fix(live): git-init the seeded flake so doctor stops false-warning

BACKLOG #99: the live-session seed (nomarchy-seed-flake) did a bare
`cp -r` with no `git init`, so `~/.nomarchy` was not a repo in the live
session and nomarchy-doctor's `git ls-files --error-unmatch
theme-state.json` false-alarmed "theme-state.json is NOT git-tracked"
(installed systems commit at nomarchy-install.sh:654 and were always
fine). The seed now init+add+commits, exactly like the installer.

Verified: V2 — focused serial-log VM run
(/tmp/nomarchy-v2-theme-99/): doctor prints "theme-state.json is
git-tracked" and "flake checkout is clean"; GIT_REPO_OK / TRACKED_OK
markers. A drv-equivalence test proves the seed change is
build-neutral: homeConfigurations.<user>.activationPackage is
byte-identical path-seeded vs git-seeded
(bvl30ggn...-home-manager-generation.drv). nix flake check green.

The same run exposed a separate, pre-existing failure — offline theme
switching in the live session rebuilds from source and dies offline —
filed as BACKLOG #113 (NOT caused by this change: same drv either way).

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

hosts/live.nix

@@ -148,6 +148,16 @@ in
       if [ ! -e "$home/.nomarchy" ]; then
         cp -r ${nomarchySrc} "$home/.nomarchy"
         chmod -R u+w "$home/.nomarchy"
+        # Committed git repo, exactly like nomarchy-install produces —
+        # otherwise nomarchy-doctor (and its Waybar badge) false-alarms
+        # "theme-state.json is NOT git-tracked" in the live session.
+        (
+          cd "$home/.nomarchy"
+          ${pkgs.git}/bin/git init -q
+          ${pkgs.git}/bin/git add -A
+          ${pkgs.git}/bin/git -c user.name="Nomarchy Live" -c user.email="live@nomarchy" \
+            commit -qm "Nomarchy live session"
+        )
         chown -R ${username}:users "$home/.nomarchy"
       fi
     '';