Enable pst feature by default; readpst is shelled out to, no crate dependency

src-tauri/Cargo.toml

@@ -54,7 +54,7 @@ windows = { version = "0.58", features = [
 wasapi = { version = "0.15", optional = true }             # Phase 1
 
 [features]
-default = ["audio", "cpu-transcription", "diarization"]
+default = ["audio", "cpu-transcription", "diarization", "pst"]
 # Phase 1
 audio = ["dep:wasapi", "dep:hound"]
 cpu-transcription = ["dep:whisper-rs"]   # whisper-rs CPU build
@@ -64,7 +64,7 @@ vulkan = ["whisper-rs?/vulkan"] # whisper.cpp Vulkan
 directml = []                   # ort + DirectML NPU path (T3.4, not yet implemented)
 # Phase 4 / 6 (added when integrated)
 diarization = ["dep:sherpa-rs"] # sherpa-onnx
-pst = []                        # outlook-pst
+pst = []                        # shells out to readpst (libpst) — no crate dep, see ADR-0008 update
 # Phase 9
 sync = ["dep:keyring"]          # remote upload (WebDAV + OAuth providers)
 # Phase 10