feat(workspace): claudemesh me topics + dashboard topics page

ships v0.4.0 phase 2: a cross-mesh topic feed.

api: GET /v1/me/topics aggregates topics across every mesh the
caller belongs to with per-topic unread counts (vs the user's
member-row last_read_at) and last-message timestamps. Sorted by
last activity.

cli (1.11.0): claudemesh me topics renders the feed; --unread
filters to topics with pending reads; --json returns raw.

web: /dashboard/topics ssr's the same view server-side (direct
db queries, no apikey-mint roundtrip) and adds a Topics entry
to the dashboard sidebar between Meshes and Invites.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/src/app/[locale]/dashboard/(user)/layout.tsx

@@ -25,6 +25,11 @@ const menu = [
         href: pathsConfig.dashboard.user.meshes.index,
         icon: Icons.Share,
       },
+      {
+        title: "topics",
+        href: pathsConfig.dashboard.user.topics,
+        icon: Icons.MessageSquare,
+      },
       {
         title: "invites",
         href: pathsConfig.dashboard.user.invites,

apps/web/src/app/[locale]/dashboard/(user)/topics/page.tsx

@@ -0,0 +1,253 @@
+import Link from "next/link";
+
+import { db } from "@turbostarter/db/server";
+import {
+  mesh,
+  meshMember,
+  meshTopic,
+  meshTopicMember,
+  meshTopicMessage,
+} from "@turbostarter/db/schema/mesh";
+import { and, asc, count, eq, inArray, isNull, or, sql } from "drizzle-orm";
+
+import { pathsConfig } from "~/config/paths";
+import { getSession } from "~/lib/auth/server";
+import { getMetadata } from "~/lib/metadata";
+import { Reveal } from "~/modules/dashboard/universe/reveal";
+
+export const generateMetadata = getMetadata({
+  title: "Topics",
+  description: "Every topic across every mesh — sorted by activity.",
+});
+
+const formatRelative = (iso: string | null) => {
+  if (!iso) return "never";
+  const sec = Math.max(0, Math.floor((Date.now() - new Date(iso).getTime()) / 1000));
+  if (sec < 60) return `${sec}s ago`;
+  if (sec < 3600) return `${Math.floor(sec / 60)}m ago`;
+  if (sec < 86_400) return `${Math.floor(sec / 3600)}h ago`;
+  if (sec < 86_400 * 30) return `${Math.floor(sec / 86_400)}d ago`;
+  if (sec < 86_400 * 365) return `${Math.floor(sec / (86_400 * 30))}mo ago`;
+  return `${Math.floor(sec / (86_400 * 365))}y ago`;
+};
+
+export default async function WorkspaceTopicsPage() {
+  const { user } = await getSession();
+  if (!user) {
+    return null;
+  }
+
+  // Resolve every active membership for this user → list of (memberId, mesh).
+  const memberships = await db
+    .select({
+      memberId: meshMember.id,
+      meshId: meshMember.meshId,
+      meshSlug: mesh.slug,
+      meshName: mesh.name,
+    })
+    .from(meshMember)
+    .innerJoin(mesh, eq(mesh.id, meshMember.meshId))
+    .where(
+      and(
+        eq(meshMember.userId, user.id),
+        isNull(meshMember.revokedAt),
+        isNull(mesh.archivedAt),
+      ),
+    );
+
+  const meshIds = memberships.map((m) => m.meshId);
+  const myMemberIds = memberships.map((m) => m.memberId);
+  const memberByMeshId = new Map(memberships.map((m) => [m.meshId, m]));
+
+  const topics = meshIds.length
+    ? await db
+        .select({
+          id: meshTopic.id,
+          meshId: meshTopic.meshId,
+          name: meshTopic.name,
+          description: meshTopic.description,
+          createdAt: meshTopic.createdAt,
+        })
+        .from(meshTopic)
+        .where(
+          and(inArray(meshTopic.meshId, meshIds), isNull(meshTopic.archivedAt)),
+        )
+        .orderBy(asc(meshTopic.name))
+    : [];
+
+  const topicIds = topics.map((t) => t.id);
+
+  const lastMessages = topicIds.length
+    ? await db
+        .select({
+          topicId: meshTopicMessage.topicId,
+          lastAt: sql<Date>`max(${meshTopicMessage.createdAt})`,
+        })
+        .from(meshTopicMessage)
+        .where(inArray(meshTopicMessage.topicId, topicIds))
+        .groupBy(meshTopicMessage.topicId)
+    : [];
+  const lastByTopic = new Map(lastMessages.map((r) => [r.topicId, r.lastAt]));
+
+  const unreadCounts =
+    topicIds.length && myMemberIds.length
+      ? await db
+          .select({
+            topicId: meshTopicMessage.topicId,
+            n: count(meshTopicMessage.id),
+          })
+          .from(meshTopicMessage)
+          .leftJoin(
+            meshTopicMember,
+            and(
+              eq(meshTopicMember.topicId, meshTopicMessage.topicId),
+              inArray(meshTopicMember.memberId, myMemberIds),
+            ),
+          )
+          .where(
+            and(
+              inArray(meshTopicMessage.topicId, topicIds),
+              sql`${meshTopicMessage.senderMemberId} <> ALL(${myMemberIds})`,
+              or(
+                isNull(meshTopicMember.lastReadAt),
+                sql`${meshTopicMessage.createdAt} > ${meshTopicMember.lastReadAt}`,
+              ),
+            ),
+          )
+          .groupBy(meshTopicMessage.topicId)
+      : [];
+  const unreadByTopic = new Map(unreadCounts.map((r) => [r.topicId, Number(r.n)]));
+
+  const items = topics
+    .map((t) => {
+      const m = memberByMeshId.get(t.meshId)!;
+      const lastAt = lastByTopic.get(t.id);
+      return {
+        ...t,
+        meshSlug: m.meshSlug,
+        meshName: m.meshName,
+        unread: unreadByTopic.get(t.id) ?? 0,
+        lastMessageAt: lastAt ? new Date(lastAt).toISOString() : null,
+      };
+    })
+    .sort((a, b) => {
+      if (a.lastMessageAt && b.lastMessageAt) {
+        return b.lastMessageAt.localeCompare(a.lastMessageAt);
+      }
+      if (a.lastMessageAt) return -1;
+      if (b.lastMessageAt) return 1;
+      return a.name.localeCompare(b.name);
+    });
+
+  const totalUnread = items.reduce((acc, t) => acc + t.unread, 0);
+
+  return (
+    <div className="@container relative h-full p-6 md:p-10">
+      <div
+        aria-hidden
+        className="pointer-events-none absolute inset-0 z-0"
+        style={{
+          background:
+            "radial-gradient(ellipse 70% 50% at 85% -5%, rgba(188,209,202,0.08), transparent 70%)",
+        }}
+      />
+      <div className="relative z-10 mx-auto max-w-[1100px]">
+        <header className="mb-10 grid gap-6 border-b border-[var(--cm-border-soft,rgba(217,119,87,0.1))] pb-8 md:mb-14 md:grid-cols-[1fr_auto] md:items-end md:pb-10">
+          <Reveal delay={0}>
+            <h1
+              className="text-[clamp(2rem,1.6rem+2.5vw,3.25rem)] leading-[1.05] tracking-tight"
+              style={{ fontFamily: "var(--cm-font-serif)", fontWeight: 400 }}
+            >
+              Every <span className="italic text-[var(--cm-clay)]">topic</span>,
+              <br />
+              <span className="italic text-[var(--cm-fg-tertiary)]">across every</span>{" "}
+              mesh.
+            </h1>
+          </Reveal>
+
+          <Reveal delay={1}>
+            <div className="flex items-baseline gap-6 font-mono text-[12px] uppercase tracking-[0.18em] text-[var(--cm-fg-tertiary)]">
+              <span>
+                <span className="mr-2 text-[var(--cm-fg)]">{items.length}</span>
+                topics
+              </span>
+              <span>
+                <span
+                  className={`mr-2 ${totalUnread > 0 ? "text-[var(--cm-clay)]" : "text-[var(--cm-fg)]"}`}
+                >
+                  {totalUnread}
+                </span>
+                unread
+              </span>
+              <span>
+                <span className="mr-2 text-[var(--cm-fg)]">{memberships.length}</span>
+                meshes
+              </span>
+            </div>
+          </Reveal>
+        </header>
+
+        {items.length === 0 ? (
+          <p className="text-[var(--cm-fg-secondary)]">
+            No topics yet.{" "}
+            <Link
+              href={pathsConfig.dashboard.user.meshes.index}
+              className="text-[var(--cm-clay)] underline-offset-4 hover:underline"
+            >
+              Open a mesh
+            </Link>{" "}
+            to start one.
+          </p>
+        ) : (
+          <ul className="divide-y divide-[var(--cm-border-soft,rgba(217,119,87,0.1))] border-y border-[var(--cm-border-soft,rgba(217,119,87,0.1))]">
+            {items.map((t, i) => (
+              <Reveal key={t.id} delay={Math.min(i, 8)}>
+                <li>
+                  <Link
+                    href={pathsConfig.dashboard.user.meshes.topic(t.meshId, t.name)}
+                    className="group flex items-center gap-5 px-2 py-4 transition-colors duration-200 hover:bg-[var(--cm-bg-hover)]"
+                  >
+                    <span className="flex w-32 shrink-0 items-center font-mono text-[11px] uppercase tracking-[0.16em] text-[var(--cm-fg-tertiary)]">
+                      {t.meshSlug}
+                    </span>
+
+                    <span className="flex min-w-0 flex-1 items-baseline gap-3">
+                      <span
+                        className="truncate text-[18px] tracking-tight text-[var(--cm-fg)] group-hover:text-[var(--cm-clay)]"
+                        style={{ fontFamily: "var(--cm-font-serif)" }}
+                      >
+                        {t.name}
+                      </span>
+                      {t.description ? (
+                        <span className="hidden truncate text-[13px] text-[var(--cm-fg-tertiary)] md:inline">
+                          {t.description}
+                        </span>
+                      ) : null}
+                    </span>
+
+                    <span className="w-24 shrink-0 text-right">
+                      {t.unread > 0 ? (
+                        <span className="inline-flex items-center gap-1.5 rounded-full border border-[rgba(217,119,87,0.4)] bg-[rgba(217,119,87,0.08)] px-2.5 py-0.5 font-mono text-[11px] text-[var(--cm-clay)]">
+                          <span className="size-[6px] rounded-full bg-[var(--cm-clay)]" />
+                          {t.unread}
+                        </span>
+                      ) : (
+                        <span className="font-mono text-[11px] text-[var(--cm-fg-tertiary)]">
+                          ·
+                        </span>
+                      )}
+                    </span>
+
+                    <span className="w-20 shrink-0 text-right font-mono text-[11px] text-[var(--cm-fg-tertiary)]">
+                      {formatRelative(t.lastMessageAt)}
+                    </span>
+                  </Link>
+                </li>
+              </Reveal>
+            ))}
+          </ul>
+        )}
+      </div>
+    </div>
+  );
+}

apps/web/src/config/paths.ts

@@ -103,6 +103,7 @@ const pathsConfig = {
         topic: (id: string, name: string) =>
           `${DASHBOARD_PREFIX}/meshes/${id}/topics/${encodeURIComponent(name)}`,
       },
+      topics: `${DASHBOARD_PREFIX}/topics`,
       invites: `${DASHBOARD_PREFIX}/invites`,
       settings: {
         index: `${DASHBOARD_PREFIX}/settings`,