v0.4.0: Message navigation and expand/collapse

- Page Up/Down navigates between messages in preview
- Focus indicator (▎) shows selected message
- Space bar toggles expand/collapse of focused message
- Mouse click selects message, double-click expands/collapses
- Dynamic expand/collapse label in status bar

Author: zippoxer

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "recall"
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 description = "Search and resume Claude Code and Codex CLI conversations"
 

Cargo.toml

@@ -623,6 +623,11 @@ mod tests {
     /// Create a minimal App for testing navigation/expansion features
     /// This bypasses the index initialization for unit tests
     fn test_app() -> App {
+        use std::sync::atomic::{AtomicUsize, Ordering};
+        static TEST_COUNTER: AtomicUsize = AtomicUsize::new(0);
+        let test_id = TEST_COUNTER.fetch_add(1, Ordering::SeqCst);
+        let index_path = std::env::temp_dir().join(format!("recall_test_index_{}", test_id));
+
         App {
             query: String::new(),
             cursor: 0,
@@ -641,7 +646,7 @@ mod tests {
             should_quit: false,
             should_resume: None,
             should_copy: None,
-            index: SessionIndex::open_or_create(&std::env::temp_dir().join("recall_test_index")).unwrap(),
+            index: SessionIndex::open_or_create(&index_path).unwrap(),
             status: None,
             total_sessions: 0,
             index_rx: None,