feat: company-prefixed routing, delete tests, docs favicon, and skills

Add company-prefix URL routing utilities and custom router wrapper.
Add CLI company delete confirmation tests. Add docs favicon and
para-memory-files skill.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ui/src/lib/company-routes.ts

@@ -0,0 +1,85 @@
+const BOARD_ROUTE_ROOTS = new Set([
+  "dashboard",
+  "companies",
+  "company",
+  "org",
+  "agents",
+  "projects",
+  "issues",
+  "goals",
+  "approvals",
+  "costs",
+  "activity",
+  "inbox",
+  "design-guide",
+]);
+
+const GLOBAL_ROUTE_ROOTS = new Set(["auth", "invite", "board-claim", "docs"]);
+
+export function normalizeCompanyPrefix(prefix: string): string {
+  return prefix.trim().toUpperCase();
+}
+
+function splitPath(path: string): { pathname: string; search: string; hash: string } {
+  const match = path.match(/^([^?#]*)(\?[^#]*)?(#.*)?$/);
+  return {
+    pathname: match?.[1] ?? path,
+    search: match?.[2] ?? "",
+    hash: match?.[3] ?? "",
+  };
+}
+
+function getRootSegment(pathname: string): string | null {
+  const segment = pathname.split("/").filter(Boolean)[0];
+  return segment ?? null;
+}
+
+export function isGlobalPath(pathname: string): boolean {
+  if (pathname === "/") return true;
+  const root = getRootSegment(pathname);
+  if (!root) return true;
+  return GLOBAL_ROUTE_ROOTS.has(root.toLowerCase());
+}
+
+export function isBoardPathWithoutPrefix(pathname: string): boolean {
+  const root = getRootSegment(pathname);
+  if (!root) return false;
+  return BOARD_ROUTE_ROOTS.has(root.toLowerCase());
+}
+
+export function extractCompanyPrefixFromPath(pathname: string): string | null {
+  const segments = pathname.split("/").filter(Boolean);
+  if (segments.length === 0) return null;
+  const first = segments[0]!.toLowerCase();
+  if (GLOBAL_ROUTE_ROOTS.has(first) || BOARD_ROUTE_ROOTS.has(first)) {
+    return null;
+  }
+  return normalizeCompanyPrefix(segments[0]!);
+}
+
+export function applyCompanyPrefix(path: string, companyPrefix: string | null | undefined): string {
+  const { pathname, search, hash } = splitPath(path);
+  if (!pathname.startsWith("/")) return path;
+  if (isGlobalPath(pathname)) return path;
+  if (!companyPrefix) return path;
+
+  const prefix = normalizeCompanyPrefix(companyPrefix);
+  const activePrefix = extractCompanyPrefixFromPath(pathname);
+  if (activePrefix) return path;
+
+  return `/${prefix}${pathname}${search}${hash}`;
+}
+
+export function toCompanyRelativePath(path: string): string {
+  const { pathname, search, hash } = splitPath(path);
+  const segments = pathname.split("/").filter(Boolean);
+
+  if (segments.length >= 2) {
+    const second = segments[1]!.toLowerCase();
+    if (!GLOBAL_ROUTE_ROOTS.has(segments[0]!.toLowerCase()) && BOARD_ROUTE_ROOTS.has(second)) {
+      return `/${segments.slice(1).join("/")}${search}${hash}`;
+    }
+  }
+
+  return `${pathname}${search}${hash}`;
+}