feat: @gsc/web-kit v0.1.0 — Phase 1 scaffold

The kit. Drop into any GSC Next.js frontend; everything that's not
domain content lives here. Wraps @limitless/ui primitives with the
app-shaped patterns we keep reimplementing: layout, auth, data
display, forms, feedback, navigation.

Phase 1 ships the package skeleton:

- package.json with 14 sub-exports (./layout · ./auth · ./auth/server
  · ./auth/middleware · ./shell · ./shell/server · ./data · ./forms ·
  ./feedback · ./navigation · ./api · ./utils + the root and ./css).
- Empty module stubs so the import map resolves while later phases
  fill in real surface area.
- Canonical CSS bundle at @gsc/web-kit/css — all.min.css +
  sidebar-overrides.css + the seven layout-3 background images,
  copied from chronos and committed in one place so no app has to
  ship the 1MB sidecar on its own anymore.
- tsc-based build + a postbuild script that mirrors @limitless/ui:
  emits .js + .d.ts, copies styles/, rewrites bare ESM imports to
  include .js extensions.
- Peer deps on next, react, react-dom, bootstrap.
- Hard deps on @limitless/ui (file: dep), next-auth, next-intl, zod.

Build verified: tsc emits, all 14 export paths resolve under dist/.
No functional code yet — Phase 2 lands AppLayout / createAuth /
fetchShellConfig and the gscCRM pilot cuts over.

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

src/api/index.ts

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+// @gsc/web-kit/api — Phase 1 stub. Real surface lands in later phases.
+export {};

src/auth/index.ts

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+// @gsc/web-kit/auth — Phase 1 stub. Real surface lands in later phases.
+export {};

src/auth/middleware.ts

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+// @gsc/web-kit/auth/middleware — Phase 1 stub. Real createAuthMiddleware() lands in Phase 2.
+export {};

src/auth/server.ts

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+// @gsc/web-kit/auth/server — Phase 1 stub. Real createAuth() / requireAuth() lands in Phase 2.
+export {};

src/data/index.ts

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+// @gsc/web-kit/data — Phase 1 stub. Real surface lands in later phases.
+export {};

src/feedback/index.ts

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+// @gsc/web-kit/feedback — Phase 1 stub. Real surface lands in later phases.
+export {};

src/forms/index.ts

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+// @gsc/web-kit/forms — Phase 1 stub. Real surface lands in later phases.
+export {};

src/index.ts

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+// @gsc/web-kit — top-level re-exports.
+//
+// Prefer the sub-exports (`@gsc/web-kit/layout`, `…/auth`, etc.) so
+// tree-shaking can drop modules you don't use. This index is here
+// for convenience and discovery.
+
+export * from "./layout/index";
+export * from "./shell/index";
+export * from "./data/index";
+export * from "./forms/index";
+export * from "./feedback/index";
+export * from "./navigation/index";
+export * from "./api/index";
+export * from "./utils/index";
+// auth is client-only; auth/server is server-only. Don't aggregate.

src/layout/index.ts

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+// @gsc/web-kit/layout — Phase 1 stub. Real surface lands in later phases.
+export {};

src/navigation/index.ts

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+// @gsc/web-kit/navigation — Phase 1 stub. Real surface lands in later phases.
+export {};

src/shell/index.ts

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+// @gsc/web-kit/shell — Phase 1 stub. Real surface lands in later phases.
+export {};

src/shell/server.ts

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+// @gsc/web-kit/shell/server — Phase 1 stub. Real fetchShellConfig() lands in Phase 2.
+export {};

src/styles/index.css

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+/* @gsc/web-kit canonical stylesheet.
+ *
+ * Consumers should ALSO import (in this order, before this file):
+ *   import "bootstrap/dist/css/bootstrap.min.css";
+ *   import "@limitless/ui/css";
+ *   import "@gsc/web-kit/css";
+ *   import "@phosphor-icons/web/regular";
+ *
+ * The two sheets below own the layout-3 chrome (sidebar/page-content/
+ * navbar-footer rules and the JetBrains Mono font face). Bundlers
+ * inline them; the image refs in all.min.css resolve to ./images/
+ * relative to this file.
+ */
+
+@import "./all.min.css";
+@import "./sidebar-overrides.css";

src/styles/sidebar-overrides.css

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+@font-face {
+  font-family: "JetBrains Mono";
+  font-style: normal;
+  font-weight: 200;
+  font-display: swap;
+  src: url("https://assets.gosec.cloud/fonts/jetbrains/JetBrainsMono-ExtraLight.woff2") format("woff2");
+}
+
+@font-face {
+  font-family: "JetBrains Mono";
+  font-style: italic;
+  font-weight: 200;
+  font-display: swap;
+  src: url("https://assets.gosec.cloud/fonts/jetbrains/JetBrainsMono-ExtraLightItalic.woff2") format("woff2");
+}
+
+@font-face {
+  font-family: "JetBrains Mono";
+  font-style: normal;
+  font-weight: 300;
+  font-display: swap;
+  src: url("https://assets.gosec.cloud/fonts/jetbrains/JetBrainsMono-Light.woff2") format("woff2");
+}
+
+@font-face {
+  font-family: "JetBrains Mono";
+  font-style: italic;
+  font-weight: 300;
+  font-display: swap;
+  src: url("https://assets.gosec.cloud/fonts/jetbrains/JetBrainsMono-LightItalic.woff2") format("woff2");
+}
+
+@font-face {
+  font-family: "JetBrains Mono";
+  font-style: normal;
+  font-weight: 400;
+  font-display: swap;
+  src: url("https://assets.gosec.cloud/fonts/jetbrains/JetBrainsMono-Regular.woff2") format("woff2");
+}
+
+@font-face {
+  font-family: "JetBrains Mono";
+  font-style: italic;
+  font-weight: 400;
+  font-display: swap;
+  src: url("https://assets.gosec.cloud/fonts/jetbrains/JetBrainsMono-Italic.woff2") format("woff2");
+}
+
+@font-face {
+  font-family: "JetBrains Mono";
+  font-style: normal;
+  font-weight: 500;
+  font-display: swap;
+  src: url("https://assets.gosec.cloud/fonts/jetbrains/JetBrainsMono-Medium.woff2") format("woff2");
+}
+
+@font-face {
+  font-family: "JetBrains Mono";
+  font-style: italic;
+  font-weight: 500;
+  font-display: swap;
+  src: url("https://assets.gosec.cloud/fonts/jetbrains/JetBrainsMono-MediumItalic.woff2") format("woff2");
+}
+
+@font-face {
+  font-family: "JetBrains Mono";
+  font-style: normal;
+  font-weight: 600;
+  font-display: swap;
+  src: url("https://assets.gosec.cloud/fonts/jetbrains/JetBrainsMono-SemiBold.woff2") format("woff2");
+}
+
+@font-face {
+  font-family: "JetBrains Mono";
+  font-style: italic;
+  font-weight: 600;
+  font-display: swap;
+  src: url("https://assets.gosec.cloud/fonts/jetbrains/JetBrainsMono-SemiBoldItalic.woff2") format("woff2");
+}
+
+@font-face {
+  font-family: "JetBrains Mono";
+  font-style: normal;
+  font-weight: 700;
+  font-display: swap;
+  src: url("https://assets.gosec.cloud/fonts/jetbrains/JetBrainsMono-Bold.woff2") format("woff2");
+}
+
+@font-face {
+  font-family: "JetBrains Mono";
+  font-style: italic;
+  font-weight: 700;
+  font-display: swap;
+  src: url("https://assets.gosec.cloud/fonts/jetbrains/JetBrainsMono-BoldItalic.woff2") format("woff2");
+}
+
+@font-face {
+  font-family: "JetBrains Mono";
+  font-style: normal;
+  font-weight: 800;
+  font-display: swap;
+  src: url("https://assets.gosec.cloud/fonts/jetbrains/JetBrainsMono-ExtraBold.woff2") format("woff2");
+}
+
+@font-face {
+  font-family: "JetBrains Mono";
+  font-style: italic;
+  font-weight: 800;
+  font-display: swap;
+  src: url("https://assets.gosec.cloud/fonts/jetbrains/JetBrainsMono-ExtraBoldItalic.woff2") format("woff2");
+}
+
+body,
+html {
+  font-family: "JetBrains Mono", monospace !important;
+}
+
+:root {
+  --body-font-family: "JetBrains Mono", monospace;
+  --font-sans-serif: "JetBrains Mono", monospace;
+}
+
+.sidebar-main-resized .nav-sidebar > .nav-item > .nav-link,
+.sidebar-main-resized .nav-sidebar > .nav-item-submenu > .nav-link {
+  display: flex;
+  align-items: center;
+  justify-content: center !important;
+  padding-left: 0 !important;
+  padding-right: 0 !important;
+}
+
+.sidebar-main-resized .nav-sidebar > .nav-item > .nav-link i,
+.sidebar-main-resized .nav-sidebar > .nav-item-submenu > .nav-link i {
+  margin-top: 0 !important;
+  margin-bottom: 0 !important;
+  margin-left: 0 !important;
+  margin-right: 0 !important;
+  float: none !important;
+}
+
+.sidebar-main-resized .nav-item-submenu > .nav-link:after {
+  content: none !important;
+  display: none !important;
+}
+
+.sidebar-main-resized .nav-item-submenu {
+  position: relative;
+}
+
+.sidebar-main-resized .nav-item-submenu > .nav-group-sub.nav-group-sub-flyout {
+  position: absolute;
+  top: calc(var(--nav-link-padding-y) * -1);
+  left: 100%;
+  right: auto;
+  width: var(--ll-sidebar-width, 18.75rem);
+  background-color: var(--sidebar-bg, #fff);
+  border: 1px solid var(--border-color-translucent, #dee2e6);
+  box-shadow: var(--box-shadow, 0 0 1rem rgba(0, 0, 0, 0.15));
+  border-radius: var(--border-radius, 0.25rem);
+  padding-left: 0;
+  list-style: none;
+  display: none !important;
+  z-index: 1000;
+}
+
+.sidebar-main-resized
+  .nav-item-submenu
+  > .nav-group-sub.nav-group-sub-flyout[data-submenu-title]:before {
+  content: attr(data-submenu-title);
+  display: block;
+  padding: var(--nav-link-padding-y) var(--nav-link-padding-x);
+  padding-bottom: 0;
+  margin-top: var(--nav-link-padding-y);
+  opacity: 0.5;
+}
+
+.sidebar-main-resized
+  .nav-item-submenu.nav-group-sub-visible
+  > .nav-group-sub,
+.sidebar-main-resized
+  .nav-item-submenu:hover
+  > .nav-group-sub,
+.sidebar-main-resized
+  .nav-item-submenu:focus-within
+  > .nav-group-sub {
+  display: block !important;
+}

src/utils/index.ts

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+// @gsc/web-kit/utils — Phase 1 stub. Real surface lands in later phases.
+export {};