feat: add article_url to LLM call logs for classify tracing

Adds an optional article_url column to llm_call_log so classify_summarize
entries are traceable back to their source article in the LLM Logs UI.

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

CLAUDE.md

@@ -117,7 +117,7 @@ cd frontend && npx tsc --noEmit
 - `GET /api/v1/admin/users` — user list
 - `PUT /api/v1/admin/users/:id/role` — role management
 
-## Database (20 migrations)
+## Database (21 migrations)
 Tables: `users`, `sessions`, `magic_link_tokens`, `user_settings`, `sources`, `syntheses`, `admin_providers`, `admin_rate_limits`, `user_api_keys`, `audit_log`
 
 ## Environment Variables

backend/migrations/20260325000021_add_article_url_to_llm_log.sql

@@ -0,0 +1 @@
+ALTER TABLE llm_call_log ADD COLUMN article_url TEXT;

backend/src/db/llm_call_log.rs

@@ -17,6 +17,7 @@ pub struct LlmCallLogRow {
     pub user_prompt: String,
     pub response_body: String,
     pub duration_ms: i32,
+    pub article_url: Option<String>,
     pub created_at: DateTime<Utc>,
 }
 
@@ -32,11 +33,12 @@ pub async fn insert(
     user_prompt: &str,
     response_body: &str,
     duration_ms: i32,
+    article_url: Option<&str>,
 ) -> Result<(), AppError> {
     sqlx::query(
         r#"
-        INSERT INTO llm_call_log (user_id, job_id, call_type, model, system_prompt, user_prompt, response_body, duration_ms)
+        INSERT INTO llm_call_log (user_id, job_id, call_type, model, system_prompt, user_prompt, response_body, duration_ms, article_url)
-        VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
+        VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
         "#,
     )
     .bind(user_id)
@@ -47,6 +49,7 @@ pub async fn insert(
     .bind(user_prompt)
     .bind(response_body)
     .bind(duration_ms)
+    .bind(article_url)
     .execute(pool)
     .await?;
     Ok(())
@@ -60,7 +63,7 @@ pub async fn list_by_job_id(
 ) -> Result<Vec<LlmCallLogRow>, AppError> {
     let rows = sqlx::query_as::<_, LlmCallLogRow>(
         r#"
-        SELECT id, call_type, model, system_prompt, user_prompt, response_body, duration_ms, created_at
+        SELECT id, call_type, model, system_prompt, user_prompt, response_body, duration_ms, article_url, created_at
         FROM llm_call_log
         WHERE user_id = $1 AND job_id = $2
         ORDER BY created_at ASC

backend/src/services/source_scraper.rs

@@ -172,6 +172,7 @@ pub async fn extract_article_links_with_llm(
         crate::db::llm_call_log::insert(
             pool, uid, jid, "link_extraction", model,
             &system, &user, &response_str, llm_duration as i32,
+            None,
         ).await.ok();
     }
 

backend/src/services/synthesis.rs

@@ -485,7 +485,7 @@ async fn run_generation_inner(
                     // Log the LLM call
                     if let Ok(ref resp) = result {
                         let resp_str = serde_json::to_string_pretty(resp).unwrap_or_default();
-                        crate::db::llm_call_log::insert(&pool, uid, jid, "classify_summarize", &mdl, &sys, &usr, &resp_str, duration as i32).await.ok();
+                        crate::db::llm_call_log::insert(&pool, uid, jid, "classify_summarize", &mdl, &sys, &usr, &resp_str, duration as i32, Some(&url)).await.ok();
                     }
 
                     (url, su, title, result)
@@ -569,7 +569,7 @@ async fn run_generation_inner(
         let llm_start = std::time::Instant::now();
         let raw_results = provider.call_llm(&model_websearch, &sys_prompt, &usr_prompt, &search_schema).await?;
         let llm_duration = llm_start.elapsed().as_millis() as u64;
-        log_llm_call(&state.pool, user_id, job_id, "search", &model_websearch, &sys_prompt, &usr_prompt, &raw_results, llm_duration).await;
+        log_llm_call(&state.pool, user_id, job_id, "search", &model_websearch, &sys_prompt, &usr_prompt, &raw_results, llm_duration, None).await;
 
         emit_progress(tx, "parsing", "Analyse des resultats...", 75);
         let parsed = parse_llm_output(&raw_results, &user_categories)?;
@@ -759,11 +759,13 @@ async fn log_llm_call(
     user_prompt: &str,
     response: &serde_json::Value,
     duration_ms: u64,
+    article_url: Option<&str>,
 ) {
     let response_str = serde_json::to_string_pretty(response).unwrap_or_default();
     db::llm_call_log::insert(
         pool, user_id, job_id, call_type, model,
         system_prompt, user_prompt, &response_str, duration_ms as i32,
+        article_url,
     )
     .await
     .ok(); // Don't fail synthesis if logging fails

frontend/src/i18n/fr.ts

@@ -368,6 +368,7 @@ const fr = {
   'llmLogs.viewLogs': 'Voir les logs IA',
   'llmLogs.seconds': 's',
   'llmLogs.back': 'Retour',
+  'llmLogs.articleUrl': 'Article',
 
   // Common
   'common.loading': 'Chargement...',

frontend/src/pages/LlmLogs.tsx

@@ -7,6 +7,7 @@ import LoadingSpinner from '~/components/ui/LoadingSpinner';
 
 const CALL_TYPE_BADGE: Record<string, string> = {
   search: 'bg-blue-100 text-blue-800',
+  classify_summarize: 'bg-purple-100 text-purple-800',
   classification_phase1: 'bg-purple-100 text-purple-800',
   classification_phase2: 'bg-purple-100 text-purple-800',
   rewrite: 'bg-green-100 text-green-800',
@@ -94,6 +95,20 @@ const LlmLogs: Component = () => {
                     </span>
                   </div>
 
+                  <Show when={entry.article_url}>
+                    <div class="px-5 py-1 text-sm">
+                      <span class="text-gray-500">{t('llmLogs.articleUrl')}: </span>
+                      <a
+                        href={entry.article_url!}
+                        target="_blank"
+                        rel="noopener noreferrer"
+                        class="text-indigo-600 hover:text-indigo-800 underline break-all"
+                      >
+                        {entry.article_url}
+                      </a>
+                    </div>
+                  </Show>
+
                   <div class="divide-y divide-gray-100">
                     <details class="group">
                       <summary class="cursor-pointer px-5 py-2 text-sm font-medium text-gray-600 hover:text-gray-900 select-none list-none flex items-center gap-2">

frontend/src/types.ts

@@ -296,5 +296,6 @@ export interface LlmCallLogEntry {
   user_prompt: string;
   response_body: string;
   duration_ms: number;
+  article_url: string | null;
   created_at: string;
 }