fix(scripts): setup.ps1/sh comment parsing, network creation, elevation UX

- Strip inline comments from hosts template before hostname extraction
- Create stellaops bridge network if missing (was only creating frontdoor)
- Clear elevation warning with missing count, re-run instructions, clipboard copy
- Both setup.ps1 (Windows) and setup.sh (Linux/macOS) fixed

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/setup.sh

@@ -341,7 +341,13 @@ check_hosts() {
   local source_lines=()
   while IFS= read -r line; do
     [[ -z "${line// }" ]] && continue
+    # Skip full-line comments
     [[ "$line" =~ ^[[:space:]]*# ]] && continue
+    # Strip inline comments (e.g. "127.1.0.14 host.local  # alias note")
+    line="${line%%#*}"
+    # Trim trailing whitespace left after stripping the comment
+    line="${line%"${line##*[![:space:]]}"}"
+    [[ -z "$line" ]] && continue
     source_lines+=("$line")
   done < "$hosts_source"
 
@@ -445,24 +451,35 @@ get_frontdoor_network_name() {
   printf '%s\n' 'stellaops_frontdoor'
 }
 
-ensure_frontdoor_network() {
-  local network_name
-  network_name="$(get_frontdoor_network_name)"
+ensure_docker_network() {
+  local network_name="$1"
+  local label="$2"
 
   if docker network inspect "$network_name" >/dev/null 2>&1; then
-    ok "Frontdoor network available ($network_name)"
+    ok "$label network available ($network_name)"
     return
   fi
 
-  warn "Frontdoor network missing ($network_name); creating it now."
+  warn "$label network missing ($network_name); creating it now."
   docker network create "$network_name" >/dev/null
-  ok "Created frontdoor network ($network_name)"
+  ok "Created $label network ($network_name)"
+}
+
+ensure_stellaops_network() {
+  ensure_docker_network 'stellaops' 'Stellaops'
+}
+
+ensure_frontdoor_network() {
+  local network_name
+  network_name="$(get_frontdoor_network_name)"
+  ensure_docker_network "$network_name" 'Frontdoor'
 }
 
 # ─── 4. Start infrastructure ───────────────────────────────────────────────
 
 start_infra() {
   step 'Starting infrastructure containers (docker-compose.dev.yml)'
+  ensure_stellaops_network
   cd "$COMPOSE_DIR"
 
   docker compose -f docker-compose.dev.yml up -d
@@ -509,6 +526,7 @@ build_images() {
 
 start_platform() {
   step 'Starting full Stella Ops platform'
+  ensure_stellaops_network
   ensure_frontdoor_network
   cd "$COMPOSE_DIR"
   docker compose -f docker-compose.stella-ops.yml up -d