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/help.rs

@@ -238,6 +238,60 @@ pub static HELP_SPECS: &[HelpSpec] = &[
             HelpExample { desc: "Starts of one agent since a date.", code: "log claude-code --kind start --since 2026-08-01" },
         ],
     },
+    HelpSpec {
+        name: "logs",
+        category: "Commands",
+        usage: "logs {flags} <agent>",
+        about: "Tail the log file of an agent.",
+        search_terms: &["tail", "follow", "output"],
+        flags: &[
+            HelpFlag { short: "", long: "--lines", value: "N", desc: "Number of lines to show (default: 20)" },
+            HelpFlag { short: "", long: "--follow", value: "", desc: "Follow the log as it grows" },
+        ],
+        subcommands: &[],
+        parameters: &[
+            HelpParam { name: "agent", typ: "string", desc: "Agent name or alias" },
+        ],
+        io: None,
+        examples: &[
+            HelpExample { desc: "The last 20 lines.", code: "logs claude-code" },
+            HelpExample { desc: "A live view.", code: "logs claude-code --follow" },
+        ],
+    },
+    HelpSpec {
+        name: "open",
+        category: "Commands",
+        usage: "open {flags} <agent>",
+        about: "Open an agent's installation directory in the file manager.",
+        search_terms: &["explorer", "folder", "directory"],
+        flags: &[],
+        subcommands: &[],
+        parameters: &[
+            HelpParam { name: "agent", typ: "string", desc: "Agent name or alias" },
+        ],
+        io: None,
+        examples: &[
+            HelpExample { desc: "Open the install directory.", code: "open claude-code" },
+        ],
+    },
+    HelpSpec {
+        name: "alias",
+        category: "Commands",
+        usage: "alias {flags} <add|remove|list> [name] [target]",
+        about: "Manage command aliases (cc -> claude-code) without editing the YAML.",
+        search_terms: &["shortcut", "rename"],
+        flags: &[],
+        subcommands: &[
+            ("add", "Add an alias pointing to an agent"),
+            ("remove", "Remove an alias"),
+        ],
+        parameters: &[],
+        io: None,
+        examples: &[
+            HelpExample { desc: "Shortcut for claude-code.", code: "alias add cc claude-code" },
+            HelpExample { desc: "List every alias.", code: "alias list" },
+        ],
+    },
     HelpSpec {
         name: "history",
         category: "Commands",