Loading applied the template to the live session but never wrote the active config file,
which made "switch live" only half true:

- the launcher starts the tool with --config <out_dir>/township_config.json, so the
  template silently reverted on the next restart;
- _ref_gen_res_steps deliberately RE-READS that file from disk for keyframe_size and
  keyframe_steps (so Run-page edits apply without a restart), which meant those two
  options came from the stale file even in the same session — the loaded template
  disagreeing with itself.

The load now writes the active config too, reports the path back as `persisted`, and says
so in the log if the write fails rather than leaving a switch that looks applied and
reverts later.

Verified live: save a template with keyframe_size 1024x576, load it, and the active
config file on disk carries it.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0182DhR1eFNPQyGmDrpHbedY