line-height: var(--leading-relaxed);
+}
+
+.form-hint.secret-error {
+    color: var(--danger);
+}
+
+/* -----------------------------------------------------------------------
+   Toggle wrapper — label + toggle switch in a row
+   ----------------------------------------------------------------------- */
+.form-toggle-wrapper {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: var(--space-3);
+    padding: var(--space-1) 0;
+}
+
+.form-toggle-label {
+    font-size: var(--text-sm);
+    color: var(--text-secondary);
+    flex: 1;
+}
+
+/* -----------------------------------------------------------------------
+   Jump host rows
+   ----------------------------------------------------------------------- */
+.jump-hosts-list {
+    display: flex;
+    flex-direction: column;
+    gap: var(--space-2);
+}
+
+.jump-host-row {
+    display: grid;
+    grid-template-columns: 1fr 80px 1fr auto;
+    gap: var(--space-2);
+    align-items: center;
+}
+
+/* -----------------------------------------------------------------------
+   Payload preset rows
+   ----------------------------------------------------------------------- */
+.payload-presets-list {
+    display: flex;
+    flex-direction: column;
+    gap: var(--space-2);
+}
+
+.preset-row {
+    display: grid;
+    grid-template-columns: 120px 1fr 100px auto;
+    gap: var(--space-2);
+    align-items: center;
+}
+
+/* -----------------------------------------------------------------------
+   Small / compact form controls — used inside repeater rows
+   ----------------------------------------------------------------------- */
+.form-input-sm,
+.form-select-sm {
+    font-size: var(--text-xs);
+    padding: var(--space-1) var(--space-2);
+    height: 30px;
+}

frontend/src/css/modals.css

@@ -233,6 +233,183 @@
     flex-shrink: 0;
 }
 
+/* Protocol selector tabs inside the drawer */
+.drawer-protocol-tabs {
+    display: flex;
+    gap: 0;
+    padding: 0 var(--space-5);
+    border-bottom: 1px solid var(--border-subtle);
+    flex-shrink: 0;
+}
+
+.drawer-proto-tab {
+    position: relative;
+    padding: var(--space-2) var(--space-4);
+    background: none;
+    border: none;
+    color: var(--text-secondary);
+    font-size: var(--text-sm);
+    font-weight: var(--weight-medium);
+    cursor: pointer;
+    letter-spacing: 0.04em;
+    transition: color var(--transition-fast);
+}
+
+.drawer-proto-tab:hover {
+    color: var(--text-primary);
+}
+
+.drawer-proto-tab.active {
+    color: var(--accent);
+}
+
+.drawer-proto-tab.active::after {
+    content: '';
+    position: absolute;
+    bottom: -1px;
+    left: var(--space-2);
+    right: var(--space-2);
+    height: 2px;
+    background: var(--accent);
+    border-radius: 1px;
+}
+
+/* Settings tab bar */
+.settings-tab-bar {
+    display: flex;
+    gap: 0;
+    padding: 0 var(--space-5);
+    border-bottom: 1px solid var(--border-subtle);
+    flex-shrink: 0;
+}
+
+.settings-tab {
+    position: relative;
+    padding: var(--space-2) var(--space-3);
+    background: none;
+    border: none;
+    color: var(--text-secondary);
+    font-size: var(--text-sm);
+    font-weight: var(--weight-medium);
+    cursor: pointer;
+    transition: color var(--transition-fast);
+}
+
+.settings-tab:hover {
+    color: var(--text-primary);
+}
+
+.settings-tab.active {
+    color: var(--accent);
+}
+
+.settings-tab.active::after {
+    content: '';
+    position: absolute;
+    bottom: -1px;
+    left: var(--space-1);
+    right: var(--space-1);
+    height: 2px;
+    background: var(--accent);
+    border-radius: 1px;
+}
+
+.settings-body {
+    padding: var(--space-5);
+}
+
+/* Command palette */
+.palette-overlay {
+    position: fixed;
+    inset: 0;
+    z-index: var(--z-modal-backdrop);
+    background: rgba(10, 10, 20, 0.50);
+    display: flex;
+    align-items: flex-start;
+    justify-content: center;
+    padding-top: 20vh;
+}
+
+.palette {
+    width: 520px;
+    max-width: calc(100vw - var(--space-8));
+    max-height: 400px;
+    display: flex;
+    flex-direction: column;
+    background: var(--bg-elevated);
+    border: 1px solid var(--border-default);
+    border-radius: var(--radius-xl);
+    box-shadow: var(--shadow-xl);
+    overflow: hidden;
+}
+
+.palette-input {
+    width: 100%;
+    padding: var(--space-3) var(--space-4);
+    background: transparent;
+    border: none;
+    border-bottom: 1px solid var(--border-subtle);
+    color: var(--text-primary);
+    font-size: var(--text-base);
+    outline: none;
+}
+
+.palette-list {
+    flex: 1;
+    overflow-y: auto;
+    padding: var(--space-1) 0;
+}
+
+.palette-item {
+    display: flex;
+    align-items: center;
+    gap: var(--space-3);
+    padding: var(--space-2) var(--space-4);
+    cursor: pointer;
+    transition: background var(--transition-fast);
+}
+
+.palette-item:hover,
+.palette-item-active {
+    background: var(--bg-hover);
+}
+
+.palette-item-label {
+    flex: 1;
+    font-size: var(--text-sm);
+    color: var(--text-primary);
+}
+
+.palette-item-detail {
+    font-size: var(--text-xs);
+    color: var(--text-tertiary);
+}
+
+.palette-item-shortcut {
+    font-size: var(--text-xs);
+    color: var(--text-tertiary);
+    background: var(--bg-surface);
+    padding: var(--space-half) var(--space-1);
+    border-radius: var(--radius-sm);
+    font-family: var(--font-mono);
+}
+
+.palette-section {
+    padding: var(--space-1) var(--space-4);
+    font-size: var(--text-xs);
+    font-weight: var(--weight-semibold);
+    color: var(--text-tertiary);
+    text-transform: uppercase;
+    letter-spacing: 0.06em;
+}
+
+.palette-empty {
+    padding: var(--space-6) var(--space-4);
+    text-align: center;
+    font-size: var(--text-sm);
+    color: var(--text-tertiary);
+}
+
 /* -----------------------------------------------------------------------
    Confirmation dialog
    ----------------------------------------------------------------------- */

frontend/src/js/app.js

@@ -335,7 +335,7 @@ class App {
      * Prompts the user for a host/port and opens a quick connection.
      */
     async quickConnect() {
-        const input = prompt('Quick connect (host[:port]):');
+        const input = await this._inputPrompt('Quick Connect', 'Enter host[:port]', 'e.g. 192.168.1.1:22');
         if (!input || !input.trim()) return;
 
         const parts = input.trim().split(':');
@@ -505,7 +505,69 @@ class App {
      */
     _bindClick(id, handler) {
         const el = document.getElementById(id);
-        if (el) el.addEventListener('click', handler);
+        if (el) {
+            el.addEventListener('click', (e) => {
+                try {
+                    handler(e);
+                } catch (err) {
+                    console.error('Click handler error for', id, err);
+                }
+            });
+        }
+    }
+
+    /**
+     * Shows a simple text-input prompt modal (replaces window.prompt which
+     * is unavailable in WKWebView).
+     * @param {string} title - Modal heading.
+     * @param {string} label - Label above the input.
+     * @param {string} [placeholder] - Placeholder text.
+     * @returns {Promise<string|null>} Resolves with the value or null if cancelled.
+     * @private
+     */
+    _inputPrompt(title, label, placeholder) {
+        const createElement = window.NexusTerminal.createElement;
+        return new Promise((resolve) => {
+            const backdrop = createElement('div', 'modal-backdrop');
+            const modal = createElement('div', 'modal modal-sm');
+            modal.innerHTML = `
+                <div class="modal-header">
+                    <h3 class="modal-title">${title}</h3>
+                    <button class="btn btn-icon btn-xs modal-close">&times;</button>
+                </div>
+                <div class="modal-body">
+                    <div class="form-group">
+                        <label class="form-label">${label}</label>
+                        <input class="form-input" type="text" placeholder="${placeholder || ''}" autofocus />
+                    </div>
+                </div>
+                <div class="modal-footer">
+                    <button class="btn btn-sm prompt-cancel">Cancel</button>
+                    <button class="btn btn-sm btn-primary prompt-ok">Connect</button>
+                </div>
+            `;
+            backdrop.appendChild(modal);
+            document.body.appendChild(backdrop);
+            requestAnimationFrame(() => backdrop.classList.add('is-visible'));
+
+            const input = modal.querySelector('input');
+            const close = (value) => {
+                backdrop.classList.remove('is-visible');
+                setTimeout(() => backdrop.remove(), 200);
+                resolve(value);
+            };
+
+            modal.querySelector('.modal-close').addEventListener('click', () => close(null));
+            modal.querySelector('.prompt-cancel').addEventListener('click', () => close(null));
+            modal.querySelector('.prompt-ok').addEventListener('click', () => close(input.value));
+            backdrop.addEventListener('click', (e) => { if (e.target === backdrop) close(null); });
+            input.addEventListener('keydown', (e) => {
+                if (e.key === 'Enter') close(input.value);
+                if (e.key === 'Escape') close(null);
+            });
+
+            setTimeout(() => input.focus(), 50);
+        });
     }
 }
 

frontend/src/js/profiles.js

@@ -107,7 +107,7 @@ class ProfileEditor {
     render(profile, isNew) {
         this.close();
 
-        const overlay = createElement('div', 'drawer-overlay');
+        const overlay = createElement('div', 'drawer-backdrop');
         const drawer = createElement('div', 'drawer');
 
         // ── Header ──────────────────────────────────────────────
@@ -183,6 +183,12 @@ class ProfileEditor {
         document.body.appendChild(overlay);
         this.drawer = overlay;
 
+        // Trigger visibility after append so CSS transitions animate
+        requestAnimationFrame(() => {
+            overlay.classList.add('is-visible');
+            drawer.classList.add('is-visible');
+        });
+
         // Prevent overlay click from reaching through the drawer
         drawer.addEventListener('click', (e) => e.stopPropagation());
 

frontend/src/js/secrets.js

@@ -29,7 +29,7 @@ class SecretPrompt {
         return new Promise((resolve, reject) => {
             this._close(); // dismiss any existing prompt
 
-            const overlay = createElement('div', 'modal-overlay');
+            const overlay = createElement('div', 'modal-backdrop');
             const modal = createElement('div', 'modal modal-secret');
 
             // Header
@@ -63,6 +63,11 @@ class SecretPrompt {
             document.body.appendChild(overlay);
             this._overlay = overlay;
 
+            requestAnimationFrame(() => {
+                overlay.classList.add('is-visible');
+                modal.classList.add('is-visible');
+            });
+
             const input = modal.querySelector('.secret-input');
             input.focus();
 
@@ -103,7 +108,7 @@ class SecretPrompt {
         return new Promise((resolve, reject) => {
             this._close();
 
-            const overlay = createElement('div', 'modal-overlay');
+            const overlay = createElement('div', 'modal-backdrop');
             const modal = createElement('div', 'modal modal-secret');
 
             const title = isNew ? 'Create Master Password' : 'Unlock Secret Store';
@@ -151,6 +156,11 @@ class SecretPrompt {
             document.body.appendChild(overlay);
             this._overlay = overlay;
 
+            requestAnimationFrame(() => {
+                overlay.classList.add('is-visible');
+                modal.classList.add('is-visible');
+            });
+
             const passInput = modal.querySelector('.master-password');
             const confirmInput = modal.querySelector('.master-confirm');
             const errorEl = modal.querySelector('.secret-error');
@@ -211,7 +221,7 @@ class SecretPrompt {
         return new Promise((resolve) => {
             this._close();
 
-            const overlay = createElement('div', 'modal-overlay');
+            const overlay = createElement('div', 'modal-backdrop');
             const modal = createElement('div', 'modal modal-secret modal-hostkey');
 
             const header = createElement('div', 'modal-header');

frontend/src/js/settings.js

@@ -86,7 +86,7 @@ class Settings {
     _render() {
         this.close();
 
-        const overlay = createElement('div', 'modal-overlay');
+        const overlay = createElement('div', 'modal-backdrop');
         const modal = createElement('div', 'modal modal-settings');
 
         // Header
@@ -136,6 +136,12 @@ class Settings {
         modal.addEventListener('click', (e) => e.stopPropagation());
         document.body.appendChild(overlay);
         this._overlay = overlay;
+
+        // Trigger visibility after append so CSS transitions animate
+        requestAnimationFrame(() => {
+            overlay.classList.add('is-visible');
+            modal.classList.add('is-visible');
+        });
     }
 
     /**