Policy Studio firewall editor + focus mode

[yaront1111]

Summary\nAdd a firewall-style visual policy bundle editor with a raw YAML escape hatch, plus a Studio Focus selector to reduce clutter in Policy Studio.\n\n## Why\nPolicy authoring was text-heavy and hard to scan; operators need a firewall-style rule table and a focused workflow.\n\n## Scope\n- Firewall view parses bundle YAML rules into a visual table (ordered, add/edit/duplicate/delete, move up/down)\n- Raw YAML remains available with clear formatting warning\n- Bundle simulation highlights the matched rule\n- Studio Focus lets users show one section at a time\n\n## Notes\n- Applies to secops/* bundles when admin role is set\n- No backend changes required\n