feat: browser session persistence, auto-screenshots, context optimization, user cleanup

Browser tool:
- Session-persistent Chrome tab (same tab reused across all calls in a pentest)
- Auto-screenshot on every navigate and click (stored in attack chain for report)
- Fill uses CDP Input.insertText (fixes WebSocket corruption on special chars)
- Switched from browserless/chromium to chromedp/headless-shell (stable WS)

Context window optimization:
- Strip screenshot_base64 from LLM conversation (kept in DB for report)
- Truncate HTML to 2KB, page text to 1.5KB in LLM messages
- Cap element/link arrays at 15 items
- SAST triage: batch 30 findings per LLM call instead of all at once

Report improvements:
- Auto-embed screenshots in attack chain timeline (navigate + click nodes)
- Cover page shows best app screenshot
- Attack chain phases capped at 8 (no more 20x "Final")

User cleanup:
- TestUserRecord model tracks created test users per session
- cleanup.rs: Keycloak (Admin REST API), Auth0 (Management API), Okta (Users API)
- Auto-cleanup on session completion when cleanup_test_user is enabled
- Env vars: KEYCLOAK_ADMIN_USERNAME, KEYCLOAK_ADMIN_PASSWORD

System prompt:
- Explicit browser usage instructions (navigate → get_content → click → fill)
- SPA auth bypass guidance (check page content, not HTTP status)
- Screenshot instructions for evidence collection

Other:
- Pin mongo:7 in docker-compose (mongo:latest/8 segfaults on kernel 6.19)
- Add deploy/docker-compose.mailserver.yml for Postfix + Dovecot

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

compliance-agent/src/pentest/orchestrator.rs

@@ -390,10 +390,13 @@ impl PentestOrchestrator {
                                         )
                                         .await;
 
+                                    // Build LLM-facing summary: strip large fields
+                                    // (screenshots, raw HTML) to save context window
+                                    let llm_data = summarize_tool_output(&result.data);
                                     serde_json::json!({
                                         "summary": result.summary,
                                         "findings_count": findings_count,
-                                        "data": result.data,
+                                        "data": llm_data,
                                     })
                                     .to_string()
                                 }
@@ -465,21 +468,61 @@ impl PentestOrchestrator {
                 .await;
         }
 
-        // If cleanup_test_user is requested, append a cleanup instruction
+        // Clean up test user via identity provider API if requested
         if session
             .config
             .as_ref()
             .is_some_and(|c| c.auth.cleanup_test_user)
         {
-            let cleanup_msg = PentestMessage::user(
-                session_id.clone(),
-                "Testing is complete. Now please clean up: navigate to the application and delete \
-                 the test user account that was created during this session. Confirm once done."
-                    .to_string(),
-            );
-            let _ = self.db.pentest_messages().insert_one(&cleanup_msg).await;
+            if let Some(ref test_user) = session.test_user {
+                let http = reqwest::Client::new();
+                // We need the AgentConfig — read from env since orchestrator doesn't hold it
+                let config = crate::config::load_config();
+                match config {
+                    Ok(cfg) => {
+                        match crate::pentest::cleanup::cleanup_test_user(test_user, &cfg, &http)
+                            .await
+                        {
+                            Ok(true) => {
+                                tracing::info!(
+                                    username = test_user.username.as_deref(),
+                                    "Test user cleaned up via provider API"
+                                );
+                                // Mark as cleaned up in DB
+                                if let Some(sid) = session.id {
+                                    let _ = self
+                                        .db
+                                        .pentest_sessions()
+                                        .update_one(
+                                            doc! { "_id": sid },
+                                            doc! { "$set": { "test_user.cleaned_up": true } },
+                                        )
+                                        .await;
+                                }
+                            }
+                            Ok(false) => {
+                                tracing::info!(
+                                    "Test user cleanup skipped (no provider configured)"
+                                );
+                            }
+                            Err(e) => {
+                                tracing::warn!(error = %e, "Test user cleanup failed");
+                                let _ = self.event_tx.send(PentestEvent::Error {
+                                    message: format!("Test user cleanup failed: {e}"),
+                                });
+                            }
+                        }
+                    }
+                    Err(e) => {
+                        tracing::warn!(error = %e, "Could not load config for cleanup");
+                    }
+                }
+            }
         }
 
+        // Clean up the persistent browser session for this pentest
+        compliance_dast::tools::browser::cleanup_browser_session(&session_id).await;
+
         let _ = self.event_tx.send(PentestEvent::Complete {
             summary: format!(
                 "Pentest complete. {} findings from {} tool invocations.",
@@ -490,3 +533,82 @@ impl PentestOrchestrator {
         Ok(())
     }
 }
+
+/// Strip large fields from tool output before sending to the LLM.
+/// Screenshots, raw HTML, and other bulky data are replaced with short summaries.
+/// The full data is still stored in the DB for the report.
+fn summarize_tool_output(data: &serde_json::Value) -> serde_json::Value {
+    let Some(obj) = data.as_object() else {
+        return data.clone();
+    };
+
+    let mut summarized = serde_json::Map::new();
+    for (key, value) in obj {
+        match key.as_str() {
+            // Replace screenshot base64 with a placeholder
+            "screenshot_base64" => {
+                if let Some(s) = value.as_str() {
+                    if !s.is_empty() {
+                        summarized.insert(
+                            key.clone(),
+                            serde_json::Value::String(
+                                "[screenshot captured and saved to report]".to_string(),
+                            ),
+                        );
+                        continue;
+                    }
+                }
+                summarized.insert(key.clone(), value.clone());
+            }
+            // Truncate raw HTML content
+            "html" => {
+                if let Some(s) = value.as_str() {
+                    if s.len() > 2000 {
+                        summarized.insert(
+                            key.clone(),
+                            serde_json::Value::String(format!(
+                                "{}... [truncated, {} chars total]",
+                                &s[..2000],
+                                s.len()
+                            )),
+                        );
+                        continue;
+                    }
+                }
+                summarized.insert(key.clone(), value.clone());
+            }
+            // Truncate page text
+            "text" if value.as_str().is_some_and(|s| s.len() > 1500) => {
+                let s = value.as_str().unwrap_or_default();
+                summarized.insert(
+                    key.clone(),
+                    serde_json::Value::String(format!("{}... [truncated]", &s[..1500])),
+                );
+            }
+            // Trim large arrays (e.g., "elements", "links", "inputs")
+            "elements" | "links" | "inputs" => {
+                if let Some(arr) = value.as_array() {
+                    if arr.len() > 15 {
+                        let mut trimmed: Vec<serde_json::Value> = arr[..15].to_vec();
+                        trimmed.push(serde_json::json!(format!(
+                            "... and {} more",
+                            arr.len() - 15
+                        )));
+                        summarized.insert(key.clone(), serde_json::Value::Array(trimmed));
+                        continue;
+                    }
+                }
+                summarized.insert(key.clone(), value.clone());
+            }
+            // Recursively summarize nested objects (e.g., "page" in get_content)
+            _ if value.is_object() => {
+                summarized.insert(key.clone(), summarize_tool_output(value));
+            }
+            // Keep everything else as-is
+            _ => {
+                summarized.insert(key.clone(), value.clone());
+            }
+        }
+    }
+    serde_json::Value::Object(summarized)
+}