Fix Wahoo import bugs, add Import All, update spec

Bugs fixed:
- FIT parser returns timestamps as Date objects, not strings — convert
  to ISO 8601 before passing to generateGpx (caused str.replace crash)
- FIT parser already converts semicircles to degrees — remove redundant
  conversion that produced near-zero coordinates
- Wahoo CDN URLs are pre-signed S3 URLs — remove Bearer auth header
  from download requests (caused 400 "Unsupported Authorization Type")
- Filter out third-party workouts (fitness_app_id >= 1000) since Wahoo
  does not share their data via the API

UX improvements:
- Individual imports use fetcher (no page refresh), button shows
  "Importing..." inline
- "Import all" button imports all unimported workouts on the page
  sequentially with progress indicator
- Add @vitejs/plugin-basic-ssl for local HTTPS dev (opt-in via HTTPS=1)

Also adds unit test for FIT-to-GPX conversion with real fixture file,
and updates wahoo-import spec to reflect all behaviors.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/journal/vite.config.ts

@@ -11,6 +11,7 @@ export default defineConfig({
   plugins: [
     tailwindcss(),
     reactRouter(),
+    ...(process.env.HTTPS === "1" ? [import("@vitejs/plugin-basic-ssl").then((m) => m.default())] : []),
     sentryVitePlugin({
       org: "trails-qq",
       project: "journal",