feat: add ae_journal_list tool

Lists all Aether Journals for the configured account via
POST /v3/crud/journal/search with no filters (account scoped by header).
Returns name + id_random for each journal so the agent can discover
available journals before searching or writing entries.

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

cortex/tools/ae_knowledge.py

@@ -112,6 +112,52 @@ def _sync_journal_search(query: str, journal_id: str | None, max_results: int) -
     return "\n".join(lines).strip()
 
 
+# ---------------------------------------------------------------------------
+# Tool: ae_journal_list
+# ---------------------------------------------------------------------------
+
+async def journal_list() -> str:
+    """List all journals accessible to the configured AE account."""
+    err = _check_config()
+    if err:
+        return err
+    return await asyncio.to_thread(_sync_journal_list)
+
+
+def _sync_journal_list() -> str:
+    import requests
+
+    url = f"{settings.ae_api_url}/v3/crud/journal/search"
+    try:
+        resp = requests.post(
+            url,
+            headers=_headers(),
+            json={"page_size": 100},
+            timeout=settings.ae_api_timeout,
+        )
+        resp.raise_for_status()
+        data = resp.json()
+    except Exception as e:
+        logger.warning("ae_journal_list failed: %s", e)
+        return f"Journal list error: {e}"
+
+    journals = data.get("data", [])
+    if not journals:
+        return "No journals found for this account."
+
+    lines = [f"Journals ({len(journals)}):\n"]
+    for j in journals:
+        jid  = j.get("journal_id") or j.get("id_random") or j.get("id") or "?"
+        name = j.get("name") or "(untitled)"
+        desc = j.get("description") or ""
+        line = f"- **{name}** — id: `{jid}`"
+        if desc:
+            line += f"\n  {desc}"
+        lines.append(line)
+
+    return "\n".join(lines)
+
+
 # ---------------------------------------------------------------------------
 # Tool: ae_journal_entry_create
 # ---------------------------------------------------------------------------