feat: pure Dioxus attack chain visualization, PDF report redesign, and orchestrator data fixes

- Replace vis-network JS graph with pure RSX attack chain component
  featuring KPI header, phase rail, expandable accordion with tool
  category chips, risk scores, and findings pills
- Redesign pentest report as professional PDF-first document with
  cover page, table of contents, severity bar chart, phased attack
  chain timeline, and print-friendly light theme
- Fix orchestrator to populate findings_produced, risk_score, and
  llm_reasoning on attack chain nodes
- Capture LLM reasoning text alongside tool calls in LlmResponse enum
- Add session-level KPI fallback for older pentest data
- Remove attack-chain-viz.js and prototype files
- Add encrypted ZIP report export endpoint with password protection

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

compliance-dashboard/src/app.rs

@@ -53,8 +53,6 @@ const MAIN_CSS: Asset = asset!("/assets/main.css");
 const TAILWIND_CSS: Asset = asset!("/assets/tailwind.css");
 const VIS_NETWORK_JS: Asset = asset!("/assets/vis-network.min.js");
 const GRAPH_VIZ_JS: Asset = asset!("/assets/graph-viz.js");
-const ATTACK_CHAIN_VIZ_JS: Asset = asset!("/assets/attack-chain-viz.js");
-
 #[component]
 pub fn App() -> Element {
     rsx! {
@@ -63,7 +61,6 @@ pub fn App() -> Element {
         document::Link { rel: "stylesheet", href: MAIN_CSS }
         document::Script { src: VIS_NETWORK_JS }
         document::Script { src: GRAPH_VIZ_JS }
-        document::Script { src: ATTACK_CHAIN_VIZ_JS }
         Router::<Route> {}
     }
 }