Add task count to task list panel header

Show 'X todo / Y done' in the Tasks panel title bar.

Also includes prior uncommitted work:
- Pagination in fetch_tasks (maxResults=100 + pageToken loop)
- fetch_tasks_since for incremental pull sync
- SyncStats struct with version/last_sync/last_pull/changed counts
- Periodic push (30s) and pull (5min) sync engine
- event::poll(100ms) for non-blocking UI refresh
- Ctrl+R full sync (push + pull)
- refresh_if_needed() to reload data after background sync
- Retry mechanism (MAX_SYNC_RETRIES=3) for sync queue items
- HTTP status code checks in fetch_lists/fetch_tasks/fetch_tasks_since
- Fix move_task URL to use reqwest query()
- Remove CASCADE via replace_all_lists (use insert_list instead)
- has_pending_sync() to prevent pull during pending push

src/ui/components.rs

@@ -5,6 +5,7 @@ use ratatui::layout::{Alignment, Rect};
 use ratatui::Frame;
 
 use crate::domain::models::*;
+use crate::app::SyncStats;
 use super::NetworkStatus;
 
 const TAB_COLOR: Color = Color::Cyan;
@@ -56,6 +57,10 @@ pub fn render_task_list(
     focused: bool,
     _scroll: u16,
 ) {
+    let total = tasks.len();
+    let done = tasks.iter().filter(|t| t.status == TaskStatus::Completed).count();
+    let todo = total - done;
+
     let items: Vec<ListItem> = tasks
         .iter()
         .map(|task| {
@@ -100,7 +105,7 @@ pub fn render_task_list(
     let block = Block::default()
         .borders(Borders::ALL)
         .border_style(Style::default().fg(if focused { FOCUS_COLOR } else { Color::DarkGray }))
-        .title(" Tasks ")
+        .title(format!(" Tasks ({} todo / {} done) ", todo, done))
         .title_alignment(Alignment::Left);
 
     let list = List::new(items)
@@ -185,18 +190,40 @@ pub fn render_status_bar(
     frame: &mut Frame,
     area: Rect,
     status: &NetworkStatus,
+    sync_stats: &SyncStats,
 ) {
-    let (text, color) = match status {
+    let (status_text, color) = match status {
         NetworkStatus::Online => (" ONLINE ", STATUS_ONLINE),
         NetworkStatus::Offline => (" OFFLINE ", STATUS_OFFLINE),
         NetworkStatus::Syncing => (" SYNCING... ", STATUS_SYNC),
     };
 
+    let right_text = match sync_stats.last_sync_time {
+        Some(time) => {
+            let time_str = time.format("%H:%M:%S").to_string();
+            let mut parts: Vec<String> = Vec::new();
+            if sync_stats.lists_changed > 0 {
+                parts.push(format!("{} lists", sync_stats.lists_changed));
+            }
+            if sync_stats.tasks_changed > 0 {
+                parts.push(format!("{} tasks", sync_stats.tasks_changed));
+            }
+            if parts.is_empty() {
+                format!(" {} last sync ", time_str)
+            } else {
+                format!(" {} last sync: {} ", time_str, parts.join(", "))
+            }
+        }
+        None => String::new(),
+    };
+
+    let full_text = format!("{}{}", status_text, right_text);
+
     let block = Block::default()
         .style(Style::default().bg(color).fg(Color::Black));
 
     let paragraph = Paragraph::new(Line::from(Span::styled(
-        text,
+        full_text,
         Style::default().fg(Color::Black).add_modifier(Modifier::BOLD),
     )))
     .block(block)