2.19.0

Added

• CodeGem, a native Python harness dedicated to Gemini and Gemma coding, with
  six bounded tools, Gemini-native conversation handling, and Gemma tool-call
  capability detection plus a validated JSON fallback.
• Optional local EmbeddingGemma semantic code search and reproducible setup,
  cross-runtime validation, and benchmark guides for Ollama, LM Studio, and
  llama.cpp.
• Installed superqode-codegem-index and superqode-codegem-download commands
  for local retrieval and verified model downloads without a source checkout.
• CodeGem quick starts, model/runtime configuration guidance, transparent
  evaluation notes, and catalog metadata for first-time users.

Changed

• Use the cross-platform Ollama gemma4:12b model in the CodeGem example;
  Apple Silicon users can select the MLX-specific tag when it is available.

Fixed

• Preserve source-view scroll position across file reloads, theme refreshes,
  and workspace resize events.