feat: add activity tracking and multiline output support

Cargo.toml

@@ -34,3 +34,6 @@ tree-sitter-javascript = "0.23"
 default = ["tui", "self-update", "dirs"]
 tui = ["ratatui", "crossterm", "ansi_term", "ansi-to-tui", "chrono"]
 self-update = ["ureq", "semver", "chrono", "dirs"]
+
+[dev-dependencies]
+tempfile = "3.10"

src/cli.rs

@@ -31,6 +31,10 @@ pub struct Cli {
     /// Patch Claude Code cli.js to disable context warnings
     #[arg(long = "patch")]
     pub patch: Option<String>,
+
+    /// Enable multiline output with activity tracking (agents/tools lines)
+    #[arg(short = 'm', long = "multiline")]
+    pub multiline: bool,
 }
 
 impl Cli {

src/config/types.rs

@@ -73,6 +73,7 @@ pub enum SegmentId {
     Session,
     OutputStyle,
     Update,
+    ConfigCounts,
 }
 
 // Legacy compatibility structure
@@ -85,14 +86,17 @@ pub struct SegmentsConfig {
 }
 
 // Data structures compatible with existing main.rs
-#[derive(Deserialize)]
+#[derive(Deserialize, Default)]
 pub struct Model {
+    #[serde(default)]
     pub id: String,
+    #[serde(default)]
     pub display_name: String,
 }
 
-#[derive(Deserialize)]
+#[derive(Deserialize, Default)]
 pub struct Workspace {
+    #[serde(default)]
     pub current_dir: String,
 }
 
@@ -110,10 +114,13 @@ pub struct OutputStyle {
     pub name: String,
 }
 
-#[derive(Deserialize)]
+#[derive(Deserialize, Default)]
 pub struct InputData {
+    #[serde(default)]
     pub model: Model,
+    #[serde(default)]
     pub workspace: Workspace,
+    #[serde(default)]
     pub transcript_path: String,
     pub cost: Option<Cost>,
     pub output_style: Option<OutputStyle>,