Add launch statistics to dashboard

src/core/database.rs

@@ -1744,6 +1744,53 @@ impl Database {
         Ok(self.conn.last_insert_rowid())
     }
 
+    // --- Launch statistics ---
+
+    pub fn get_top_launched(&self, limit: i32) -> SqlResult<Vec<(String, u64)>> {
+        let mut stmt = self.conn.prepare(
+            "SELECT a.app_name, COUNT(l.id) as cnt
+             FROM launch_events l
+             JOIN appimages a ON a.id = l.appimage_id
+             GROUP BY l.appimage_id
+             ORDER BY cnt DESC
+             LIMIT ?1"
+        )?;
+        let rows = stmt.query_map(params![limit], |row| {
+            Ok((
+                row.get::<_, Option<String>>(0)?.unwrap_or_else(|| "Unknown".to_string()),
+                row.get::<_, u64>(1)?,
+            ))
+        })?;
+        rows.collect()
+    }
+
+    pub fn get_total_launch_count(&self) -> SqlResult<u64> {
+        self.conn.query_row(
+            "SELECT COUNT(*) FROM launch_events",
+            [],
+            |row| row.get(0),
+        )
+    }
+
+    pub fn get_last_launch(&self) -> SqlResult<Option<(String, String)>> {
+        match self.conn.query_row(
+            "SELECT a.app_name, l.launched_at
+             FROM launch_events l
+             JOIN appimages a ON a.id = l.appimage_id
+             ORDER BY l.launched_at DESC
+             LIMIT 1",
+            [],
+            |row| Ok((
+                row.get::<_, Option<String>>(0)?.unwrap_or_else(|| "Unknown".to_string()),
+                row.get::<_, String>(1)?,
+            )),
+        ) {
+            Ok(pair) => Ok(Some(pair)),
+            Err(rusqlite::Error::QueryReturnedNoRows) => Ok(None),
+            Err(e) => Err(e),
+        }
+    }
+
     // --- Source URL ---
 
     pub fn set_source_url(&self, id: i64, url: Option<&str>) -> SqlResult<()> {