feat: expanded toolchain check + install-all task

check-toolchain.sh now covers:
- golangci-lint
- npm
- web/ui node_modules (JS deps)
- electron node_modules (electron deps)

New install-all task (scripts/install-deps.sh):
- mise install (go, node, golangci-lint)
- cd web/ui && npm install
- cd electron && npm install

Usage:
  mise run check-toolchain   # audit everything
  mise run install-all       # install all deps from scratch

scripts/check-toolchain.sh

@@ -123,6 +123,54 @@ else
     fi
 fi
 
+echo ""
+
+# ─── golangci-lint ──────────────────────────────────────────────────────
+echo "golangci-lint:"
+if command -v golangci-lint &>/dev/null; then
+    gcl_ver=$(golangci-lint --version 2>/dev/null)
+    ok "golangci-lint found: $gcl_ver"
+else
+    warn "golangci-lint not found"
+    echo "    Install: mise install golangci-lint"
+fi
+
+echo ""
+echo "=== JS / Node ==="
+echo ""
+
+# ─── npm ────────────────────────────────────────────────────────────────
+echo "npm:"
+if command -v npm &>/dev/null; then
+    npm_ver=$(npm --version 2>/dev/null)
+    ok "npm found: v$npm_ver"
+else
+    warn "npm not found"
+    echo "    Install: mise install node"
+fi
+
+echo ""
+
+# ─── web/ui deps (eslint, globals) ──────────────────────────────────────
+echo "web/ui dependencies:"
+if [ -d web/ui/node_modules ] && [ -f web/ui/node_modules/.bin/eslint ]; then
+    ok "web/ui/node_modules installed"
+else
+    warn "web/ui/node_modules not installed"
+    echo "    Install: cd web/ui && npm install"
+fi
+
+echo ""
+
+# ─── electron deps ──────────────────────────────────────────────────────
+echo "electron dependencies:"
+if [ -d electron/node_modules ] && [ -f electron/node_modules/.bin/electron ]; then
+    ok "electron/node_modules installed"
+else
+    warn "electron/node_modules not installed"
+    echo "    Install: cd electron && npm install"
+fi
+
 echo ""
 echo "=== JS Linting (ESLint) ==="
 if [ -f web/ui/node_modules/.bin/eslint ]; then