Initial open-source release (MIT): image2api AI gateway

Full Go backend + Vue 3 frontend, OpenAI-compatible API, multi-provider
account pools, billing/admin, Docker one-command deploy with auto HTTPS.

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

backend/internal/provider/adobe/auth.go

@@ -0,0 +1,39 @@
+package adobe
+
+import (
+	"context"
+	"errors"
+	"net/http"
+	"strings"
+)
+
+const (
+	refreshURL = "https://adobeid-na1.services.adobe.com/ims/check/v6/token?jslVersion=v2-v0.48.0-1-g1e322cb"
+	clientID   = "clio-playground-web"
+	scopeValue = "AdobeID,firefly_api,openid,pps.read,pps.write,additional_info.projectedProductContext,additional_info.ownerOrg,uds_read,uds_write,ab.manage,read_organizations,additional_info.roles,account_cluster.read,creative_production,profile"
+)
+
+var ErrAdobeCookieEmpty = errors.New("cookie is empty")
+
+type CookieExchangeResult struct {
+	AccessToken string
+	ExpiresIn   int
+	Raw         map[string]any
+}
+
+func ExchangeCookieToAccessToken(ctx context.Context, client *http.Client, cookie string) (*CookieExchangeResult, error) {
+	_ = client
+	tlsClient, err := NewClient(clientID, "").newTLSClient()
+	if err != nil {
+		return nil, err
+	}
+	return exchangeCookieWithTLSClient(ctx, tlsClient, cookie)
+}
+
+func normalizeCookie(v string) string {
+	v = strings.TrimSpace(v)
+	if strings.HasPrefix(strings.ToLower(v), "cookie:") {
+		v = strings.TrimSpace(v[len("cookie:"):])
+	}
+	return v
+}