Fix: can't delete a 0-point (0 km) track

The Delete / Recalculate / Refine / Compare handlers were bound inside
`if (mapEl && points.length)` in showSessionDetail, so a track with no points
(started recording, no GPS fix, stopped → 0 km) skipped the whole block and its
"Удалить" button did nothing. Moved the session-action button handlers outside
the map/points guard so they bind regardless. (Also covers a track whose points
all get dropped by the new accuracy filter.)

DB.deleteGpsSession already handled zero points fine (DELETE of 0 rows is a
no-op); the bug was purely the unbound click handler.

frontend/js/main.js

@@ -4865,9 +4865,13 @@ async function showSessionDetail(sessionId) {
         session.bike_id = val;
       };
     }
+  }
 
-    // Compare button
-    let compareBtn = document.querySelector("#sd-compare");
+  // Session action buttons — bound OUTSIDE the map/points guard so a 0-point
+  // (0 km) track can still be deleted / recalculated / exported. Previously these
+  // sat inside `if (mapEl && points.length)`, so an empty track's Delete did nothing.
+  // Compare button
+  let compareBtn = document.querySelector("#sd-compare");
     if (compareBtn) compareBtn.onclick = () => showCompareModal(sessionId, session, points);
 
     // Recalculate button
@@ -4936,7 +4940,6 @@ async function showSessionDetail(sessionId) {
       history.back();
       renderScreen("gps");
     };
-  }
 
   // Goal markers — closest approach for each marker
   try {

src-tauri/Cargo.lock

@@ -139,7 +139,7 @@ checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8"
 
 [[package]]
 name = "baldav"
-version = "0.1.407"
+version = "0.1.408"
 dependencies = [
  "base64 0.22.1",
  "btleplug",

src-tauri/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "baldav"
-version = "0.1.407"
+version = "0.1.408"
 edition = "2021"
 
 [lib]

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://raw.githubusercontent.com/nicegui/tauri-v2/refs/heads/main/tooling/cli/schema.json",
   "productName": "BalDav",
-  "version": "0.1.407",
+  "version": "0.1.408",
   "identifier": "dev.baldav.app",
   "build": {
     "frontendDist": "../frontend"