Remove dead code, secure debug endpoints, fix encapsulation

internal/auth/types.go

@@ -7,22 +7,15 @@ import (
 
 // Credential represents an Anthropic API credential loaded from a JSON file.
 type Credential struct {
-	ID                string
-	Email             string
-	AccessToken       string
-	RefreshToken      string
-	ExpiresAt         time.Time
-	FilePath          string
-	CooldownUntil     time.Time
-	nextRefreshAfter  time.Time
-	mu                sync.Mutex
-}
-
-// IsExpired returns true if the credential's access token has expired.
-func (c *Credential) IsExpired() bool {
-	c.mu.Lock()
-	defer c.mu.Unlock()
-	return time.Now().After(c.ExpiresAt)
+	ID               string
+	Email            string
+	AccessToken      string
+	RefreshToken     string
+	ExpiresAt        time.Time
+	FilePath         string
+	CooldownUntil    time.Time
+	nextRefreshAfter time.Time
+	mu               sync.Mutex
 }
 
 // IsOnCooldown returns true if the credential is currently on cooldown.
@@ -39,6 +32,13 @@ func (c *Credential) SetCooldown(duration time.Duration) {
 	c.CooldownUntil = time.Now().Add(duration)
 }
 
+// ClearCooldown removes any active cooldown on the credential.
+func (c *Credential) ClearCooldown() {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	c.CooldownUntil = time.Time{}
+}
+
 // Token returns the current access token.
 func (c *Credential) Token() string {
 	c.mu.Lock()