minor clarifications

.github/copilot-instructions.md

@@ -33,7 +33,7 @@ Always reference these instructions first and fallback to search or bash command
 
 | Command | Purpose | Typical Time |
 |---|---|---|
-| `npm run build` | Build web UI → generates `wled00/html_*.h` headers | ~3 s |
+| `npm run build` | Build web UI → generates `wled00/html_*.h` and `wled00/js_*.h` headers | ~3 s |
 | `npm test` | Run test suite | ~40 s |
 | `npm run dev` | Watch mode — auto-rebuilds web UI on file changes | — |
 | `pio run -e <env>` | Build firmware for a hardware target | 15–20 min |

.github/cpp.instructions.md

@@ -147,12 +147,13 @@ This pattern enables optimizations and makes intent clear to reviewers.
 
 ### `const` locals
 
-Adding `const` to a local variable that is only assigned once is not necessary — but it **is** required when the variable is passed to a function that takes a `const` parameter (pointer or reference). In hot-path code, `const` on cached locals helps the compiler keep values in registers:
+* Adding `const` to a local variable that is only assigned once is optional, but *not* strictly necessary.
+* In hot-path code, `const` on cached locals may help the compiler keep values in registers:
+  ```cpp
+  const uint_fast16_t cols = vWidth();
+  const uint_fast16_t rows = vHeight();
+  ```
 
-```cpp
-const uint_fast16_t cols = virtualWidth();
-const uint_fast16_t rows = virtualHeight();
-```
 <!-- HUMAN_ONLY_END -->
 ### `const` references to avoid copies