feat: Add CMD+K command palette with ninja-keys integration

Implement a command palette accessible via CMD+K/Ctrl+K using the ninja-keys
web component. Features include:

- New /api/cmd-k endpoint serving dynamic CV entries (experiences, projects, courses)
- Language-aware responses with 1-hour cache headers
- Scroll-to-section functionality for quick navigation
- Enhanced keyboard shortcuts modal with CMD+K documentation
- Comprehensive test coverage for API and UI interactions

Also includes cleanup of deprecated debug test files and various UI polish
improvements to contact form, themes, and action bar components.

static/css/03-components/_action-bar.css

@@ -477,6 +477,7 @@ iconify-icon {
     align-items: stretch;
     height: 100%;
     overflow: visible; /* Allow tooltips to extend beyond button container */
+    flex-wrap: nowrap; /* Keep buttons in single row */
 }
 
 .action-buttons-right {
@@ -484,6 +485,56 @@ iconify-icon {
     margin-left: auto;
 }
 
+/* ========================================
+   RESPONSIVE ACTION BUTTONS - Scale to fit
+   Prevents button overflow on narrow screens
+   ======================================== */
+
+/* Intermediate screens: shrink buttons to fit */
+@media (min-width: 901px) and (max-width: 1400px) {
+    .action-buttons-right {
+        flex-shrink: 1;
+        min-width: 0; /* Allow shrinking */
+    }
+
+    .action-buttons-right .action-btn {
+        flex-shrink: 1;
+        min-width: 40px; /* Minimum touchable size */
+        padding: 0 0.5rem; /* Reduce padding as needed */
+    }
+}
+
+/* Narrow desktop: icon-only buttons that scale */
+@media (min-width: 541px) and (max-width: 900px) {
+    .action-buttons-right {
+        display: flex !important; /* Show on tablet */
+        flex-shrink: 1;
+        min-width: 0;
+    }
+
+    .action-buttons-right .action-btn {
+        width: auto;
+        min-width: 36px;
+        padding: 0 0.4rem;
+        font-size: 0; /* Icon only */
+        flex-shrink: 1;
+    }
+
+    .action-buttons-right .action-btn iconify-icon {
+        width: 20px;
+        height: 20px;
+    }
+}
+
+/* Very narrow: use CSS clamp for fluid button sizing */
+@media (min-width: 901px) and (max-width: 1100px) {
+    .action-btn {
+        /* Fluid width that scales with viewport */
+        width: clamp(35px, 4vw, 50px) !important;
+        padding: 0 clamp(0.3rem, 0.8vw, 1rem) !important;
+    }
+}
+
 /* ============================================================================
    HTMX Loading Indicators
    ========================================================================= */