feat(patterns,api): pattern OTA, graceful shutdown, driver delivery updates

- Pattern controller/UI and presets patterns tab for OTA to Wi-Fi drivers
- Device controller extensions; driver_delivery chunk handling
- main: SIGINT/SIGTERM shutdown, TCP/UDP server close coordination
- Submodule led-driver: Wi-Fi default transport, lazy espnow import, dynamic patterns

Made-with: Cursor

src/static/style.css

@@ -458,22 +458,28 @@ body.preset-ui-run .edit-mode-only {
 .n-param-group {
     display: flex;
     align-items: center;
-    gap: 0.5rem;
+    gap: 0.75rem;
+    justify-content: space-between;
 }
 
 .n-param-group label {
-    min-width: 40px;
+    flex: 1;
+    min-width: 0;
     font-weight: 500;
 }
 
 .n-input {
-    flex: 1;
+    flex: 0 0 var(--n-input-width, 5ch);
+    width: var(--n-input-width, 5ch);
+    max-width: 100%;
+    box-sizing: border-box;
     padding: 0.5rem;
     background-color: #3a3a3a;
     color: white;
     border: 1px solid #4a4a4a;
     border-radius: 4px;
     font-size: 1rem;
+    text-align: right;
 }
 
 .n-input:focus {
@@ -1251,6 +1257,48 @@ body.preset-ui-run .edit-mode-only {
     flex: 1;
     display: flex;
     flex-direction: column;
+    align-items: flex-end;
+}
+
+.preset-editor-field label {
+    align-self: stretch;
+}
+
+.preset-editor-field input[type="number"] {
+    width: var(--n-input-width, 5ch);
+    max-width: 100%;
+    box-sizing: border-box;
+    text-align: right;
+}
+
+/* Pattern editor: numeric metadata row */
+#pattern-editor-modal input[type="number"] {
+    width: var(--n-input-width, 5ch);
+    max-width: 100%;
+    box-sizing: border-box;
+    text-align: right;
+}
+
+/* Pattern editor: human-readable n labels (text), full width */
+#pattern-editor-modal .n-params-grid {
+    grid-template-columns: 1fr;
+}
+
+#pattern-editor-modal .n-param-group:has(.pattern-n-readable-input) {
+    justify-content: stretch;
+}
+
+#pattern-editor-modal .pattern-n-readable-input {
+    flex: 1 1 auto;
+    width: 100%;
+    min-width: 0;
+    text-align: left;
+}
+
+@supports not selector(:has(*)) {
+    #pattern-editor-modal #pattern-create-n-section .n-param-group {
+        justify-content: stretch;
+    }
 }
 
 /* Settings modal */