Improve ODMR_Server stability and web handling

[beniroquai]

Add ISSUES.md and multiple server improvements to reduce client stalls and captive-portal churn: stop redirecting OS probe endpoints (return success codes), return 404 for unknown non-HTML assets and 204 for favicon, remove external CDN dependency from HTML, and collect Accept headers for smarter routing. Implement cached sensor reads (periodic sampler + instant /intensity response) to avoid blocking on long sensor integration times. Fix SoftAP channel selection by passing channel into WiFi.softAP(...), add /version endpoint (uses updated version_info.h), add simple ADF enable/disable endpoints, and minor logging/diagnostic prints. Also remove the ODMR_CAMERA example files and update website HTML headers to match the offline-friendly changes.

[Copilot]

Pull request overview

This PR aims to improve the ESP32-based ODMR_Server’s stability in offline SoftAP mode by reducing captive-portal churn, preventing browser retry storms, and making UI interactions work without external Bootstrap JS/CDN dependencies. It also adds firmware-side endpoints and sensor read caching to reduce perceived stalls.

Changes:

• Firmware: adjust captive-portal probe endpoints to return “success” codes, add /version + ADF enable/disable endpoints, add cached intensity sampling, and change unknown-asset handling to prefer 404s (unless HTML navigation).
• Web UI: remove laser controls, unify intensity range constants to 16-bit (65535), add “Stop measurement”, add fetch timeouts/retries, and add lightweight JS to replace Bootstrap JS behaviors (navbar/dropdown/tabs).
• Repo hygiene/docs: add ISSUES.md and remove the ODMR_CAMERA example project files.

Reviewed changes

Copilot reviewed 19 out of 21 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
Production_Files/Software/ODMR_Server/src/website_html/ratio.html	Adds local JS for navbar/dropdown behavior without Bootstrap JS.
Production_Files/Software/ODMR_Server/src/website_html/messung_webserial.html	Updates intensity range constants, removes laser UI/control, removes Bootstrap CDN JS, adds local JS replacements (incl. tabs).
Production_Files/Software/ODMR_Server/src/website_html/messung.html	Adds stop/timeout/retry logic for WiFi measurements, removes laser UI/control, removes Bootstrap CDN JS, adds local JS replacement.
Production_Files/Software/ODMR_Server/src/website_html/justage.html	Prevents overlapping /intensity requests, removes Bootstrap CDN JS, switches WebSerial gating logic, adds local JS replacement.
Production_Files/Software/ODMR_Server/src/website_html/infos.html	Adds partners section, removes Bootstrap CDN JS, switches WebSerial gating logic, adds local JS replacement.
Production_Files/Software/ODMR_Server/src/website_html/index.html	Switches WebSerial gating logic and adds local JS replacement (but still includes Bootstrap CDN JS).
Production_Files/Software/ODMR_Server/src/website/ratio_html.h	Updates embedded ratio page HTML and adds local JS replacement (but drops WebSerial nav item).
Production_Files/Software/ODMR_Server/src/website/messung_html.h	Updates embedded measurement page HTML for stop/timeout/retry + offline-friendly JS.
Production_Files/Software/ODMR_Server/src/website/justage_html.h	Updates embedded alignment page HTML for offline-friendly behavior and request throttling.
Production_Files/Software/ODMR_Server/src/website/infos_html.h	Updates embedded info page HTML for partners + offline-friendly behavior.
Production_Files/Software/ODMR_Server/src/website/index_html.h	Updates embedded index page HTML for WebSerial gating + local JS replacement (but still includes Bootstrap CDN JS).
Production_Files/Software/ODMR_Server/src/version_info.h	Updates build metadata constants used by /version.
Production_Files/Software/ODMR_Server/src/main.cpp	Implements firmware stability changes (probe endpoints, 404 routing, cached sensor reads, SoftAP channel param, /version, ADF endpoints).
Production_Files/Software/ODMR_CAMERA/src/main.cpp	Removed (camera example project cleanup).
Production_Files/Software/ODMR_CAMERA/platformio.ini	Removed (camera example project cleanup).
Production_Files/Software/ODMR_CAMERA/display.py	Removed (camera example project cleanup).
Production_Files/Software/ODMR_CAMERA/README.md	Removed (camera example project cleanup).
Production_Files/Software/ODMR_CAMERA/.vscode/extensions.json	Removed (camera example project cleanup).
Production_Files/Software/ODMR_CAMERA/.gitignore	Removed (camera example project cleanup).
ISSUES.md	Adds consolidated issue/fix tracking and rationale for changes.

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[Copilot]

server.collectHeaders("Accept") is not a valid WebServer::collectHeaders call in the Arduino-ESP32 WebServer API (it expects an array of header keys + count). As written this is likely a compile error, and server.header("Accept") will remain empty.

Update this to use the correct overload (e.g., const char* keys[] = {"Accept"}; server.collectHeaders(keys, 1);).

Suggested change

	server.collectHeaders("Accept");
	const char *headerKeys[] = {"Accept"};
	server.collectHeaders(headerKeys, 1);

[Copilot]

With the new 404-on-unknown-asset behavior, requests for NVGitter.png (referenced by the index page) will now return 404 and the image will never load. Since the repo already contains website/nvgitter_png.h, consider adding an explicit mapping/route in handleFileRequest() for /NVGitter.png and serving the binary data with the correct content-type and length.

[Copilot]

random(1, 12) generates values in the range [1, 11] (upper bound is exclusive), so channel 12 is never selected. If the intent is to randomize across channels 1–12, change this to random(1, 13) (or otherwise include 12).

[Copilot]

This page adds a custom “Bootstrap-JS replacement” script, but it still loads Bootstrap JS from the external CDN earlier in the document. In offline AP mode that CDN request can still stall page load, and you may also get duplicate/conflicting behavior.

Remove the CDN <script src="https://cdn.jsdelivr.net/...bootstrap.bundle.min.js"> from this page if the replacement is intended to fully replace Bootstrap JS.

[Copilot]

INDEX_HTML still includes a Bootstrap JS CDN <script src="https://cdn.jsdelivr.net/...bootstrap.bundle.min.js"> even though a custom “Bootstrap-JS replacement” was added. In offline AP mode this external request can stall page load, and it also risks duplicate/conflicting navbar/dropdown handling.

If the goal is fully offline-friendly pages, remove the CDN Bootstrap JS reference from the embedded HTML.

[Copilot]

The ratio page navbar no longer includes the Messung (WebSerial) nav item (webSerialNavItem) while other pages still do (and now hide/show it dynamically). This makes navigation inconsistent and prevents reaching the WebSerial page from ratio.html.

Consider restoring the WebSerial nav item here and applying the same /webserial_check + navigator.serial gating used on the other pages.

[Copilot]

The custom navbar/dropdown toggle script toggles visibility but does not update aria-expanded on the toggler/dropdown elements. That leaves ARIA state incorrect for assistive technologies.

When toggling the show class, also update the relevant aria-expanded attributes (and consider keyboard/focus handling if replacing Bootstrap behaviors).

Suggested change

	b.addEventListener('click',function(){var t=document.querySelector(b.getAttribute('data-bs-target'));if(t)t.classList.toggle('show');});
	});
	document.querySelectorAll('.dropdown-toggle').forEach(function(b){
	b.addEventListener('click',function(e){e.preventDefault();var m=b.nextElementSibling;if(m&&m.classList.contains('dropdown-menu'))m.classList.toggle('show');});
	});
	document.addEventListener('click',function(e){if(!e.target.closest('.dropdown'))document.querySelectorAll('.dropdown-menu.show').forEach(function(m){m.classList.remove('show');});});
	b.addEventListener('click', function(){
	var t = document.querySelector(b.getAttribute('data-bs-target'));
	if (t) {
	var isShown = t.classList.toggle('show');
	b.setAttribute('aria-expanded', isShown ? 'true' : 'false');
	}
	});
	});
	document.querySelectorAll('.dropdown-toggle').forEach(function(b){
	b.addEventListener('click', function(e){
	e.preventDefault();
	var m = b.nextElementSibling;
	if (m && m.classList.contains('dropdown-menu')) {
	var isShown = m.classList.toggle('show');
	b.setAttribute('aria-expanded', isShown ? 'true' : 'false');
	m.setAttribute('aria-hidden', isShown ? 'false' : 'true');
	}
	});
	});
	document.addEventListener('click', function(e){
	if (!e.target.closest('.dropdown')) {
	document.querySelectorAll('.dropdown-menu.show').forEach(function(m){
	m.classList.remove('show');
	m.setAttribute('aria-hidden', 'true');
	var parent = m.parentElement;
	if (parent) {
	var toggle = parent.querySelector('.dropdown-toggle');
	if (toggle) {
	toggle.setAttribute('aria-expanded', 'false');
	}
	}
	});
	}
	});