Detect plan tier from .claude.json; seed sane caps per tier (Pro/Max 5x/Max 20x)

src-tauri/src/commands.rs

@@ -1,8 +1,9 @@
 //! Tauri command surface — every JS-callable function lives here.
 
 use crate::paths::{list_wsl_distros, resolve_roots, ResolvedRoots};
-use crate::settings::{save as save_settings, Settings};
+use crate::settings::{save as save_settings, Caps, Settings};
 use crate::state::SharedState;
+use crate::tier::{detect as detect_tier, PlanTier};
 use crate::usage::{build_snapshot, UsageSnapshot};
 use crate::watch::refresh_and_emit;
 
@@ -70,3 +71,22 @@ pub async fn quit_app(app: tauri::AppHandle) -> Result<(), String> {
     app.exit(0);
     Ok(())
 }
+
+#[derive(serde::Serialize)]
+pub struct TierInfo {
+    /// The classified tier — `Pro`, `Max5x`, `Max20x`, etc.
+    pub tier: PlanTier,
+    /// Human-readable label for the UI ("Max 5×" / "Pro" / "Unknown").
+    pub label: String,
+    /// The caps that this tier maps to. The user's current Settings may
+    /// differ if they tuned manually.
+    pub recommended_caps: Caps,
+}
+
+#[tauri::command]
+pub async fn detect_plan_tier() -> Result<TierInfo, String> {
+    let tier = detect_tier();
+    let label = tier.label();
+    let recommended_caps = tier.caps();
+    Ok(TierInfo { tier, label, recommended_caps })
+}