Phase 5c: CSS layers and light theme

- html/css split into tokens.css (custom properties), base.css (reset,
  typography, focus, skip link), components.css (buttons, inputs, tables,
  status cards, popups, menu, log lines) and layout.css (shell, sidebar,
  header, breakpoints); screen.css removed. Selectors and declarations
  moved as-is; three pairs of conflicting rules resolved in favour of the
  one that already won the cascade, two empty rules dropped.
- Every literal colour outside tokens.css is now a token (category badge
  borders excepted). color-scheme set so native controls follow.
- Light theme under prefers-color-scheme: light, with explicit
  data-theme="light"/"dark" overrides on :root for a future toggle.
  Body text 13.6:1, muted text 5.4:1, accent 5.1:1 on the light background.
- HTML: lang="en" everywhere, one h1 per page, maintenance page uses
  <main>, an id typo fixed.

ts/logs.ts

@@ -0,0 +1,73 @@
+class Log {
+
+  createLog(entry:string):any {
+
+    var element = document.createElement("PRE");
+
+    if (entry.indexOf("WARNING") != -1) {
+      element.className = "warningMsg"
+    }
+
+    if (entry.indexOf("ERROR") != -1) {
+      element.className = "errorMsg"
+    }
+
+    if (entry.indexOf("DEBUG") != -1) {
+      element.className = "debugMsg"
+    }
+
+    element.textContent = entry
+
+    return element
+  }
+
+}
+
+function showLogs(bottom:boolean) {
+
+  var log = new Log()
+
+  var logs = SERVER["log"]["log"]
+  var div = document.getElementById("content_log")
+  var wrapper = document.getElementById("box-wrapper") as HTMLElement
+  var shouldStickToBottom:boolean = bottom
+
+  div.innerHTML = ""
+
+  if (wrapper != null && shouldStickToBottom == false) {
+    var distanceToBottom:number = wrapper.scrollHeight - wrapper.scrollTop - wrapper.clientHeight
+    if (distanceToBottom < 80) {
+      shouldStickToBottom = true
+    }
+  }
+
+  var keys = getObjKeys(logs)
+
+  keys.forEach(logID => {
+
+    var entry = log.createLog(logs[logID])
+
+    div.append(entry)
+  
+  });
+
+  setTimeout(function(){ 
+
+    if (shouldStickToBottom == true && wrapper != null) {
+  
+      wrapper.scrollTop = wrapper.scrollHeight;
+
+    }
+
+  }, 10);
+
+}
+
+function resetLogs() {
+
+  var cmd = "resetLogs"
+  var data = new Object()
+  var server:Server = new Server(cmd)
+  server.request(data)
+
+}