dashboard: use 'opencode --pure models' for model discovery

The config-page model dropdowns populate by running 'opencode models' (and a
login-shell fallback) in short-lived subprocesses. A plain 'opencode models'
boots the full OpenCode runtime and loads every configured external plugin. The
AFT plugin in particular spawns a native indexer daemon on load; when this
discovery process exits (or is killed by the 8s timeout), that daemon detaches,
reparents to launchd, and pegs 50-65% CPU. Every dashboard open spawned another.

'--pure' is a global OpenCode option (placed before the subcommand) that zeroes
external plugin origins, so no external plugin loads and nothing like AFT's
daemon is spawned, while built-in provider-auth plugins still load so the
printed provider/model list is unchanged. Applied to all three opencode
discovery sites (candidate binaries, Windows where.exe fallback, login-shell
fallback). The Pi path (pi --list-models) is unaffected.

Co-authored-by: Alfonso [Magic Context] <288211368+alfonso-magic-context@users.noreply.github.com>

Author: ualtinok

packages/dashboard/src-tauri/src/commands.rs

@@ -703,8 +703,15 @@ pub async fn get_available_models() -> Vec<String> {
             .collect()
     };
 
+    // `--pure` (global option, before the subcommand) lists models WITHOUT
+    // loading external plugins. A plain `opencode models` boots the full
+    // runtime and loads every configured plugin; the AFT plugin in particular
+    // spawns a native indexer daemon that then orphans and pegs CPU after this
+    // short-lived discovery process exits. `--pure` keeps built-in provider
+    // auth (so the model list is still correct) while skipping external plugin
+    // side effects entirely.
     for bin in &candidates {
-        if let Some(text) = run_bounded_binary(bin, &["models"]).await {
+        if let Some(text) = run_bounded_binary(bin, &["--pure", "models"]).await {
             let models = parse(&text);
             if !models.is_empty() {
                 return models;
@@ -714,7 +721,7 @@ pub async fn get_available_models() -> Vec<String> {
 
     if cfg!(target_os = "windows") {
         if let Some(bin) = resolve_via_where("opencode").await {
-            if let Some(text) = run_bounded_binary(&bin, &["models"]).await {
+            if let Some(text) = run_bounded_binary(&bin, &["--pure", "models"]).await {
                 let models = parse(&text);
                 if !models.is_empty() {
                     return models;
@@ -725,7 +732,7 @@ pub async fn get_available_models() -> Vec<String> {
 
     // Login-shell fallback for version-manager (mise/nvm/fnm) installs the
     // hardcoded candidates can't enumerate — see run_via_login_shell.
-    if let Some(text) = run_via_login_shell("opencode models".to_string()).await {
+    if let Some(text) = run_via_login_shell("opencode --pure models".to_string()).await {
         return parse(&text);
     }