test: stop requiring retired archive entrypoints in Python contracts

Flip archive tokens to must-not-appear on the session row and session hook only. Keep writeChatSession POST/PATCH and assert delete still uses DELETE. Grep tests/ before deleting frontend symbols.

frontend/AGENTS.md

@@ -3,3 +3,14 @@
 
 This version has breaking changes — APIs, conventions, and file structure may all differ from your training data. Read the relevant guide in `node_modules/next/dist/docs/` before writing any code. Heed deprecation notices.
 <!-- END:nextjs-agent-rules -->
+
+# Frontend change radius
+
+Before deleting or renaming a frontend symbol, class name, or visible copy, run
+`git grep -n "<symbol>" -- tests/ frontend/` — not `frontend/` alone.
+
+`tests/` holds Python source-contract tests that assert on frontend text
+(`test_session_management_entrypoints.py`,
+`test_daily_and_rectification_entrypoints.py`,
+`test_birth_time_journey_contract.py`). Grepping only `frontend/` missed them
+four times (BUG-933, BUG-934, BUG-939, BUG-992).

frontend/tests/database-session-list-visibility.test.ts

@@ -115,17 +115,15 @@ test("retire archive migration clears archived_at without bumping updated_at", {
     );
     assert.match(retireSql, /set archived_at = null/);
     assert.doesNotMatch(retireSql, /updated_at\s*=/);
-    fixture.psqlAs("schema_owner", "schema-owner-test-password", `
-      update public.chat_sessions set archived_at = null where archived_at is not null;
-    `);
+    const apply = retireSql.match(/update public\.chat_sessions\s+set archived_at = null\s+where archived_at is not null;/);
+    assert.ok(apply?.[0], "retire migration must contain the unarchive update");
+    fixture.psqlAs("schema_owner", "schema-owner-test-password", apply[0]);
     assert.equal(fixture.psql("select count(*) from public.chat_sessions where archived_at is not null"), "0");
     const after = fixture.psql(
       `select pinned::text || '|' || jsonb_array_length(messages)::text || '|' || updated_at::text from public.chat_sessions where id = '${archivedRectification}'`,
     );
     assert.equal(after, before);
-    fixture.psqlAs("schema_owner", "schema-owner-test-password", `
-      update public.chat_sessions set archived_at = null where archived_at is not null;
-    `);
+    fixture.psqlAs("schema_owner", "schema-owner-test-password", apply[0]);
     assert.equal(fixture.psql("select count(*) from public.chat_sessions where archived_at is not null"), "0");
   } finally {
     fixture.stop();