chore: config, flake, and misc working changes

Update .stack/config.nix, flake inputs, machine disk layout for
road-sweet, connect-rpc entity codegen, and edit-secret-dialog
optimistic update fix.

Author: czxtm

.stack/config.nix

@@ -0,0 +1,27 @@
+{ lib, ... }:
+{
+  disko.devices = {
+    disk.main = {
+      type = "disk";
+      device = lib.mkDefault "/dev/vda";
+      content = {
+        type = "gpt";
+        partitions = {
+          bios = {
+            size = "1M";
+            type = "EF02";
+          };
+
+          root = {
+            size = "100%";
+            content = {
+              type = "filesystem";
+              format = "ext4";
+              mountpoint = "/";
+            };
+          };
+        };
+      };
+    };
+  };
+}

.stack/machines/road-sweet/disks.nix

@@ -14,6 +14,7 @@
 # ==============================================================================
 {
   config,
+  inputs,
   lib,
   pkgs,
   ...
@@ -37,6 +38,11 @@ in
     # PostgreSQL package - requires pkgs, so lives here instead of config.nix
     stackpanel.globalServices.postgres.package = pkgs.postgresql_17;
 
+    # Snapshot review tooling for Nix deployment regression tests.
+    stackpanel.devshell.packages = [
+      inputs.namaka.packages.${pkgs.system}.default
+    ];
+
     # Runtime dependencies of `stackpanel` CLI.
     # Declaring them as runtimeInputs has two effects:
     #   1. nix build .#stackpanel-go → binary is wrapped so it finds these tools

.stack/nix/default.nix

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-PROJECT_ROOT=''
+PROJECT_ROOT=/Users/cm/.mux/src/stackpanel/stackpanel-71sc
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 if [[ -d "$PROJECT_ROOT/.stack/secrets/vars" ]]; then
   SECRETS_DIR="$PROJECT_ROOT/.stack/secrets"
@@ -13,7 +13,7 @@ SOPS_CONFIG="$SECRETS_DIR/.sops.yaml"
 FILTER="${1:-}"
 REKEY_COUNT=0
 
-export SOPS_AGE_KEY_CMD="${SOPS_AGE_KEY_CMD:-/nix/store/r10qifx43ql6c6zb9sxwv9a775jl7v5z-sops-age-keys/bin/sops-age-keys}"
+export SOPS_AGE_KEY_CMD="${SOPS_AGE_KEY_CMD:-/nix/store/afa15yhl99dmy3cl2z1zrkxpmvz5450v-sops-age-keys/bin/sops-age-keys}"
 
 if [[ ! -d "$VARS_DIR" ]]; then
   echo "No vars directory found at $VARS_DIR"