Fix webhook JSON example and add visible signup labels

app/(marketing)/docs/autoblog-webhook/page.tsx

@@ -107,19 +107,24 @@ User-Agent:         @profullstack/autoblog/0.3`}</pre>
       "canonical_url": "https://your-site/blog/{slug}",
       "title":         "string",
       "slug":          "kebab-case-slug",
-      "excerpt":       "≤240-char prose summary" | null,
+      "excerpt":       "≤240-char prose summary",
       "html":          "<p>…</p>",
-      "markdown":      "..." | null,
+      "markdown":      "...",
       "status":        "published",
       "published_at":  "ISO-8601",
       "updated_at":    "ISO-8601",
       "author":        null,
       "tags":          ["seo", "ai bots"],
       "categories":    [],
-      "featured_image": { "url": "https://...", "alt": "..." } | null
+      "featured_image": { "url": "https://...", "alt": "..." }
     }
   }
 }`}</pre>
+        <p className="text-sm text-[var(--color-muted)]">
+          <code>post.excerpt</code>, <code>post.markdown</code>, and{" "}
+          <code>post.featured_image</code> may each be <code>null</code>
+          {" "}when unavailable. The example above shows non-null values.
+        </p>
         <p className="text-sm text-[var(--color-muted)]">
           <code className="font-mono">meta_description</code> (≤160 chars,
           SEO copy) is sent inside the legacy fields when present but the

app/signup/form.tsx

@@ -67,25 +67,37 @@ export function SignupForm({ redirectTo, defaultEmail }: { redirectTo?: string;
         </>
       )}
       <form onSubmit={onSubmit} className="space-y-3">
-        <input
-          type="email"
-          className="input"
-          placeholder="you@company.com"
-          required
-          value={email}
-          onChange={(e) => setEmail(e.target.value)}
-          autoComplete="email"
-        />
-        <input
-          type="password"
-          className="input"
-          placeholder="Password (8+ chars)"
-          required
-          minLength={8}
-          value={password}
-          onChange={(e) => setPassword(e.target.value)}
-          autoComplete="new-password"
-        />
+        <div className="space-y-1">
+          <label htmlFor="signup-email" className="block text-sm font-medium">
+            Email
+          </label>
+          <input
+            id="signup-email"
+            type="email"
+            className="input"
+            placeholder="you@company.com"
+            required
+            value={email}
+            onChange={(e) => setEmail(e.target.value)}
+            autoComplete="email"
+          />
+        </div>
+        <div className="space-y-1">
+          <label htmlFor="signup-password" className="block text-sm font-medium">
+            Password
+          </label>
+          <input
+            id="signup-password"
+            type="password"
+            className="input"
+            placeholder="Password (8+ chars)"
+            required
+            minLength={8}
+            value={password}
+            onChange={(e) => setPassword(e.target.value)}
+            autoComplete="new-password"
+          />
+        </div>
         {error && <p className="text-sm text-[var(--color-fail)]">{error}</p>}
         <button type="submit" className="btn btn-primary w-full" disabled={pending}>
           {pending ? "Creating account…" : "Create account"}