Split monolithic index.html and style.css for maintainability

- Extract 15 modals and 3 partials from index.html into Jinja2 templates
  (templates/modals/*.html, templates/partials/*.html)
- Split style.css (3,712 lines) into 11 feature-scoped CSS files under
  static/css/ (base, layout, components, cards, modal, calibration,
  dashboard, streams, patterns, profiles, tutorials)
- Switch root route from FileResponse to Jinja2Templates
- Add jinja2 dependency
- Consolidate duplicate @keyframes spin definition
- Browser receives identical assembled HTML — zero JS changes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/wled_controller/static/css/profiles.css

@@ -0,0 +1,185 @@
+/* ===== PROFILES ===== */
+
+.badge-profile-active {
+    background: var(--success-color, #28a745);
+    color: #fff;
+}
+
+.badge-profile-inactive {
+    background: var(--border-color);
+    color: var(--text-color);
+}
+
+.badge-profile-disabled {
+    background: var(--border-color);
+    color: var(--text-muted);
+    opacity: 0.7;
+}
+
+.profile-status-disabled {
+    opacity: 0.6;
+}
+
+.profile-logic-label {
+    font-size: 0.7rem;
+    font-weight: 600;
+    color: var(--text-muted);
+    padding: 0 4px;
+}
+
+/* Profile condition editor rows */
+.profile-condition-row {
+    border: 1px solid var(--border-color);
+    border-radius: 6px;
+    padding: 10px;
+    margin-bottom: 8px;
+    background: var(--bg-secondary, var(--bg-color));
+}
+
+.condition-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 8px;
+}
+
+.condition-type-label {
+    font-weight: 600;
+    font-size: 0.9rem;
+}
+
+.btn-remove-condition {
+    background: none;
+    border: none;
+    color: var(--danger-color, #dc3545);
+    cursor: pointer;
+    font-size: 1rem;
+    padding: 2px 6px;
+}
+
+.condition-fields {
+    display: flex;
+    flex-direction: column;
+    gap: 8px;
+}
+
+.condition-field label {
+    display: block;
+    font-size: 0.85rem;
+    margin-bottom: 3px;
+    color: var(--text-muted);
+}
+
+.condition-field select,
+.condition-field textarea {
+    width: 100%;
+    padding: 6px 8px;
+    border: 1px solid var(--border-color);
+    border-radius: 4px;
+    background: var(--bg-color);
+    color: var(--text-color);
+    font-size: 0.9rem;
+    font-family: inherit;
+}
+
+.condition-apps {
+    resize: vertical;
+    min-height: 60px;
+}
+
+.condition-apps-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+}
+
+.btn-browse-apps {
+    background: none;
+    border: 1px solid var(--border-color);
+    color: var(--text-color);
+    font-size: 0.75rem;
+    padding: 2px 8px;
+    border-radius: 4px;
+    cursor: pointer;
+    transition: border-color 0.2s, background 0.2s;
+}
+
+.btn-browse-apps:hover {
+    border-color: var(--primary-color);
+    background: rgba(33, 150, 243, 0.1);
+}
+
+.process-picker {
+    margin-top: 6px;
+    border: 1px solid var(--border-color);
+    border-radius: 4px;
+    overflow: hidden;
+}
+
+.process-picker-search {
+    width: 100%;
+    padding: 6px 8px;
+    border: none;
+    border-bottom: 1px solid var(--border-color);
+    background: var(--bg-color);
+    color: var(--text-color);
+    font-size: 0.85rem;
+    font-family: inherit;
+    outline: none;
+    box-sizing: border-box;
+}
+
+.process-picker-list {
+    max-height: 160px;
+    overflow-y: auto;
+}
+
+.process-picker-item {
+    padding: 4px 8px;
+    font-size: 0.8rem;
+    cursor: pointer;
+    transition: background 0.1s;
+}
+
+.process-picker-item:hover {
+    background: rgba(33, 150, 243, 0.15);
+}
+
+.process-picker-item.added {
+    color: var(--text-muted);
+    cursor: default;
+    opacity: 0.6;
+}
+
+.process-picker-loading {
+    padding: 8px;
+    font-size: 0.8rem;
+    color: var(--text-muted);
+    text-align: center;
+}
+
+/* Profile target checklist */
+.profile-targets-checklist {
+    max-height: 200px;
+    overflow-y: auto;
+    border: 1px solid var(--border-color);
+    border-radius: 4px;
+    padding: 6px;
+}
+
+.profile-target-item {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    padding: 4px 6px;
+    cursor: pointer;
+    border-radius: 3px;
+}
+
+.profile-target-item:hover {
+    background: var(--bg-secondary, var(--bg-color));
+}
+
+.profile-target-item input[type="checkbox"] {
+    margin: 0;
+}