@@ -1798,0 +1801,4 @@
+
+        assert response.status_code == 200
+        html = response.data.decode()
+        assert "/static/favicon.ico" in html

@@ -1807,0 +1818,4 @@
+        assert response.status_code == 200
+        # mimetypes.guess_type maps .ico differently per platform; both are valid.
+        assert response.content_type in ("image/x-icon", "image/vnd.microsoft.icon")
+        assert response.data[:4] == b"\x00\x00\x01\x00"

@@ -1807,0 +1826,4 @@
+
+        assert response.status_code == 200
+        assert response.content_type == "image/png"
+        assert response.data[:4] == b"\x89PNG"

@@ -1814,0 +1849,4 @@
+        assert response.status_code == 200
+        # mimetype is guessed per platform; both mappings are valid for ICO.
+        assert response.content_type in ("image/x-icon", "image/vnd.microsoft.icon")
+        assert response.data[:4] == b"\x00\x00\x01\x00"

@@ -171,3 +181,2 @@
           }
-          curl -fsSL --connect-timeout 2 --max-time 5 http://localhost:18099/favicon.ico | grep -q '<svg' || {
-            echo "/favicon.ico did not resolve to the SVG icon" >&2
+          ico_magic=$(curl -fsSL --connect-timeout 2 --max-time 5 http://localhost:18099/favicon.ico | head -c 4 | od -An -tx1 | tr -d ' \n')

@@ -133,0 +134,4 @@
+            echo "favicon.ico missing from image" >&2
+            exit 1
+          }
+          test -f "$rootfs/app/src/yunjin/web/static/apple-touch-icon.png" || {

@@ -167,3 +177,2 @@
           code=$(curl -s -o /dev/null -w '%{http_code}' --connect-timeout 2 --max-time 5 -I http://localhost:18099/favicon.ico)
-          [ "$code" = "302" ] || {
-            echo "/favicon.ico returned ${code}, expected 302" >&2
+          [ "$code" = "200" ] || {

@@ -174,0 +182,4 @@
+          # Fetch to a file: piping curl into head -c would SIGPIPE-kill curl
+          # mid-body (exit 23) under pipefail, and -f failures would be
+          # silently swallowed by the pipeline.
+          curl -fsSL --connect-timeout 2 --max-time 5 -o /tmp/favicon-smoke.ico http://localhost:18099/favicon.ico