Implement core speech-to-text pipeline

All major components: hotkey listener (rdev), audio capture (cpal),
resampling (rubato), VAD (Silero ONNX), Parakeet v3 TDT transcription
(ort), overlay window (winit+softbuffer), paste simulation (enigo+arboard),
audio feedback (rodio), YAML config, CLI with clap, HuggingFace model
download. ~2400 lines of Rust across 16 source files.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/main.rs

@@ -0,0 +1,82 @@
+mod audio_feedback;
+mod cli;
+mod config;
+mod coordinator;
+mod hotkey;
+mod model_cache;
+mod overlay;
+mod paste;
+mod recorder;
+mod transcriber;
+mod vad;
+
+use clap::{Parser, Subcommand};
+
+#[derive(Parser)]
+#[command(name = "mouth", version, about = "Offline speech-to-text with global hotkey and paste")]
+struct Cli {
+    #[command(subcommand)]
+    command: Option<Commands>,
+}
+
+#[derive(Subcommand)]
+enum Commands {
+    /// Start the mouth daemon
+    Run,
+
+    /// View or edit configuration
+    Config {
+        /// Print current config to stdout
+        #[arg(long)]
+        show: bool,
+
+        /// Reset config to defaults
+        #[arg(long)]
+        reset: bool,
+    },
+
+    /// Manage speech-to-text models
+    Models {
+        /// Download the configured model
+        #[arg(long)]
+        download: bool,
+    },
+
+    /// Show daemon status, loaded model, and version
+    Status,
+}
+
+fn main() -> anyhow::Result<()> {
+    tracing_subscriber::fmt()
+        .with_env_filter(
+            tracing_subscriber::EnvFilter::try_from_default_env()
+                .unwrap_or_else(|_| tracing_subscriber::EnvFilter::new("info")),
+        )
+        .init();
+
+    let cli = Cli::parse();
+
+    match cli.command {
+        None | Some(Commands::Run) => cli::run_cmd::run(),
+
+        Some(Commands::Config { show, reset }) => {
+            if show {
+                cli::config_cmd::show()
+            } else if reset {
+                cli::config_cmd::reset()
+            } else {
+                cli::config_cmd::interactive()
+            }
+        }
+
+        Some(Commands::Models { download }) => {
+            if download {
+                cli::models_cmd::download()
+            } else {
+                cli::models_cmd::list()
+            }
+        }
+
+        Some(Commands::Status) => cli::status_cmd::status(),
+    }
+}