console: sync the registration wizard and issue real API tokens

Mirror the Console registration feature: native hook catalog with
activation plans, one-command install that embeds both credentials in
exclusively created owner-only files (mktemp on POSIX, icacls on
Windows), sh/PowerShell tabs, never-expiring default token, focus-visible
styles, merged i18n keys, and the matching e2e specs.

The server previously answered /v1/auth/token with the 7-day Better Auth
session token and ignored ttl_seconds. It now issues opaque 32-byte API
tokens stored as SHA-256 hashes (migration 003), honours ttl_seconds with
null meaning no expiry, and resolves bearer values as API tokens before
session validation. Issuance requires a session credential.

Claude-Session: https://claude.ai/code/session_01QoUjdc7HGKTsgj5GhG8HvF

packages/server/migrations/003_api_tokens.sql

@@ -0,0 +1,24 @@
+-- Opaque API tokens stored as SHA-256 hashes.
+
+BEGIN;
+
+CREATE TABLE IF NOT EXISTS api_tokens (
+  token_id   TEXT   NOT NULL PRIMARY KEY,
+  user_id    TEXT   NOT NULL REFERENCES users (user_id),
+  org_id     TEXT   NOT NULL REFERENCES organizations (org_id),
+  token_hash TEXT   NOT NULL UNIQUE,
+  issued_at  BIGINT NOT NULL,
+  expires_at BIGINT
+);
+
+CREATE INDEX IF NOT EXISTS idx_api_tokens_user_id ON api_tokens (user_id);
+
+INSERT INTO schema_versions (version, applied_at, description)
+VALUES (
+  3,
+  EXTRACT(EPOCH FROM NOW())::BIGINT * 1000,
+  'Opaque API tokens'
+)
+ON CONFLICT (version) DO NOTHING;
+
+COMMIT;