feat(nothooks): add phase-aware hook runner with setup-hook state tracking

crates/nothooks/src/state.rs

@@ -0,0 +1,36 @@
+use std::collections::HashSet;
+use std::path::Path;
+use anyhow::Result;
+use serde::{Deserialize, Serialize};
+
+const STATE_FILE: &str = ".nothooks-state.toml";
+
+#[derive(Debug, Default, Serialize, Deserialize)]
+pub struct HookState {
+    pub completed_setup_hooks: HashSet<String>,
+}
+
+impl HookState {
+    pub fn load(dir: &Path) -> Result<Self> {
+        let path = dir.join(STATE_FILE);
+        if !path.exists() {
+            return Ok(Self::default());
+        }
+        let content = std::fs::read_to_string(&path)?;
+        Ok(toml::from_str(&content)?)
+    }
+
+    pub fn save(&self, dir: &Path) -> Result<()> {
+        let path = dir.join(STATE_FILE);
+        std::fs::write(path, toml::to_string(self)?)?;
+        Ok(())
+    }
+
+    pub fn mark_done(&mut self, name: &str) {
+        self.completed_setup_hooks.insert(name.to_string());
+    }
+
+    pub fn is_done(&self, name: &str) -> bool {
+        self.completed_setup_hooks.contains(name)
+    }
+}