quick wins (issues #9 #10 #11 #12 #13 #16) : am logs (tail+follow), am list --running/--sort, am config set, am alias add/remove/list, dedup historique, am open

src/history.rs

@@ -104,11 +104,17 @@ pub fn migrate(app: &App) -> Result<usize> {
     let text = std::fs::read_to_string(&txt)
         .with_context(|| format!("cannot read {}", txt.display()))?;
     let mut count = 0;
+    let mut previous: Option<String> = None;
     for line in text.lines() {
         let trimmed = line.trim();
         if trimmed.is_empty() || trimmed.starts_with('#') {
             continue;
         }
+        // Déduplication des répétitions consécutives (quick win #13).
+        if previous.as_deref() == Some(trimmed) {
+            continue;
+        }
+        previous = Some(trimmed.to_string());
         let entry = HistoryEntry::now(trimmed.to_string())
             .with_kind("am".to_string())
             .with_cwd(None);