perf(deps): make prometheus and TUI onboarding opt-in, not default

Move observability-prometheus out of default features and
tui-onboarding out of agent-runtime. Both remain available via
explicit --features flags and are included in ci-all.

- Removes observability-prometheus from root and runtime default features
- Removes tui-onboarding and dep:ratatui/dep:crossterm from agent-runtime
- Adds tui-onboarding to ci-all for full CI coverage
- Moves run_tui_if_enabled fallback before test module (fixes clippy)

Binary size (default features): 13,323,664 → 13,090,384 (~228KB / 12MB).
First time below 13MB on default features.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ArgenisDLR

Cargo.toml

@@ -227,7 +227,6 @@ libc = "0.2"
 [features]
 default = [
     "agent-runtime",
-    "observability-prometheus",
     "schema-export",
 ]
 
@@ -237,13 +236,12 @@ agent-runtime = [
     "dep:zeroclaw-runtime", "dep:zeroclaw-channels", "dep:zeroclaw-tools",
     "dep:rusqlite",
     "dep:ring", "dep:lru", "dep:chrono-tz", "dep:cron", "dep:glob", "dep:which",
-    "dep:ratatui", "dep:crossterm",
     "dep:tokio-tungstenite", "dep:tokio-socks", "dep:hostname",
     "dep:rustls", "dep:rustls-pemfile", "dep:rustls-pki-types", "dep:tokio-rustls", "dep:webpki-roots",
     "dep:lettre", "dep:mail-parser", "dep:async-imap",
     "dep:axum", "dep:hyper", "dep:hyper-util", "dep:tower", "dep:tower-http", "dep:http-body-util",
     "dep:mime_guess",
-    "gateway", "tui-onboarding",
+    "gateway",
     "channel-email", "channel-telegram", "channel-lark",
     "channel-discord", "channel-slack", "channel-signal",
     "channel-mattermost", "channel-irc", "channel-imessage",
@@ -312,7 +310,7 @@ metrics = ["observability-prometheus"]
 
 # CI meta-feature
 ci-all = [
-    "agent-runtime",
+    "agent-runtime", "tui-onboarding",
     "channel-nostr", "channel-matrix", "whatsapp-web",
     "observability-prometheus", "observability-otel",
     "hardware", "peripheral-rpi",

crates/zeroclaw-runtime/Cargo.toml

@@ -87,7 +87,7 @@ libc = "0.2"
 pdf-extract = { version = "0.10", optional = true }
 
 [features]
-default = ["observability-prometheus", "schema-export"]
+default = ["schema-export"]
 observability-prometheus = ["dep:prometheus"]
 observability-otel = ["dep:opentelemetry", "dep:opentelemetry_sdk", "dep:opentelemetry-otlp"]
 sandbox-landlock = ["dep:landlock"]

src/main.rs

@@ -3311,6 +3311,12 @@ async fn run_tui_if_enabled() -> anyhow::Result<()> {
     Box::pin(tui::run_tui_onboarding()).await
 }
 
+#[cfg(not(feature = "tui-onboarding"))]
+#[allow(clippy::unused_async)]
+async fn run_tui_if_enabled() -> anyhow::Result<()> {
+    anyhow::bail!("TUI onboarding feature is not enabled. Rebuild with --features tui-onboarding")
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -3564,9 +3570,3 @@ mod tests {
         assert!((final_temperature - 0.7).abs() < f64::EPSILON);
     }
 }
-
-#[cfg(not(feature = "tui-onboarding"))]
-#[allow(clippy::unused_async)]
-async fn run_tui_if_enabled() -> anyhow::Result<()> {
-    anyhow::bail!("TUI onboarding feature is not enabled. Rebuild with --features tui-onboarding")
-}