Add HTTPS demo entry for microphone access

- Add a self-signed HTTPS Nginx entrypoint on Docker port 4443 so browser microphone APIs can run in demo mode.

- Keep the existing HTTP port 4002 unchanged while exposing container port 443 and generating the demo certificate during image build.

- Update CORS defaults and Compose environment for the HTTPS frontend origin.

- Clarify the report editor microphone message with localhost, HTTPS, and browser trusted-origin demo options.

- Document the browser HTTP microphone limitation, HTTPS demo URL, and Chrome/Edge insecure-origin workaround in README and docs.

nginx.conf

@@ -33,3 +33,40 @@ server {
         add_header Cache-Control "public, immutable";
     }
 }
+
+server {
+    listen 443 ssl;
+    server_name localhost;
+    client_max_body_size 100m;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    ssl_certificate /etc/nginx/certs/surclaw-demo.crt;
+    ssl_certificate_key /etc/nginx/certs/surclaw-demo.key;
+    ssl_protocols TLSv1.2 TLSv1.3;
+    ssl_session_cache shared:SSL:10m;
+    ssl_session_timeout 10m;
+
+    gzip on;
+    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    location /api/ {
+        proxy_pass http://api:3100/api/;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection $connection_upgrade;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+
+    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+}