refactor!: delete legacy migration, dedup providers, unify defaults

CHANGELOG.md

@@ -7,6 +7,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+- **BREAKING: the built-in defaults now match `sumvox init`.** The default TTS chain is the platform's local engine (`macos` on macOS, `espeak` elsewhere) then `google` (voice `Aoede`, was `Zephyr`), and the Notification hook speaks through that local engine by default. `sumvox init` writes exactly these defaults. A config with no `[tts]` table, or no `[hooks.claude_code]` table, picks them up.
+- `--tts gemini` is now accepted as an alias for the `google` engine, matching the provider-name alias.
+- A set-but-empty `GEMINI_API_KEY` no longer hides `GOOGLE_API_KEY`.
+
+### Removed
+- **BREAKING: legacy `config.yaml` / `config.yml` / `config.json` are no longer read or migrated.** If one of them exists without a `config.toml`, sumvox now fails with an error telling you to convert it to `config.toml` or run `sumvox init`. `sumvox init` no longer treats them as an existing config.
+- The `TTS cost estimate` info log line is gone.
+
 ### Fixed
 - Over-long text for ElevenLabs and xAI TTS no longer crashes sumvox when it contains Chinese or other multi-byte characters; it is cut at a character boundary.
 - `--rate` is now optional: when omitted, the `rate` from your config (or the engine default) is used instead of being overwritten with 200.

Cargo.toml

@@ -16,9 +16,8 @@ tokio = { version = "1", features = ["rt-multi-thread", "macros", "fs", "io-util
 reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls", "charset", "http2", "macos-system-configuration"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
-serde_yaml = "0.9"
 toml = "0.8"
-chrono = { version = "0.4", features = ["serde"] }
+chrono = "0.4"
 thiserror = "1"
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
@@ -27,7 +26,7 @@ async-trait = "0.1"
 shellexpand = "3"
 clap = { version = "4", features = ["derive"] }
 base64 = "0.22"
-nix = { version = "0.29", features = ["fs", "process", "user"] }
+nix = { version = "0.29", features = ["fs", "user"] }
 rand = "0.8"
 jsonwebtoken = "9"
 

src/audio/file.rs

@@ -133,11 +133,6 @@ impl TtsProvider for AudioFileProvider {
 
         Ok(true)
     }
-
-    fn estimate_cost(&self, _char_count: usize) -> f64 {
-        // Audio file playback is free
-        0.0
-    }
 }
 
 #[cfg(test)]
@@ -156,7 +151,6 @@ mod tests {
         assert_eq!(provider.name(), "audio_file");
         assert_eq!(provider.volume, 80);
         assert!(matches!(provider.mode, AudioFileMode::SingleFile(_)));
-        assert_eq!(provider.estimate_cost(100), 0.0);
         assert!(provider.is_available());
         assert_eq!(provider.get_playback_file().unwrap(), temp_file.path());
     }