feat: add persistent lifetime stats and sync achievements

- Add lifetime stats persistence to Rust backend
- Sync achievement state between frontend and backend on startup
- Add commands for loading/saving stats to disk
- Expand achievement definitions with 150+ new achievements
- Fix stats store to properly track total vs session metrics

src-tauri/src/commands.rs

@@ -102,6 +102,19 @@ pub async fn get_usage_stats(
     manager.get_usage_stats(&conversation_id)
 }
 
+/// Load persisted lifetime stats from store (no bridge required)
+#[tauri::command]
+pub async fn get_persisted_stats(app: AppHandle) -> Result<UsageStats, String> {
+    let mut stats = UsageStats::new();
+
+    // Load persisted stats if available
+    if let Some(persisted) = crate::stats::load_stats(&app).await {
+        stats.apply_persisted(persisted);
+    }
+
+    Ok(stats)
+}
+
 #[tauri::command]
 pub async fn validate_directory(
     path: String,

src-tauri/src/lib.rs

@@ -95,6 +95,7 @@ pub fn run() {
             get_config,
             save_config,
             get_usage_stats,
+            get_persisted_stats,
             load_saved_achievements,
             answer_question,
             send_windows_notification,

src-tauri/src/stats.rs

@@ -3,6 +3,7 @@ use chrono::{Local, Timelike};
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 use std::time::Instant;
+use tauri_plugin_store::StoreExt;
 
 #[derive(Debug, Clone, Serialize, Deserialize, Default)]
 pub struct UsageStats {
@@ -241,6 +242,111 @@ pub struct StatsUpdateEvent {
     pub stats: UsageStats,
 }
 
+/// Serializable struct for persisting only lifetime (total) stats
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
+pub struct PersistedStats {
+    pub total_input_tokens: u64,
+    pub total_output_tokens: u64,
+    pub total_cost_usd: f64,
+    pub messages_exchanged: u64,
+    pub code_blocks_generated: u64,
+    pub files_edited: u64,
+    pub files_created: u64,
+    pub tools_usage: HashMap<String, u64>,
+    pub sessions_started: u64,
+    pub consecutive_days: u64,
+    pub total_days_used: u64,
+    pub morning_sessions: u64,
+    pub night_sessions: u64,
+    pub last_session_date: Option<String>,
+}
+
+impl From<&UsageStats> for PersistedStats {
+    fn from(stats: &UsageStats) -> Self {
+        PersistedStats {
+            total_input_tokens: stats.total_input_tokens,
+            total_output_tokens: stats.total_output_tokens,
+            total_cost_usd: stats.total_cost_usd,
+            messages_exchanged: stats.messages_exchanged,
+            code_blocks_generated: stats.code_blocks_generated,
+            files_edited: stats.files_edited,
+            files_created: stats.files_created,
+            tools_usage: stats.tools_usage.clone(),
+            sessions_started: stats.sessions_started,
+            consecutive_days: stats.consecutive_days,
+            total_days_used: stats.total_days_used,
+            morning_sessions: stats.morning_sessions,
+            night_sessions: stats.night_sessions,
+            last_session_date: stats.last_session_date.clone(),
+        }
+    }
+}
+
+impl UsageStats {
+    /// Apply persisted stats to restore lifetime totals
+    pub fn apply_persisted(&mut self, persisted: PersistedStats) {
+        self.total_input_tokens = persisted.total_input_tokens;
+        self.total_output_tokens = persisted.total_output_tokens;
+        self.total_cost_usd = persisted.total_cost_usd;
+        self.messages_exchanged = persisted.messages_exchanged;
+        self.code_blocks_generated = persisted.code_blocks_generated;
+        self.files_edited = persisted.files_edited;
+        self.files_created = persisted.files_created;
+        self.tools_usage = persisted.tools_usage;
+        self.sessions_started = persisted.sessions_started;
+        self.consecutive_days = persisted.consecutive_days;
+        self.total_days_used = persisted.total_days_used;
+        self.morning_sessions = persisted.morning_sessions;
+        self.night_sessions = persisted.night_sessions;
+        self.last_session_date = persisted.last_session_date;
+    }
+}
+
+/// Save lifetime stats to persistent store
+pub async fn save_stats(app: &tauri::AppHandle, stats: &UsageStats) -> Result<(), String> {
+    let store = app.store("stats.json").map_err(|e| e.to_string())?;
+
+    let persisted = PersistedStats::from(stats);
+
+    println!("Saving stats: {:?}", persisted);
+
+    store.set(
+        "lifetime_stats",
+        serde_json::to_value(persisted).map_err(|e| e.to_string())?,
+    );
+    store.save().map_err(|e| e.to_string())?;
+
+    println!("Stats saved successfully");
+    Ok(())
+}
+
+/// Load lifetime stats from persistent store
+pub async fn load_stats(app: &tauri::AppHandle) -> Option<PersistedStats> {
+    println!("Loading stats from store...");
+
+    let store = match app.store("stats.json") {
+        Ok(s) => s,
+        Err(e) => {
+            println!("Failed to open stats store: {}", e);
+            return None;
+        }
+    };
+
+    if let Some(stats_value) = store.get("lifetime_stats") {
+        println!("Found lifetime stats in store: {:?}", stats_value);
+        if let Ok(persisted) = serde_json::from_value::<PersistedStats>(stats_value.clone()) {
+            println!("Loaded lifetime stats successfully");
+            return Some(persisted);
+        } else {
+            println!("Failed to parse lifetime stats");
+        }
+    } else {
+        println!("No lifetime stats found in store");
+    }
+
+    None
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

src-tauri/src/wsl_bridge.rs

@@ -112,7 +112,7 @@ impl WslBridge {
             return Err("Process already running".to_string());
         }
 
-        // Load saved achievements when starting a new session
+        // Load saved achievements and stats when starting a new session
         let app_clone = app.clone();
         let stats = self.stats.clone();
         tauri::async_runtime::spawn(async move {
@@ -122,7 +122,17 @@ impl WslBridge {
                 "Loaded {} unlocked achievements",
                 achievements.unlocked.len()
             );
-            stats.write().achievements = achievements;
+
+            println!("Loading saved stats...");
+            let persisted_stats = crate::stats::load_stats(&app_clone).await;
+
+            let mut stats_guard = stats.write();
+            stats_guard.achievements = achievements;
+
+            if let Some(persisted) = persisted_stats {
+                println!("Applying persisted lifetime stats");
+                stats_guard.apply_persisted(persisted);
+            }
         });
 
         let working_dir = &options.working_dir;
@@ -440,6 +450,18 @@ impl WslBridge {
         self.session_id = None;
         self.mcp_config_file = None; // Temp file is automatically deleted when dropped
 
+        // Save lifetime stats before resetting session
+        let stats_snapshot = self.stats.read().clone();
+        let app_clone = app.clone();
+        tauri::async_runtime::spawn(async move {
+            println!("Saving stats on session stop...");
+            if let Err(e) = crate::stats::save_stats(&app_clone, &stats_snapshot).await {
+                eprintln!("Failed to save stats: {}", e);
+            } else {
+                println!("Stats saved successfully on session stop");
+            }
+        });
+
         // Reset session stats on explicit disconnect
         self.stats.write().reset_session();
 
@@ -733,10 +755,23 @@ fn process_json_line(
 
             let current_stats = stats.read().clone();
             let stats_event = StatsUpdateEvent {
-                stats: current_stats,
+                stats: current_stats.clone(),
             };
             let _ = app.emit("claude:stats", stats_event);
 
+            // Save stats periodically (every 10 messages to avoid excessive disk writes)
+            if current_stats.session_messages_exchanged.is_multiple_of(10)
+                && current_stats.session_messages_exchanged > 0
+            {
+                let app_handle = app.clone();
+                tauri::async_runtime::spawn(async move {
+                    println!("Periodic stats save (every 10 messages)...");
+                    if let Err(e) = crate::stats::save_stats(&app_handle, &current_stats).await {
+                        eprintln!("Failed to save stats: {}", e);
+                    }
+                });
+            }
+
             // Only emit error results - success content is already sent via Assistant message
             if subtype != "success" {
                 if let Some(text) = result {