Add JSON popup for viewing pretty-printed logs.

src/app/clipboard.rs

@@ -73,6 +73,10 @@ mod tests {
             status_message: None,
             status_set_at: None,
 
+            // JSON popup defaults
+            json_popup_open: false,
+            json_popup_content: String::new(),
+
             saved_filters: Vec::new(),
             save_filter_popup_open: false,
             save_filter_name: String::new(),

src/app/filters.rs

@@ -232,6 +232,10 @@ mod tests {
             status_message: None,
             status_set_at: None,
 
+            // JSON popup defaults
+            json_popup_open: false,
+            json_popup_content: String::new(),
+
             saved_filters: Vec::new(),
             save_filter_popup_open: false,
             save_filter_name: String::new(),

src/app/keymap.rs

@@ -21,6 +21,17 @@ impl App {
             return Ok(());
         }
 
+        // JSON popup has highest priority once open.
+        if self.json_popup_open {
+            match key_event.code {
+                KeyCode::Esc | KeyCode::Char('q') => {
+                    self.close_json_popup();
+                }
+                _ => {}
+            }
+            return Ok(());
+        }
+
         match key_event.code {
             // q should NOT quit while editing or while group search is active
             KeyCode::Char('q') if !self.editing && !self.group_search_active => {
@@ -149,6 +160,19 @@ impl App {
                 self.copy_results_to_clipboard();
             }
 
+            // Open JSON popup for current Results line (Results pane, not editing)
+            KeyCode::Char('j') if !self.editing && self.focus == Focus::Results => {
+                if let Some(line) = self.lines.get(self.results_scroll).cloned() {
+                    // Heuristic: try to find a JSON object/array starting point
+                    let msg_part = line
+                        .find('{')
+                        .or_else(|| line.find('['))
+                        .map(|idx| &line[idx..])
+                        .unwrap_or(line.as_str());
+                    self.open_json_popup(msg_part);
+                }
+            }
+
             // Toggle tail mode
             KeyCode::Char('t') if !self.editing && !self.group_search_active => {
                 self.tail_mode = !self.tail_mode;
@@ -252,6 +276,10 @@ mod tests {
             status_message: None,
             status_set_at: None,
 
+            // JSON popup defaults
+            json_popup_open: false,
+            json_popup_content: String::new(),
+
             saved_filters: Vec::new(),
             save_filter_popup_open: false,
             save_filter_name: String::new(),

src/app/mod.rs

@@ -80,6 +80,10 @@ pub struct App {
     pub status_message: Option<String>,
     pub status_set_at: Option<Instant>,
 
+    // JSON popup state for viewing pretty-printed JSON logs
+    pub json_popup_open: bool,
+    pub json_popup_content: String,
+
     pub saved_filters: Vec<SavedFilter>,
 
     pub save_filter_popup_open: bool,
@@ -90,6 +94,29 @@ pub struct App {
 }
 
 impl App {
+    /// Open the JSON popup with pretty-printed content, if `raw` parses as JSON.
+    /// Falls back to the original string on parse/format errors.
+    pub fn open_json_popup(&mut self, raw: &str) {
+        // Try to parse as JSON first
+        if let Ok(value) = serde_json::from_str::<serde_json::Value>(raw) {
+            if let Ok(pretty) = serde_json::to_string_pretty(&value) {
+                self.json_popup_content = pretty;
+            } else {
+                self.json_popup_content = raw.to_string();
+            }
+        } else {
+            // Not valid JSON; just show the raw string
+            self.json_popup_content = raw.to_string();
+        }
+        self.json_popup_open = true;
+    }
+
+    /// Close the JSON popup, if open.
+    pub fn close_json_popup(&mut self) {
+        self.json_popup_open = false;
+        self.json_popup_content.clear();
+    }
+
     pub fn run(&mut self, terminal: &mut DefaultTerminal) -> io::Result<()> {
         while !self.exit {
             if self.focus == Focus::Filter && self.editing {
@@ -530,6 +557,9 @@ mod tests {
             status_message: None,
             status_set_at: None,
 
+            json_popup_open: false,
+            json_popup_content: String::new(),
+
             saved_filters: Vec::new(),
             save_filter_popup_open: false,
             save_filter_name: String::new(),

src/main.rs

@@ -68,6 +68,8 @@ fn main() -> io::Result<()> {
         status_message: None,
         status_set_at: None,
 
+        json_popup_open: false,
+        json_popup_content: String::new(),
         saved_filters: Vec::new(),
         save_filter_popup_open: false,
         save_filter_name: String::new(),

src/ui/mod.rs

@@ -213,6 +213,49 @@ impl Widget for &App {
         // Call the refactored renderer
         self.render_results(results_inner, buf);
 
+        // JSON popup overlay (on top of main UI)
+        if self.json_popup_open {
+            // Centered popup: 70% width and height
+            let popup_area = Layout::vertical([
+                Constraint::Percentage(15),
+                Constraint::Percentage(70),
+                Constraint::Percentage(15),
+            ])
+            .split(area)[1];
+
+            let popup_chunks = Layout::horizontal([
+                Constraint::Percentage(15),
+                Constraint::Percentage(70),
+                Constraint::Percentage(15),
+            ])
+            .split(popup_area);
+
+            let popup_rect = popup_chunks[1];
+
+            // Fill popup area with a solid background, similar to other popups
+            let popup_bg = Style::default().bg(Color::Rgb(10, 10, 10)).fg(Color::White);
+            for y in popup_rect.y..popup_rect.y + popup_rect.height {
+                for x in popup_rect.x..popup_rect.x + popup_rect.width {
+                    if let Some(cell) = buf.cell_mut((x, y)) {
+                        cell.set_char(' ').set_style(popup_bg);
+                    }
+                }
+            }
+
+            let popup_block = Block::bordered()
+                .title("JSON")
+                .style(popup_bg)
+                .border_style(Style::default().fg(Color::Yellow));
+
+            let popup_inner = popup_block.inner(popup_rect);
+            popup_block.render(popup_rect, buf);
+
+            ratatui::widgets::Paragraph::new(self.json_popup_content.as_str())
+                .wrap(ratatui::widgets::Wrap { trim: false })
+                .style(popup_bg)
+                .render(popup_inner, buf);
+        }
+
         let mut row_y = filter_inner.y;
 
         let field_style =
@@ -558,6 +601,10 @@ mod ui_tests {
             status_message: None,
             status_set_at: None,
 
+            // JSON popup defaults
+            json_popup_open: false,
+            json_popup_content: String::new(),
+
             saved_filters: Vec::new(),
             save_filter_popup_open: false,
             save_filter_name: String::new(),

src/ui/results.rs

@@ -173,11 +173,15 @@ mod tests {
             results_scroll: 0,
 
             tail_mode: false,
-            tail_stop: Arc::new(AtomicBool::new(false)),
+            tail_stop: std::sync::Arc::new(std::sync::atomic::AtomicBool::new(false)),
 
             status_message: None,
             status_set_at: None,
 
+            // JSON popup defaults
+            json_popup_open: false,
+            json_popup_content: String::new(),
+
             saved_filters: Vec::new(),
             save_filter_popup_open: false,
             save_filter_name: String::new(),