smcli: self-healing sessions — refresh-token grant + auto-relogin

Vault access tokens expire (~10min); consumers hit 401s after container
recreates. Now: refresh_token persisted at login and rotated on every
refresh (Vaultwarden semantics); 401 on an authed call refreshes once
and retries; if refresh is unavailable, full relogin (password+TOTP
injected by the sm shims from the TSGCOO vault-account env) is attempted
before failing. cmdLogin passes the TOTP seed again (regression).
QA: corrupted access_token -> TSGCOO sm read self-healed end-to-end.
Ticket: https://projects.knownelement.com/issues/832

cli/cmd/smcli/api.go

@@ -17,10 +17,12 @@ import (
 )
 
 type Client struct {
-	Server   string // e.g. https://pwvault.turnsys.com
-	HTTP     *http.Client
-	Email    string
-	Password string
+	Server      string // e.g. https://pwvault.turnsys.com
+	HTTP        *http.Client
+	Email       string
+	Password    string
+	TOTPSecret  string
+	reloginDone bool
 
 	AccessToken  string
 	RefreshToken string
@@ -180,7 +182,7 @@ func (c *Client) Login() error {
 	if t.AccessToken == "" {
 		// 2FA retry path (provider 0 = authenticator TOTP)
 		if strings.Contains(string(out), "Two factor required") {
-			secret := os.Getenv("SM_TOTP_SECRET")
+			secret := c.TOTPSecret
 			if secret != "" {
 				code, terr := totpNow(secret, time.Now())
 				if terr != nil {
@@ -327,3 +329,31 @@ func (c *Client) DeleteCipher(id string) error {
 	_, _ = c.api("PUT", "/api/ciphers/"+id+"/purge", map[string]any{}, true)
 	return nil
 }
+
+// selfRelogin performs the full login+unlock using SM_* env credentials
+// (injected by the sm shims from the TSGCOO vault-account env). Saves state.
+func (c *Client) selfRelogin() error {
+	if c.Password == "" {
+		c.Password = os.Getenv("SM_PASSWORD")
+	}
+	if c.TOTPSecret == "" {
+		c.TOTPSecret = os.Getenv("SM_TOTP_SECRET")
+	}
+	if c.Password == "" {
+		return errors.New("relogin unavailable: SM_PASSWORD not set")
+	}
+	if err := c.Login(); err != nil {
+		return err
+	}
+	if err := c.Unlock(); err != nil {
+		return err
+	}
+	if s, err := loadState(); err == nil {
+		s.AccessToken = c.AccessToken
+		s.UserSymKey = toHex(c.UserSymKey)
+		s.StretchedKey = toHex(c.StretchedKey)
+		s.MasterKey = toHex(c.MasterKey)
+		_ = saveState(s)
+	}
+	return nil
+}