Implement the in-process structured entry editor

Closes #21

crates/storage/tests/password_generation.rs

@@ -131,6 +131,21 @@ fn deterministic_generation_uses_only_requested_characters_and_length() -> TestR
     Ok(())
 }
 
+#[test]
+fn in_process_generation_returns_a_zeroizing_unstored_secret() -> TestResult {
+    let config = GeneratorConfig::new(12, "abc123")?;
+    let generated = config.generate_secret(NonZeroUsize::new(48), false)?;
+    assert_eq!(generated.expose().len(), 48);
+    assert!(
+        generated
+            .expose()
+            .iter()
+            .all(|byte| b"abc123".contains(byte))
+    );
+    assert!(!format!("{generated:?}").contains(std::str::from_utf8(generated.expose())?));
+    Ok(())
+}
+
 #[test]
 fn default_no_symbols_and_presentation_actions_are_typed() -> TestResult {
     let fixture = FixtureSet::load()?;