fitnes: add the Fitness v2 mockup as the design reference

legacy/Fitnes v2/ is the static mockup the landing was just ported from
(README points to it as the current visual reference). launch.json gains a
fitnes-v2-legacy entry that serves it on :8090 for side-by-side review.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

fitnes/.claude/launch.json

@@ -6,6 +6,12 @@
       "runtimeExecutable": "npm",
       "runtimeArgs": ["run", "dev:client"],
       "port": 5173
+    },
+    {
+      "name": "fitnes-v2-legacy",
+      "runtimeExecutable": "python3",
+      "runtimeArgs": ["-m", "http.server", "8090", "--directory", "/Users/yp/projects/exodevices/fitnes/legacy/Fitnes v2"],
+      "port": 8090
     }
   ]
 }