Add mobile UX improvements: drop zone, pagination, and accessibility fixes

- Add drop zone file upload to Reconcile Reimbursements modal with consistent
  PDF/image icons across all upload areas
- Fix modal focus to prioritize date inputs over text inputs for better form UX
- Create pagination dynamically when first expense is added to empty table
- Add keyboard and checkbox event listeners to dynamically created expense rows
- Expose updateBulkActionButtons globally for ES module access
- Improve mobile navigation, button styles, and form responsiveness

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

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: JavaDogWebDesign

app/assets/css/components/buttons.css

@@ -123,34 +123,102 @@
     background-color: var(--border-color);
 }
 
+/* Disabled button styles */
+.btn:disabled,
+.btn[disabled] {
+    opacity: 0.5;
+    cursor: not-allowed;
+    pointer-events: none;
+    transform: none;
+    box-shadow: none;
+}
+
+.btn-primary:disabled,
+.btn-primary[disabled] {
+    background: var(--bg-secondary);
+    color: var(--text-muted);
+    border-color: var(--border-color);
+}
+
+.btn-secondary:disabled,
+.btn-secondary[disabled] {
+    background-color: var(--bg-secondary);
+    color: var(--text-muted);
+    border-color: var(--border-color);
+}
+
+.btn-danger:disabled,
+.btn-danger[disabled] {
+    background-color: var(--bg-secondary);
+    color: var(--text-muted);
+    border-color: var(--border-color);
+}
+
+.btn-success:disabled,
+.btn-success[disabled] {
+    background-color: var(--bg-secondary);
+    color: var(--text-muted);
+    border-color: var(--border-color);
+}
+
 /* Button icons - consistent spacing */
 .btn svg {
     margin-right: 0.5rem;
     vertical-align: middle;
 }
 
 /* ===== Mobile FAB Button ===== */
+.mobile-add-receipt-fab {
+    display: none;
+    position: fixed;
+    bottom: calc(24px + env(safe-area-inset-bottom, 0px));
+    right: 20px;
+    width: 60px;
+    height: 60px;
+    border-radius: 50%;
+    background: var(--gradient-hsa);
+    color: white;
+    border: none;
+    cursor: pointer;
+    z-index: 1500;
+    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+    align-items: center;
+    justify-content: center;
+    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
+    -webkit-tap-highlight-color: transparent;
+}
+
+.mobile-add-receipt-fab svg {
+    width: 28px;
+    height: 28px;
+    margin: 0;
+    transition: transform 0.2s ease;
+}
+
+.mobile-add-receipt-fab:active {
+    transform: scale(0.92);
+    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
+}
+
+.mobile-add-receipt-fab:active svg {
+    transform: rotate(90deg);
+}
+
+/* Hide FAB when modal is open */
+body.modal-open .mobile-add-receipt-fab {
+    opacity: 0;
+    pointer-events: none;
+    transform: scale(0.8);
+}
+
 @media (max-width: 768px) {
     .mobile-add-receipt-fab {
         display: flex !important;
-        position: fixed;
-        bottom: 20px;
-        right: 20px;
-        width: 56px;
-        height: 56px;
-        border-radius: var(--radius-full);
-        background: var(--gradient-fsa);
-        color: white;
-        border: none;
-        cursor: pointer;
-        z-index: 1000;
-        transition: all 0.2s ease;
-        align-items: center;
-        justify-content: center;
     }
 
-    .mobile-add-receipt-fab:active {
-        transform: scale(0.95);
+    /* Hide desktop add button on mobile */
+    #addExpenseBtn {
+        display: none !important;
     }
 }
 
@@ -159,3 +227,44 @@
         display: none !important;
     }
 }
+
+/* Responsive button improvements */
+@media (max-width: 768px) {
+    .btn {
+        padding: 0.65rem 1rem;
+        font-size: 0.95rem;
+        min-height: 44px;
+        display: inline-flex;
+        align-items: center;
+    }
+
+    .btn-small {
+        padding: 0.5rem 0.875rem;
+        font-size: 0.85rem;
+        min-height: 40px;
+    }
+
+    .btn-block {
+        min-height: 52px;
+        font-size: 1rem;
+    }
+}
+
+/* Touch-specific button improvements */
+@media (hover: none) and (pointer: coarse) {
+    .btn:active {
+        transform: scale(0.98);
+    }
+
+    .btn-primary:active {
+        box-shadow: 0 2px 4px rgba(59, 130, 246, 0.2);
+    }
+
+    .btn-success:active {
+        box-shadow: 0 2px 4px rgba(16, 185, 129, 0.2);
+    }
+
+    .btn-danger:active {
+        box-shadow: 0 2px 4px rgba(239, 68, 68, 0.2);
+    }
+}

app/assets/css/components/forms.css

@@ -518,4 +518,203 @@ html.dark-mode .radio-option:has(input[type="radio"]:checked) {
     .form-row {
         grid-template-columns: 1fr;
     }
+
+    .form-row-3 {
+        grid-template-columns: 1fr;
+    }
+
+    /* Mobile-optimized form inputs */
+    .form-group input,
+    .form-group select,
+    .form-group textarea {
+        font-size: 16px; /* Prevent zoom on iOS */
+        padding: 0.75rem 1rem;
+        min-height: 48px; /* Touch-friendly size */
+    }
+
+    .form-group label {
+        font-size: 0.9rem;
+        margin-bottom: 0.5rem;
+    }
+
+    /* Mobile-optimized drop zones */
+    .file-drop-zone {
+        padding: 2.5rem 1.5rem;
+        min-height: 140px;
+        display: flex;
+        flex-direction: column;
+        align-items: center;
+        justify-content: center;
+        border-width: 2px;
+        border-style: dashed;
+        -webkit-tap-highlight-color: transparent;
+    }
+
+    .file-drop-zone.touch-active,
+    .file-drop-zone:active {
+        border-color: var(--primary-blue);
+        background: rgba(59, 130, 246, 0.08);
+        transform: scale(0.98);
+    }
+
+    .file-drop-zone.mobile-drop-zone {
+        border-radius: 16px;
+    }
+
+    .file-drop-zone svg {
+        width: 40px;
+        height: 40px;
+        margin-bottom: 1rem;
+    }
+
+    .drop-zone-text {
+        font-size: 1rem;
+        font-weight: 500;
+    }
+
+    .drop-zone-hint {
+        font-size: 0.85rem;
+        margin-top: 0.5rem;
+    }
+
+    /* Mobile file cards */
+    .backup-file-card {
+        padding: 0.875rem;
+        gap: 0.75rem;
+        border-radius: 12px;
+    }
+
+    .file-card-icon {
+        width: 56px;
+        height: 56px;
+        border-radius: 10px;
+    }
+
+    .file-card-name {
+        font-size: 0.9rem;
+    }
+
+    .file-card-size {
+        font-size: 0.8rem;
+    }
+
+    .file-card-remove {
+        min-width: 44px;
+        min-height: 44px;
+        padding: 0.75rem;
+        border-radius: 10px;
+    }
+
+    /* Mobile existing receipts grid */
+    .existing-receipts-grid {
+        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
+        gap: 0.75rem;
+    }
+
+    .existing-receipt-item {
+        min-height: 140px;
+        border-radius: 10px;
+    }
+
+    .existing-receipt-item img {
+        height: 70px;
+        border-radius: 8px;
+    }
+
+    /* Mobile receipt delete button styling */
+    .existing-receipt-delete,
+    .receipt-delete-btn {
+        width: 100%;
+        min-height: 36px;
+        padding: 0.5rem 0.75rem;
+        font-size: 0.8rem;
+        font-weight: 500;
+        background-color: var(--danger-red);
+        color: white;
+        border: none;
+        border-radius: 6px;
+        display: flex;
+        align-items: center;
+        justify-content: center;
+        -webkit-tap-highlight-color: transparent;
+    }
+
+    .existing-receipt-delete:active,
+    .receipt-delete-btn:active {
+        background-color: #C62828;
+        transform: scale(0.98);
+    }
+
+    /* Mobile radio options */
+    .radio-group {
+        gap: 0.75rem;
+    }
+
+    .radio-option {
+        padding: 1rem;
+        min-height: 52px;
+        border-radius: 12px;
+    }
+
+    .radio-option input[type="radio"] {
+        width: 22px;
+        height: 22px;
+    }
+
+    /* Mobile provider input group - inline layout with button on right */
+    .provider-input-group {
+        flex-direction: row;
+        gap: 0.5rem;
+        align-items: stretch;
+    }
+
+    .provider-input-group select {
+        flex: 1;
+        min-width: 0; /* Allow select to shrink */
+    }
+
+    .provider-input-group .btn {
+        width: 20%;
+        min-width: 60px;
+        max-width: 80px;
+        flex-shrink: 0;
+        justify-content: center;
+        padding: 0.5rem;
+        font-size: 0.85rem;
+    }
+
+    /* Mobile form actions */
+    .form-actions {
+        flex-direction: column-reverse;
+        gap: 0.75rem;
+        padding-top: 1rem;
+        margin-top: 1.5rem;
+        border-top: 1px solid var(--border-color);
+    }
+
+    .form-actions .btn {
+        width: 100%;
+        min-height: 52px;
+        font-size: 1rem;
+        justify-content: center;
+    }
+}
+
+/* Touch-specific styles for all touch devices */
+@media (hover: none) and (pointer: coarse) {
+    .file-drop-zone {
+        -webkit-tap-highlight-color: transparent;
+        touch-action: manipulation;
+    }
+
+    .file-card-remove:active {
+        background: rgba(239, 68, 68, 0.15);
+    }
+
+    /* Larger touch targets */
+    .form-group input[type="checkbox"],
+    .form-group input[type="radio"] {
+        width: 24px;
+        height: 24px;
+    }
 }