feat(marketing): HoM feature-spotlight X drafts + brand-voice charter (v0.18.0 B)

The Head of Marketing now markets features, not just releases: a default-off
x_feature_spotlight loop periodically spawns the HoM to investigate what shipped
(CHANGELOG, feature flags, docs/map, KB) and draft ONE held marketing post via
propose_feature_spotlight, reviewed in the X post queue.

- New x_feature source (distinct from x_post, fixing panel mislabeling) + a
  panel Feature-spotlight branch.
- brand_voice column on company_goals (migration 061, single head) as the
  CEO-editable voice source, surfaced in Settings and injected into the HoM
  briefing; a VOICE GUIDE baseline in head-marketing.md.
- propose_feature_spotlight verb (HoM-only), mirroring propose_roadmap.

Gated by x_feature_spotlight_enabled (default off; flag-off dormancy proven).
Also fixed two real bugs found mid-build: company_goals API schemas dropped
brand_voice on GET/PUT; the live charter UI is goals-tab.tsx, not the unmounted
company-goals-card.tsx. Full suite green (2935); migration single-head verified.

panel/src/components/dashboard/x-post-queue.tsx

@@ -23,16 +23,17 @@ import {
 } from "@/components/ui/dialog";
 import { Textarea } from "@/components/ui/textarea";
 import { Label } from "@/components/ui/label";
-import { AtSign, CheckCircle2, Rocket, XCircle } from "lucide-react";
+import { AtSign, CheckCircle2, Rocket, Sparkles, XCircle } from "lucide-react";
 import { toast } from "sonner";
 
 const MAX_TWEET_CHARS = 280;
 const _MIN_REASON_CHARS = 4;
 
 function sourceMeta(source: XPost["source"]) {
-  return source === "x_post"
-    ? { label: "Release post", icon: Rocket }
-    : { label: "Mention reply", icon: AtSign };
+  if (source === "x_post") return { label: "Release post", icon: Rocket };
+  if (source === "x_feature")
+    return { label: "Feature spotlight", icon: Sparkles };
+  return { label: "Mention reply", icon: AtSign };
 }
 
 function describeExecuteResult(result: XPostExecuteResult): string {
@@ -78,6 +79,11 @@ function XPostRow({
             re: {post.mention.text}
           </Badge>
         )}
+        {post.feature && (
+          <Badge variant="outline" className="max-w-56 truncate">
+            feature: {post.feature.title}
+          </Badge>
+        )}
       </div>
 
       <Textarea
@@ -195,8 +201,9 @@ export function XPostQueue({ className }: { className?: string }) {
             X Post Queue
           </CardTitle>
           <CardDescription>
-            Drafted release announcements (and mention replies, if enabled) land
-            here for you to edit, approve, or reject. Nothing posts on its own.
+            Drafted release announcements, feature spotlights, and mention
+            replies (if enabled) land here for you to edit, approve, or
+            reject. Nothing posts on its own.
           </CardDescription>
         </CardHeader>
         <CardContent>
@@ -220,8 +227,9 @@ export function XPostQueue({ className }: { className?: string }) {
             <Badge variant="secondary">{posts.length}</Badge>
           </CardTitle>
           <CardDescription>
-            Drafted release announcements and mention replies — edit, approve
-            (posts to X), or reject. Nothing posts on its own.
+            Drafted release announcements, feature spotlights, and mention
+            replies — edit, approve (posts to X), or reject. Nothing posts on
+            its own.
           </CardDescription>
         </CardHeader>
         <CardContent className="space-y-3">