feat(pwa): logicsrc credentials app — real auth + Turso, redesigned; retire commandboard-api credshare

Adds apps/pwa: an Express + libSQL/Turso app that is now the home of team
credential sharing, with the moshcode-style auth stack ported and reskinned to
match logicsrc.com (light theme, Inter, green accent).

apps/pwa
- auth: email/password (scrypt), passkeys (WebAuthn), CoinPay OAuth, cookie
  sessions, and lsk_ API keys for the CLI via a loopback OAuth-PKCE flow
  (/cli/authorize + /cli/token). Ported from the moshcode PWA.
- credshare API (/api/credshare/*): teams, members, invites, vaults, sealed
  grants, ciphertext secrets, audit — authed by session OR Bearer lsk_ key.
  Zero-knowledge: only ciphertext + sealed vault keys + public keys stored.
- teams dashboard, accept-invite, and settings (API keys) pages, server-rendered
  in the LogicSRC brand (lib/html.mjs).
- migrations (libSQL) 001_auth + 002_credshare, migrate-on-boot; Turso via
  TURSO_DATABASE_URL / TURSO_AUTH_TOKEN, or a local file db for dev.
- trimmed moshcode-specific approvals/credits/push/deliver.

CLI
- `logicsrc login` now does browser loopback OAuth-PKCE against the app and
  stores an lsk_ token (email-OTP removed); --token for CI. Client repointed.

Distribution
- install.sh (served at logicsrc.com/install.sh) installs the CLI from the
  GitHub repo: tarball -> npm install -> `npm run build:cli` -> logicsrc wrapper.
- root build:cli builds only the CLI's workspace chain (skips web/api/next).

Cleanup
- removed the commandboard-api credshare backend (superseded by the PWA) and its
  Supabase/Turso stores + libsql dep; commandboard-api tests green (40).
- removed the Next.js /teams page (the PWA is the web UI now).

Verified end-to-end: two accounts register on the PWA, mint lsk_ keys, CLI login
uploads identity keys, owner pushes an encrypted .env, teammate invited ->
accepted -> granted -> pulls the exact file. Server stores ciphertext only.
Full workspace build + tests green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/pwa/src/config.mjs

@@ -0,0 +1,64 @@
+// Central config. Reads .env (if present) with zero deps, then process.env wins.
+import fs from "node:fs";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const ROOT = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
+
+// Tiny .env loader — does not override anything already in the environment.
+function loadEnv() {
+  const file = path.join(ROOT, ".env");
+  if (!fs.existsSync(file)) return;
+  for (const line of fs.readFileSync(file, "utf8").split("\n")) {
+    const m = /^\s*([A-Z0-9_]+)\s*=\s*(.*)\s*$/i.exec(line);
+    if (!m) continue;
+    const key = m[1];
+    if (process.env[key] !== undefined) continue;
+    let val = m[2];
+    if ((val.startsWith('"') && val.endsWith('"')) || (val.startsWith("'") && val.endsWith("'"))) {
+      val = val.slice(1, -1);
+    }
+    process.env[key] = val;
+  }
+}
+loadEnv();
+
+const origin = (process.env.PUBLIC_ORIGIN || `http://localhost:${process.env.PORT || 8080}`).replace(/\/+$/, "");
+const rpID = new URL(origin).hostname;
+
+export const config = {
+  root: ROOT,
+  env: process.env.NODE_ENV || "development",
+  port: Number(process.env.PORT || 8080),
+  origin,
+  // WebAuthn relying party = this host.
+  rpID,
+  rpName: "LogicSRC",
+  sessionSecret: process.env.SESSION_SECRET || "dev-insecure-secret-change-me",
+  db: {
+    // Turso (libSQL) in prod; a local file for dev. TURSO_* takes precedence.
+    url: process.env.TURSO_DATABASE_URL || process.env.DATABASE_URL || "file:./data/local.db",
+    authToken: process.env.TURSO_AUTH_TOKEN || process.env.DATABASE_AUTH_TOKEN || undefined,
+  },
+  resend: {
+    apiKey: process.env.RESEND_API_KEY || "",
+    from: process.env.CREDSHARE_EMAIL_FROM || process.env.RESEND_FROM || "LogicSRC <noreply@logicsrc.com>",
+  },
+  coinpay: {
+    apiBase: (process.env.COINPAY_API_BASE || "https://coinpayportal.com").replace(/\/+$/, ""),
+    businessId: process.env.COINPAY_BUSINESS_ID || "",
+    webhookSecret: process.env.COINPAY_WEBHOOK_SECRET || "",
+    oauth: {
+      authorizeUrl: process.env.COINPAY_OAUTH_AUTHORIZE_URL || "",
+      tokenUrl: process.env.COINPAY_OAUTH_TOKEN_URL || "",
+      userinfoUrl: process.env.COINPAY_OAUTH_USERINFO_URL || "",
+      clientId: process.env.COINPAY_OAUTH_CLIENT_ID || "",
+      redirectUri: `${origin}/auth/coinpay/callback`,
+      scope: process.env.COINPAY_OAUTH_SCOPE || "openid profile",
+    },
+  },
+  get coinpayLoginEnabled() {
+    return Boolean(this.coinpay.oauth.authorizeUrl && this.coinpay.oauth.clientId);
+  },
+  secure: (process.env.NODE_ENV || "development") === "production",
+};