feat(desktop): import local Pocket voices

Cargo.toml

@@ -26,6 +26,7 @@ members = [
     "crates/buzz-pair-relay",
     "crates/buzz-relay-mesh",
     "crates/buzz-dev-mcp",
+    "crates/buzz-voice",
     "examples/countdown-bot",
 ]
 exclude = ["desktop/src-tauri"]

Justfile

@@ -276,6 +276,7 @@ test-unit:
     #!/usr/bin/env bash
     if command -v cargo-nextest &>/dev/null; then
         cargo nextest run -p buzz-core -p buzz-auth --lib
+        cargo nextest run -p buzz-voice --lib
         # buzz-db migrator/lint tests: pure SQL-parsing unit tests (no infra).
         # They guard the embedded-migrator invariant (exactly the consolidated
         # 0001; cutover/backfill stays an operator script, not startup state)

crates/buzz-voice/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "buzz-voice"
+version.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+license.workspace = true
+repository.workspace = true
+description = "Reusable local voice primitives for Buzz"
+
+[dependencies]
+atomic-write-file = "0.3"
+hex = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+sha2 = { workspace = true }
+sherpa-onnx = "1.12"
+
+[dev-dependencies]
+tempfile = "3"
+
+[target.'cfg(target_os = "macos")'.dev-dependencies]
+cpal = "0.17"