fix: wss support, polling fallback, cancellation, offline labels, screen sizing

- frontend/app.js: use wss:// when page is served over HTTPS; add HTTP polling
  fallback (/state every 2s) when WebSocket is down, amber dot = polling mode;
  stop polling on WS reconnect; clearer state labels (LOG OFFLINE, LOAD ERROR,
  DISCONNECTED); fix replace('_',' ') to use regex for multi-underscore states
- frontend/style.css: add #ws-dot.polling (amber); min-height 280px on screen;
  shrink llama-wrap/SVG; tighten screen padding and gap
- log_parser.py: detect cancelled requests (stop: cancel task / Connection
  handling canceled) → idle; fix: switch to generating at progress=1.00
- server.py: add GET /state endpoint for polling fallback

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/style.css

@@ -46,15 +46,15 @@ html, body {
 #screen {
   position: relative;
   width: 280px;
-  min-height: 380px;
+  min-height: 280px;
   background: #0d0d06;
   border: 3px solid var(--amber-dim);
   border-radius: 12px;
-  padding: 1.5rem 1rem 1rem;
+  padding: 1.2rem 1rem 0.8rem;
   display: flex;
   flex-direction: column;
   align-items: center;
-  gap: 0.8rem;
+  gap: 0.5rem;
   /* CRT scanline overlay */
   background-image: repeating-linear-gradient(
     0deg,
@@ -78,6 +78,7 @@ html, body {
   transition: background 0.3s;
 }
 #ws-dot.connected   { background: var(--green); }
+#ws-dot.polling     { background: var(--amber-dim); }
 #ws-dot.pulse       { animation: pulse-dot 0.3s ease-out; }
 
 @keyframes pulse-dot {
@@ -88,16 +89,16 @@ html, body {
 /* ── Llama container ─────────────────────────────────────────────────────── */
 #llama-wrap {
   position: relative;
-  width: 160px;
-  height: 200px;
+  width: 150px;
+  height: 175px;
   display: flex;
   align-items: center;
   justify-content: center;
 }
 
 #llama {
-  width: 140px;
-  height: 180px;
+  width: 135px;
+  height: 160px;
 }
 
 /* SVG part colors */