diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1366216..318a2a1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,20 @@ former name, "Daybook".)
 
 _Nothing yet._
 
+## [0.6.3] — 2026-09-07
+
+### Changed
+- **User-facing wording: "artifact(s)" → "messages"** throughout the UI (feed
+  count, empty states, preview, About, Storage). The model, API
+  (`/api/artifacts`), and posting skill keep "artifact" as the internal term —
+  no contract change for agents.
+- Sidebar: the Keep/Deleted folders now have spacing between them and share the
+  "All sources" bold+blue-tint styling (they're special folders).
+
+### Fixed
+- About page now points to Settings → API Keys (was the stale "Settings →
+  Account / personal API token").
+
 ## [0.6.2] — 2026-09-07
 
 ### Changed
@@ -221,7 +235,8 @@ First tagged release.
 - Dockerised (Gunicorn + whitenoise), SQLite, `git`-based deploy with a
   runbook (`deploy/cloud_agent_deploy.md`) and health check.
 
-[Unreleased]: https://git.cygnus.systems/peter/daybook/compare/v0.6.2...HEAD
+[Unreleased]: https://git.cygnus.systems/peter/daybook/compare/v0.6.3...HEAD
+[0.6.3]: https://git.cygnus.systems/peter/daybook/compare/v0.6.2...v0.6.3
 [0.6.2]: https://git.cygnus.systems/peter/daybook/compare/v0.6.1...v0.6.2
 [0.6.1]: https://git.cygnus.systems/peter/daybook/compare/v0.6.0...v0.6.1
 [0.6.0]: https://git.cygnus.systems/peter/daybook/compare/v0.5.1...v0.6.0
diff --git a/daybook_project/__init__.py b/daybook_project/__init__.py
index 28b8174..b040cb3 100644
--- a/daybook_project/__init__.py
+++ b/daybook_project/__init__.py
@@ -1,4 +1,4 @@
 # Single source of truth for the app version. Bump this, commit, then tag the
 # commit `vX.Y.Z` and deploy. Surfaced on Settings -> About and in
 # GET /api/capabilities ("version").
-__version__ = "0.6.2"
+__version__ = "0.6.3"
diff --git a/static/agentfeed.css b/static/agentfeed.css
index d282868..ca19527 100644
--- a/static/agentfeed.css
+++ b/static/agentfeed.css
@@ -1139,20 +1139,25 @@ kbd {
   display: flex;
   flex-direction: column;
   flex-shrink: 0;
-  padding: 0.4rem 0.6rem 0.2rem;
+  gap: 0.25rem;   /* space Keep / Deleted apart */
+  padding: 0.4rem 0.6rem 0.3rem;
 }
 
-/* "All sources" — the primary entry, visually distinct from individual sources:
-   bold, with a subtle blue tint (works over both light and dark surfaces). */
-.all-sources-link {
+/* "Special" sidebar entries — "All sources" and the Keep/Deleted folders —
+   share a distinct look (bold + subtle blue tint) to set them apart from the
+   individual sources. */
+.all-sources-link,
+.folder-link {
   font-weight: 600;
 }
 
-.all-sources-link:not(.selected) {
+.all-sources-link:not(.selected),
+.folder-link:not(.selected) {
   background: rgba(74, 110, 168, 0.14);
 }
 
-.all-sources-link:not(.selected):hover {
+.all-sources-link:not(.selected):hover,
+.folder-link:not(.selected):hover {
   background: rgba(74, 110, 168, 0.22);
 }
 
diff --git a/templates/artifacts/feed.html b/templates/artifacts/feed.html
index a8e9cca..daa2182 100644
--- a/templates/artifacts/feed.html
+++ b/templates/artifacts/feed.html
@@ -73,7 +73,7 @@
         {% if selected_folder == 'deleted' %}
           <button type="button" class="empty-trash-button" data-empty-trash>Empty Trash</button>
         {% else %}
-          <span>{{ artifacts|length }} artifact{{ artifacts|length|pluralize }}</span>
+          <span>{{ artifacts|length }} message{{ artifacts|length|pluralize }}</span>
         {% endif %}
       </div>
 
@@ -82,7 +82,7 @@
           {% include "artifacts/_day_groups.html" with has_more=older_count next_before=window_start|date:"Y-m-d" %}
         {% else %}
           <div class="empty compact">
-            <h3>No artifacts</h3>
+            <h3>No messages</h3>
             <p>Nothing in the last {{ 7 }} days for these filters.</p>
           </div>
         {% endif %}
@@ -94,7 +94,7 @@
     <section class="preview-pane">
       <header class="pane-bar preview-actions" data-actions>
         <div class="preview-title" data-preview-title {% if selected_artifact %}title="{{ selected_artifact.title }}"{% endif %}>
-          {% if selected_artifact %}{{ selected_artifact.title }}{% else %}No artifact loaded{% endif %}
+          {% if selected_artifact %}{{ selected_artifact.title }}{% else %}No message loaded{% endif %}
         </div>
         <nav class="view-toggle" aria-label="Preview mode">
           <a class="{% if selected_view == 'rendered' %}selected{% endif %}{% if not selected_artifact %} disabled{% endif %}" href="{% if selected_artifact %}{{ rendered_url }}{% else %}#{% endif %}" data-view="rendered" {% if not selected_artifact %}aria-disabled="true"{% endif %}>Rendered</a>
@@ -124,8 +124,8 @@
             <img class="preview-image" src="{% url 'artifact' selected_artifact.id %}" alt="{{ selected_artifact.title }}">
           {% elif selected_artifact.kind == "binary" %}
             <div class="empty preview-empty">
-              <h2>Binary Artifact</h2>
-              <p>This artifact type cannot be previewed inline yet.</p>
+              <h2>Binary Message</h2>
+              <p>This message type cannot be previewed inline yet.</p>
               <p><a href="{% url 'artifact' selected_artifact.id %}">Open or download it</a>.</p>
             </div>
           {% else %}
@@ -135,10 +135,10 @@
       {% else %}
         <div class="empty preview-empty">
           {% if artifacts %}
-            <h2>No artifact loaded</h2>
-            <p>Press <kbd>Right Arrow</kbd> or select an artifact from the middle column to preview it.</p>
+            <h2>No message loaded</h2>
+            <p>Press <kbd>Right Arrow</kbd> or select a message from the middle column to preview it.</p>
           {% else %}
-            <h2>No artifacts for this day</h2>
+            <h2>No messages for this day</h2>
             <p>This day is ready for new agent output.</p>
           {% endif %}
         </div>
@@ -239,7 +239,7 @@
         try {
           await navigator.clipboard.writeText(absoluteUrl);
         } catch {
-          window.prompt("Copy artifact link", absoluteUrl);
+          window.prompt("Copy message link", absoluteUrl);
         }
         const original = button.textContent;
         button.textContent = "Copied";
@@ -348,7 +348,7 @@
         if (!actions) return;
         const previewTitle = actions.querySelector("[data-preview-title]");
         if (previewTitle) {
-          previewTitle.textContent = "No artifact loaded";
+          previewTitle.textContent = "No message loaded";
           previewTitle.removeAttribute("title");
         }
         actions.querySelectorAll("[data-view]").forEach((link) => {
@@ -484,7 +484,7 @@
         const header = document.querySelector(".artifact-sidebar .pane-heading span");
         if (!header) return;
         const total = Math.max(0, (parseInt(header.textContent, 10) || 0) + delta);
-        header.textContent = `${total} artifact${total === 1 ? "" : "s"}`;
+        header.textContent = `${total} message${total === 1 ? "" : "s"}`;
       };
 
       const bumpFolderCount = (folder, delta) => {
@@ -632,7 +632,7 @@
           : kind === "image"
             ? `<img class="preview-image" src="${source}" alt="${title}">`
             : kind === "binary"
-              ? `<div class="empty preview-empty"><h2>Binary Artifact</h2><p>This artifact type cannot be previewed inline yet.</p><p><a href="${source}">Open or download it</a>.</p></div>`
+              ? `<div class="empty preview-empty"><h2>Binary Message</h2><p>This message type cannot be previewed inline yet.</p><p><a href="${source}">Open or download it</a>.</p></div>`
               : `<iframe class="preview-frame" src="${source}" title="${title}"></iframe>`;
 
         previewBody.innerHTML = `<div class="preview-frame-wrap">${content}</div>`;
@@ -647,7 +647,7 @@
         }
         allRows().forEach((candidate) => candidate.classList.remove("selected"));
         disableActions();
-        previewBody.innerHTML = `<div class="empty preview-empty"><h2>No artifact loaded</h2><p>Press <kbd>Right Arrow</kbd> or select an artifact from the middle column to preview it.</p></div>`;
+        previewBody.innerHTML = `<div class="empty preview-empty"><h2>No message loaded</h2><p>Press <kbd>Right Arrow</kbd> or select a message from the middle column to preview it.</p></div>`;
         window.history.pushState({}, "", noPreviewUrl());
         const currentSource = document.querySelector(".source-link.selected");
         if (currentSource) currentSource.focus({preventScroll: true});
@@ -885,7 +885,7 @@
           const header = document.querySelector(".artifact-sidebar .pane-heading span");
           if (header) {
             const total = (parseInt(header.textContent, 10) || 0) + data.count;
-            header.textContent = `${total} artifact${total === 1 ? "" : "s"}`;
+            header.textContent = `${total} message${total === 1 ? "" : "s"}`;
           }
         } catch {
           // ignore; retry next tick
diff --git a/templates/artifacts/settings_about.html b/templates/artifacts/settings_about.html
index c2a49ef..d7b536d 100644
--- a/templates/artifacts/settings_about.html
+++ b/templates/artifacts/settings_about.html
@@ -10,11 +10,11 @@
   </div>
 
   <p>A self-hosted, multi-user journal where AI agents, scripts, or people
-  publish artifacts — reports, HTML, decks, images, PDFs, JSON, CSV — and each
+  publish messages — reports, HTML, decks, images, PDFs, JSON, CSV — and each
   logged-in user browses their own time-ordered, label-filterable feed. The
   server owns IDs, styling, and storage; agents publish content, not files.</p>
 
-  <p class="storage-note">Post to it with a personal API token from
-  Settings&nbsp;→&nbsp;Account; the current API capabilities (including this
-  version) are available at <code>/api/capabilities</code>.</p>
+  <p class="storage-note">Post to it with a personal API key from
+  Settings&nbsp;→&nbsp;API&nbsp;Keys; the current API capabilities (including
+  this version) are available at <code>/api/capabilities</code>.</p>
 {% endblock %}
diff --git a/templates/artifacts/settings_demo_data.html b/templates/artifacts/settings_demo_data.html
index 4726753..6375e2d 100644
--- a/templates/artifacts/settings_demo_data.html
+++ b/templates/artifacts/settings_demo_data.html
@@ -2,7 +2,7 @@
 
 {% block settings_content %}
   <h2>Demo Data</h2>
-  <p>Generate one sample artifact of every supported kind (markdown, HTML fragment, full HTML, deck, image, PDF, binary), tagged "demo" and dated today.</p>
+  <p>Generate one sample message of every supported kind (markdown, HTML fragment, full HTML, deck, image, PDF, binary), tagged "demo" and dated today.</p>
   <form method="post">
     {% csrf_token %}
     <button type="submit">Generate Demo Data</button>
diff --git a/templates/artifacts/settings_storage.html b/templates/artifacts/settings_storage.html
index b511fa0..84991bb 100644
--- a/templates/artifacts/settings_storage.html
+++ b/templates/artifacts/settings_storage.html
@@ -11,14 +11,14 @@
   </p>
 
   <ul class="storage-facts">
-    <li>{{ artifact_count }} artifact{{ artifact_count|pluralize }} total</li>
+    <li>{{ artifact_count }} message{{ artifact_count|pluralize }} total</li>
     <li>{{ kept_count }} kept ({{ kept_bytes|filesizeformat }}) &mdash; never auto-deleted</li>
   </ul>
 
   <p class="storage-note">
-    When your quota fills, the oldest <strong>unkept</strong> artifacts are deleted
-    automatically to make room for new ones. Click <strong>Keep</strong> on an artifact
-    to protect it. If the quota is full of kept artifacts, new posts are rejected until
+    When your quota fills, the oldest <strong>unkept</strong> messages are deleted
+    automatically to make room for new ones. Click <strong>Keep</strong> on a message
+    to protect it. If the quota is full of kept messages, new posts are rejected until
     you free space.
   </p>
 
@@ -26,7 +26,7 @@
     <h3>Admin</h3>
     <ul class="storage-facts">
       <li>Total quota allocated across all users: <strong>{{ total_allocated|filesizeformat }}</strong></li>
-      <li>Free space on the artifact disk: <strong>{{ disk_free|filesizeformat }}</strong></li>
+      <li>Free space on the storage disk: <strong>{{ disk_free|filesizeformat }}</strong></li>
     </ul>
     {% if total_allocated > disk_free %}
       <p class="storage-warning">