fix(installer): resolve /etc/nomarchy symlink before getFlake

`generate_state` loads `nixpkgs.lib` for the state-schema eval via
`builtins.getFlake "$NOMARCHY_REPO"`. On the live ISO that path is a
symlink chain (/etc/nomarchy -> /etc/static/nomarchy -> /nix/store/…-source),
and Nix 2.31+ rejects getFlake on a symlink ("path '…-source' is a
symlink"), aborting every real-hardware install right after hardware
config generation — single or multi disk.

Resolve the repo to its real store directory with `realpath` at
detection so getFlake receives a plain directory. The dev-checkout
branch already used realpath, so only the live-ISO path was affected.
Reproduced and fixed in a live VM (Nix 2.31.4).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/ROADMAP.md

@@ -177,6 +177,7 @@ Pillar is **done** when every component has had a live VM pass and the roadmap c
 
 (Move items here when they land — keep them brief, link the commit/PR.)
 
+- _2026-06-02_ — **Installer: real-hardware install was broken at "Creating system configuration" (every install, single or multi disk).** `generate_state` evaluates `lib/state-schema.nix` by calling `builtins.getFlake "$NOMARCHY_REPO"` to load `nixpkgs.lib`, with `NOMARCHY_REPO=/etc/nomarchy`. On the live ISO that's a symlink chain (`/etc/nomarchy → /etc/static/nomarchy → /nix/store/…-source`), and Nix 2.31+ rejects `getFlake` on a symlink path (`error: path '…-source' is a symlink`) — aborting the install right after hardware config generation. Reproduced the exact error in a live VM (Nix 2.31.4). **Fix:** resolve the repo to its real store directory with `realpath` at detection (`install.sh:261`). The dev-checkout branch already used `realpath`, so only the live-ISO path was affected. Verified the resolved path makes `getFlake` + the state-schema eval succeed in-VM.
 - _2026-05-31_ — **Ironclad: Overlap & Conflict Proofing complete.** Verified that manual Nix overrides in `home.nix` take precedence over UI choices without causing evaluation errors. **Fixed:** Updated `nomarchy-sync-nix-state` and the installer to wrap all machine-generated values in `nomarchy-state.nix` with `lib.mkDefault`. This ensures a user can manually set `nomarchy.theme = "catppuccin"` in their config, safely overriding the UI state without triggering "conflicting definition values" errors in the module system.
 - _2026-05-31_ — **Ironclad: Input Method (Fcitx5) Functional Pass complete.** Verified that non-ASCII input (Pinyin/Mozc) is functional in the live VM. **Fixed:** Enabled `i18n.inputMethod.fcitx5.waylandFrontend = true` in `core/system/input-method.nix` to properly bind Fcitx5 to the Wayland text-input protocol, resolving missing environment variable issues and ensuring the candidate window renders correctly in Hyprland.
 - _2026-05-31_ — **Ironclad: Multi-Monitor Integrity complete.** Verified Hyprland, Waybar, and Walker behavior on dual-screen setups (simulated via dual `virtio-vga` VM devices). **Fixed:** Removed a hardcoded `"output": "DP-2"` parameter from the `summer-day` Waybar configuration, ensuring the bar spawns seamlessly across all connected monitors. Confirmed Walker inherently follows the active monitor as expected.

installer/install.sh

@@ -257,9 +257,14 @@ check_environment() {
     fi
     success "UEFI boot detected"
 
-    # Find Nomarchy repo
+    # Find Nomarchy repo. Resolve symlinks: on the live ISO /etc/nomarchy is a
+    # symlink chain (/etc/nomarchy -> /etc/static/nomarchy -> /nix/store/…-source).
+    # `builtins.getFlake` (used below to load nixpkgs.lib for the state-schema
+    # eval) rejects a symlink path with "path '…-source' is a symlink" on Nix
+    # 2.31+, which aborted every real-hardware install at "Creating system
+    # configuration". Pass it the resolved store directory instead.
     if [[ -d "/etc/nomarchy" ]]; then
-        NOMARCHY_REPO="/etc/nomarchy"
+        NOMARCHY_REPO="$(realpath /etc/nomarchy)"
     elif [[ -d "$(dirname "$0")/.." ]] && [[ -f "$(dirname "$0")/../flake.nix" ]]; then
         NOMARCHY_REPO="$(realpath "$(dirname "$0")/..")"
     fi