Refactor scrolling methods in ScrollState to accept an amount parameter

- Updated `scroll_up` and `scroll_down` methods to take an `amount` parameter for more flexible scrolling.
- Removed the `AgentMode` enum and related methods from the types module to simplify state management.
- Modified `AppStateRest` to remove the `mode` field and adjusted related logic.
- Enhanced `run_subagent` to build tool definitions and handle API key resolution from configuration.
- Updated command parsing to reflect changes in login handling.
- Removed onboarding overlays and related logic from input handling and rendering.
- Improved status bar to reflect connection status and agent readiness.
- Adjusted workflow panel rendering to simplify phase status display.
- Refactored edit log initialization to load from disk if available.
- Updated settings structure to use a HashMap for API keys.
- Enhanced error handling in LlmClient for authentication issues.

src/model/editlog.rs

@@ -20,10 +20,24 @@ pub struct EditLog {
 
 impl EditLog {
     pub fn new(session_dir: &std::path::Path) -> Self {
-        EditLog {
-            entries: Vec::new(),
-            path: session_dir.join("edits.jsonl"),
-        }
+        let path = session_dir.join("edits.jsonl");
+        let entries = Self::load_from_disk(&path);
+        EditLog { entries, path }
+    }
+
+    /// Reads every line of edits.jsonl back into memory so callers who create a
+    /// *new* EditLog after a previous session can inspect the full history.
+    fn load_from_disk(path: &std::path::Path) -> Vec<EditLogEntry> {
+        let file = match std::fs::File::open(path) {
+            Ok(f) => f,
+            Err(_) => return Vec::new(),
+        };
+        use std::io::{BufRead, BufReader};
+        let reader = BufReader::new(file);
+        reader
+            .lines()
+            .filter_map(|line| line.ok().and_then(|l| serde_json::from_str(&l).ok()))
+            .collect()
     }
 
     pub fn append(&mut self, entry: EditLogEntry) -> std::io::Result<()> {