Fix update notification not showing on all commands

Extract command dispatch into run_command() so maybe_notify_update()
always runs after command completion, regardless of early returns.
Previously, commands like `lattice drift` with no drift would return
early and skip the update check. Also move the bare `lattice` update
check before Clap's --help (which exits the process).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: gmoon

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "lattice"
-version = "0.1.11"
+version = "0.1.12"
 edition = "2024"
 description = "A knowledge coordination protocol for human-agent collaboration"
 repository = "https://github.com/forkzero/lattice"

src/main.rs

@@ -1460,15 +1460,22 @@ fn main() {
     let command = match cli.command {
         Some(cmd) => cmd,
         None => {
-            // Re-parse with --help to show usage
-            Cli::parse_from(["lattice", "--help"]);
+            // Show update notification before help (Clap's --help exits the process)
             lattice::update::maybe_notify_update(None);
+            Cli::parse_from(["lattice", "--help"]);
             return;
         }
     };
 
     let command_name = command_to_name(&command);
 
+    run_command(command);
+
+    // Passive update check after command output is complete
+    lattice::update::maybe_notify_update(Some(command_name));
+}
+
+fn run_command(command: Commands) {
     match command {
         Commands::Init {
             force,
@@ -3409,9 +3416,6 @@ fn main() {
             }
         }
     }
-
-    // Passive update check after command output is complete
-    lattice::update::maybe_notify_update(Some(command_name));
 }
 
 #[cfg(test)]

src/update.rs

@@ -355,20 +355,13 @@ fn print_update_notice(latest: &Version) {
 /// non-TTY stderr, dev builds, and when HOME is unset. Caches the check
 /// result for 24 hours to avoid repeated network requests.
 pub fn maybe_notify_update(command_name: Option<&str>) {
-    use std::io::IsTerminal;
-
     // Skip for commands that handle updates themselves or use stdio protocol
     if let Some(name) = command_name
         && (name == "update" || name == "mcp")
     {
         return;
     }
 
-    // Skip if stderr is not a terminal (piped output)
-    if !std::io::stderr().is_terminal() {
-        return;
-    }
-
     // Skip dev builds
     if !is_installed_binary() {
         return;