Recursive deploy ladder: Company + Org tiers, mesh mark, two-tier rail

Completes the scale ladder (single → team → company → org). Every tier is a
topology whose nodes are the tier below; running a parent recursively runs each
child's sub-topology down to the leaf claws.

Backend:
- migration 0011: companies/company_teams, orgs/org_companies, topology_runs.tier
- cm-db repos for companies + orgs (mirror teams)
- TurnRequest.attrs (forwarded from node.attrs) for child-id binding
- SubTopologyExecutor (recursive_exec.rs): a parent "turn" runs the child's
  sub-topology; durability via parent updated_at keepalive + cancel propagation
  + depth cap; boxed future breaks the org→company recursion
- topology_worker selects executor by job.tier
- routes: /api/companies, /api/orgs (create/list/get/run) + unified
  /api/structure/{level}/{id} for the zoom canvas

Frontend:
- MeshMark: node-mesh brand glyph (replaces the claw PNG), tier variants
- TopologyGraphView: optional onNodeClick/nodeMeta + dark-token theming
- StructureCanvas + Breadcrumb: one recursive zoom view for every tier
  (drill down on node click, breadcrumb up); TeamRunPanel extracted + shared
- two-tier Discord-style rail: StructureRail (mesh mark + org/company/team
  glyphs + tools popover + deploy + user) | RosterColumn (selected group's
  children, or your claws); SecondaryNav for cross-cutting tools
- ComposeWizard (company/org) wired into DeployWizard; /companies + /orgs pages

Co-Authored-By: Claude Opus 4.8 <[email protected]>

frontend/src/app/(workspace)/layout.tsx

@@ -3,6 +3,7 @@ import { redirect } from "next/navigation";
 import { LeftRail } from "@/components/shell/LeftRail";
 import { ApiAuthError } from "@/lib/api/http";
 import { fetchClaws, fetchCredits, fetchMe } from "@/lib/api/team";
+import { fetchCompanies, fetchOrgs, fetchTeams, type GroupSummary } from "@/lib/api/structure";
 import type { Agent, Credits, User } from "@/lib/api/schemas";
 
 // Every workspace page shares the persistent rail (§4). This layout reads
@@ -13,11 +14,19 @@ export default async function WorkspaceLayout({
   let user: User;
   let roster: Agent[];
   let credits: Credits;
+  let orgs: GroupSummary[];
+  let companies: GroupSummary[];
+  let teams: GroupSummary[];
   try {
-    [user, roster, credits] = await Promise.all([
+    // Structure lists are non-critical chrome — never let one fail the shell.
+    const groups = <T,>(p: Promise<T[]>) => p.catch(() => [] as T[]);
+    [user, roster, credits, orgs, companies, teams] = await Promise.all([
       fetchMe(),
       fetchClaws(),
       fetchCredits(),
+      groups(fetchOrgs()),
+      groups(fetchCompanies()),
+      groups(fetchTeams()),
     ]);
   } catch (error) {
     if (error instanceof ApiAuthError) {
@@ -30,6 +39,9 @@ export default async function WorkspaceLayout({
       <LeftRail
         user={user}
         roster={roster}
+        orgs={orgs}
+        companies={companies}
+        teams={teams}
         creditsBalance={credits.available}
       />
       <main className="min-w-0 flex-1">{children}</main>