fix rendering och refresh så det inte uppdatera sidan vid inställningar

docs/javascript-architecture.md

@@ -1423,6 +1423,12 @@ If one of these breaks, inspect this controller first.
 - `tickClockHelper(...)`
 - `handleSessionTimerTickHelper(...)`
 
+Background rendering rule:
+- `Timing`, `Dashboard`, and `Overlay` may rerender for live timing updates where explicitly allowed.
+- decoder WebSocket `open`, `close`, and `error` events must not rerender `Settings`; they update the global connection badge instead.
+- `app.js#renderViewFromBackground()` skips the one-time backend/voice refresh while a Settings control has focus or has changed.
+- explicit Settings actions such as Save, Start AMMC, Stop AMMC, or Refresh may render after completing because the submitted values are already captured.
+
 #### AMMC/backend control
 - `loadAmmcConfigFromBackendHelper(...)`
 - `saveAmmcConfigToBackendHelper(...)`
@@ -2261,6 +2267,23 @@ Mitigation:
 - treat backend hydration and local dirty flags as runtime concerns
 - inspect `src/runtime_services.js` together with the affected save path
 
+## 17.7 Settings forms replaced by decoder reconnect
+
+Observed failure:
+- decoder IP/port fields and checkboxes reset while the operator was typing
+- the operator had to enter and save values before the next refresh
+
+Pattern:
+- an unreachable or unstable WebSocket triggers `error`, `close`, reconnect after two seconds, and `open/error` again
+- each lifecycle event previously called full `renderView()` while `Settings` was active
+- initial backend hydration or `voiceschanged` could also replace a newly focused form
+
+Mitigation:
+- never include `settings` in decoder lifecycle rerender targets in `src/decoder_runtime.js`
+- use `renderViewFromBackground()` for asynchronous app/bootstrap updates
+- mark Settings as draft-active on `focusin`, `input`, and `change`
+- keep a regression assertion in `tests/decoder_runtime.test.js` that `open/error/close` does not render Settings
+
 ## 18. Automated Regression Tests
 
 Run:
@@ -2313,6 +2336,12 @@ npm test
 - dirty-state protection when newer local edits occur during a request
 - failed-sync behavior without false version advancement
 
+`tests/decoder_runtime.test.js` covers:
+- split and pit roles never incrementing normal laps
+- pit-entry attribution surviving an endurance driver/transponder change
+- one WebSocket per enabled decoder role
+- decoder lifecycle events not rerendering and replacing the Settings form
+
 `tests/audio_runtime.test.js` covers:
 - explicit and language-based speech voice selection
 - practice-specific versus race-specific start/finish phrases