Apply Application Env Secrets

Apply the application’s stored environment secrets to what is already running: re-seal them into the Secrets the manifests read on every deployment and roll the workloads that read them. An application whose last key has been cleared applies too, and the apply then removes the sealed Secret from the deployment’s stack and rolls the workloads off those values - without it, every reconcile put the deleted values back. The values only reach a running workload at deploy time otherwise, so this is the explicit one-click close of that gap - it is never triggered implicitly by setting a value. It takes no body (the values it applies are the ones already stored) and returns none. The deploy parameters of each deployment are left untouched: only the environment-secret manifest and the pod templates that read it are written. A browser session twin is mounted at the same path without the /api/v1 prefix (cookie authentication plus the X-Ankra-CSRF double-submit header). With environment_id, resolve or modify only that environment; deletion suppresses a shared default locally, and apply never changes another target. Without it, existing shared catalogue behaviour is retained; all-target apply still preserves environment overrides.