feat: move revert action to message cards and improve article links

- Move the revert functionality from the journal input to individual
  message cards for better UX.
- Implement `RevealLink` component for article reveals to allow
  navigation without losing URL parameters.
- Add helper functions to format article paths and slugs into
  human-readable titles.

src/components/journal/JournalInput.tsx

@@ -20,12 +20,7 @@ import {
   Switch,
   Match,
 } from "solid-js";
-import {
+import { sendMessage, useJournalStream } from "../stores/journalStream";
-  sendMessage,
-  revertLatest,
-  canRevert,
-  useJournalStream,
-} from "../stores/journalStream";
 import {
   useJournalCompletions,
   ensureCompletions,
@@ -123,10 +118,7 @@ export const JournalInput: Component = () => {
     textareaRef?.focus();
   }
 
-  function handleRevert() {
+  // ---- Completions ----
-    revertLatest();
-  }
-
   // ---- Scroll selected completion into view ----
 
   createEffect(() => {
@@ -313,8 +305,6 @@ export const JournalInput: Component = () => {
     onCleanup(() => document.removeEventListener("mousedown", handler));
   });
 
-  const showRevert = () => canRevert() && stream.myName === "gm";
-
   // Completions placeholder — shown in the dropdown area when no matches
   function renderCompletionsDropdown() {
     const comps = currentCompletions();
@@ -414,15 +404,6 @@ export const JournalInput: Component = () => {
             <p class="text-red-500 text-xs truncate max-w-[60%]">{error()}</p>
           </Show>
           <div class="flex items-center gap-1 ml-auto">
-            <Show when={showRevert}>
-              <button
-                onClick={handleRevert}
-                class="text-xs text-gray-400 hover:text-red-500 px-1.5 py-0.5"
-                title="Revert last message"
-              >
-                ↩
-              </button>
-            </Show>
             <button
               onClick={handleSend}
               disabled={sending() || !text().trim()}

src/components/journal/StreamMessage.tsx

@@ -5,10 +5,16 @@
 import { Component, Show, createMemo } from "solid-js";
 import type { StreamMessage as StreamMessageType } from "./registry";
 import { getMessageType } from "./registry";
+import {
+  revertLatest,
+  canRevert,
+  useJournalStream,
+} from "../stores/journalStream";
 
 export const StreamMessageCard: Component<{
   message: StreamMessageType;
 }> = (props) => {
+  const stream = useJournalStream();
   const def = createMemo(() => getMessageType(props.message.type));
   const rendered = createMemo(() =>
     def()?.render?.(props.message.payload, props.message as any),
@@ -19,6 +25,11 @@ export const StreamMessageCard: Component<{
     return d.toLocaleTimeString([], { hour: "2-digit", minute: "2-digit" });
   });
 
+  const isMine = () => props.message.sender === stream.myName;
+  const latestSeq = () => stream.senderSeq[stream.myName] ?? 0;
+  const canRevertThis = () =>
+    isMine() && props.message.seq === latestSeq() && !props.message.reverted;
+
   const senderClass = () =>
     props.message.sender === "gm"
       ? "text-purple-600 font-semibold"
@@ -34,7 +45,19 @@ export const StreamMessageCard: Component<{
         <div class="flex items-center gap-1.5 px-2.5 py-1 bg-gray-50 border-b border-gray-100">
           <span class={`text-xs ${senderClass()}`}>{props.message.sender}</span>
           <span class="text-xs text-gray-400">{time()}</span>
-          <span class="text-xs text-gray-300 bg-gray-100 px-1 rounded ml-auto">
+          <Show when={canRevertThis()}>
+            <button
+              onClick={() => revertLatest()}
+              class="text-xs text-gray-300 hover:text-red-500 ml-auto px-0.5 leading-none"
+              title="Revert this message"
+            >
+              ×
+            </button>
+          </Show>
+          <span
+            class="text-xs text-gray-300 bg-gray-100 px-1 rounded"
+            classList={{ "ml-auto": !canRevertThis() }}
+          >
             {props.message.type}
           </span>
         </div>

src/components/journal/types/article.tsx

@@ -2,6 +2,8 @@
  * Built-in message type: article.reveal
  */
 
+import { Component } from "solid-js";
+import { useNavigate } from "@solidjs/router";
 import { z } from "zod";
 import { registerMessageType } from "../registry";
 import { journalSetState } from "../../stores/journalStream";
@@ -15,25 +17,69 @@ const schema = z.object({
 
 export type ArticleRevealPayload = z.infer<typeof schema>;
 
+function fileNameFromPath(path: string): string {
+  const parts = path.split("/").filter(Boolean);
+  return parts[parts.length - 1] || path;
+}
+
+/** Section slug → human-readable title (e.g. "attack-rules" → "Attack Rules") */
+function slugToTitle(slug: string): string {
+  return slug
+    .split("-")
+    .map((w) => w.charAt(0).toUpperCase() + w.slice(1))
+    .join(" ");
+}
+
+/** Clickable link that navigates without dropping URL params */
+const RevealLink: Component<ArticleRevealPayload> = (p) => {
+  const navigate = useNavigate();
+
+  const target = () => {
+    let t = p.path;
+    if (p.section) t += `#${p.section}`;
+    return t;
+  };
+
+  const displayLabel = () => {
+    if (p.label) return p.label;
+    const file = fileNameFromPath(p.path);
+    if (p.section) return `${file} § ${slugToTitle(p.section)}`;
+    return file;
+  };
+
+  const handleClick = (e: MouseEvent) => {
+    e.preventDefault();
+    navigate(target());
+  };
+
+  return (
+    <div class="flex items-center gap-2">
+      <span class="text-lg">📄</span>
+      <div>
+        <a
+          href={target()}
+          onClick={handleClick}
+          class="text-blue-600 underline text-sm"
+        >
+          {displayLabel()}
+        </a>
+        {p.section && (
+          <span class="text-xs text-gray-400 ml-1">
+            § {slugToTitle(p.section)}
+          </span>
+        )}
+      </div>
+    </div>
+  );
+};
+
 registerMessageType<ArticleRevealPayload>({
   type: "article.reveal",
   label: "Reveal Article",
   emitters: ["gm"],
   schema,
   defaultPayload: () => ({ path: "/" }),
-  render: (p) => (
+  render: (p) => <RevealLink {...p} />,
-    <div class="flex items-center gap-2">
-      <span class="text-lg">📄</span>
-      <div>
-        <a href={p.path} class="text-blue-600 underline text-sm">
-          {p.label || p.path}
-        </a>
-        {p.section && (
-          <span class="text-xs text-gray-400 ml-1">§ {p.section}</span>
-        )}
-      </div>
-    </div>
-  ),
   reducer: (p) => {
     journalSetState(
       produce((s) => {