feat(gemini-cli): add multi-project support and enhance credential handling

Introduce support for multi-project Gemini CLI logins, including shared and virtual credential management. Enhance runtime, metadata handling, and token updates for better project granularity and consistency across virtual and shared credentials. Extend onboarding to allow activating all available projects.

internal/runtime/geminicli/state.go

@@ -0,0 +1,144 @@
+package geminicli
+
+import (
+	"strings"
+	"sync"
+)
+
+// SharedCredential keeps canonical OAuth metadata for a multi-project Gemini CLI login.
+type SharedCredential struct {
+	primaryID  string
+	email      string
+	metadata   map[string]any
+	projectIDs []string
+	mu         sync.RWMutex
+}
+
+// NewSharedCredential builds a shared credential container for the given primary entry.
+func NewSharedCredential(primaryID, email string, metadata map[string]any, projectIDs []string) *SharedCredential {
+	return &SharedCredential{
+		primaryID:  strings.TrimSpace(primaryID),
+		email:      strings.TrimSpace(email),
+		metadata:   cloneMap(metadata),
+		projectIDs: cloneStrings(projectIDs),
+	}
+}
+
+// PrimaryID returns the owning credential identifier.
+func (s *SharedCredential) PrimaryID() string {
+	if s == nil {
+		return ""
+	}
+	return s.primaryID
+}
+
+// Email returns the associated account email.
+func (s *SharedCredential) Email() string {
+	if s == nil {
+		return ""
+	}
+	return s.email
+}
+
+// ProjectIDs returns a snapshot of the configured project identifiers.
+func (s *SharedCredential) ProjectIDs() []string {
+	if s == nil {
+		return nil
+	}
+	return cloneStrings(s.projectIDs)
+}
+
+// MetadataSnapshot returns a deep copy of the stored OAuth metadata.
+func (s *SharedCredential) MetadataSnapshot() map[string]any {
+	if s == nil {
+		return nil
+	}
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return cloneMap(s.metadata)
+}
+
+// MergeMetadata merges the provided fields into the shared metadata and returns an updated copy.
+func (s *SharedCredential) MergeMetadata(values map[string]any) map[string]any {
+	if s == nil {
+		return nil
+	}
+	if len(values) == 0 {
+		return s.MetadataSnapshot()
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if s.metadata == nil {
+		s.metadata = make(map[string]any, len(values))
+	}
+	for k, v := range values {
+		if v == nil {
+			delete(s.metadata, k)
+			continue
+		}
+		s.metadata[k] = v
+	}
+	return cloneMap(s.metadata)
+}
+
+// SetProjectIDs updates the stored project identifiers.
+func (s *SharedCredential) SetProjectIDs(ids []string) {
+	if s == nil {
+		return
+	}
+	s.mu.Lock()
+	s.projectIDs = cloneStrings(ids)
+	s.mu.Unlock()
+}
+
+// VirtualCredential tracks a per-project virtual auth entry that reuses a primary credential.
+type VirtualCredential struct {
+	ProjectID string
+	Parent    *SharedCredential
+}
+
+// NewVirtualCredential creates a virtual credential descriptor bound to the shared parent.
+func NewVirtualCredential(projectID string, parent *SharedCredential) *VirtualCredential {
+	return &VirtualCredential{ProjectID: strings.TrimSpace(projectID), Parent: parent}
+}
+
+// ResolveSharedCredential returns the shared credential backing the provided runtime payload.
+func ResolveSharedCredential(runtime any) *SharedCredential {
+	switch typed := runtime.(type) {
+	case *SharedCredential:
+		return typed
+	case *VirtualCredential:
+		return typed.Parent
+	default:
+		return nil
+	}
+}
+
+// IsVirtual reports whether the runtime payload represents a virtual credential.
+func IsVirtual(runtime any) bool {
+	if runtime == nil {
+		return false
+	}
+	_, ok := runtime.(*VirtualCredential)
+	return ok
+}
+
+func cloneMap(in map[string]any) map[string]any {
+	if len(in) == 0 {
+		return nil
+	}
+	out := make(map[string]any, len(in))
+	for k, v := range in {
+		out[k] = v
+	}
+	return out
+}
+
+func cloneStrings(in []string) []string {
+	if len(in) == 0 {
+		return nil
+	}
+	out := make([]string, len(in))
+	copy(out, in)
+	return out
+}