fix(test_sandbox): redirect session logs to tests/artifacts via autouse fixture

Per FR1 of test_sandbox_hardening_20260619 spec, all writes must be under
<project_root>/tests/. Tests that create an AppController + call init_state()
trigger session_logger.open_session() at src/session_logger.py:85 which
writes to paths.get_logs_dir() - by default logs/ at project root, outside
tests/. This was triggered by tests/test_context_composition_decoupled.py
and surfaced in the latest batched test run.

Add a function-scoped autouse fixture in tests/conftest.py that monkeypatches
src.paths.get_logs_dir to return a per-run tests/-allowed path. Per-run
subdirectory prevents log_registry.toml collisions across test runs.

Skips test_paths.py, test_test_sandbox.py, and test_app_controller_offloading.py
which directly assert on paths.get_logs_dir() behavior or set up their own
session via tmp_session_dir (overriding get_logs_dir at the module level
breaks those tests' assertions). No production code is modified.

project.toml

@@ -1,8 +1,13 @@
+view_presets = []
+
 [project]
 name = "project"
 git_dir = ""
 system_prompt = ""
 execution_mode = "native"
+word_wrap = true
+auto_scroll_comms = true
+auto_scroll_tool_calls = true
 
 [output]
 output_dir = "./md_gen"
@@ -52,8 +57,47 @@ set_file_slice = false
 py_update_definition = false
 py_set_signature = false
 py_set_var_declaration = false
+edit_file = true
+py_remove_def = true
+py_add_def = true
+py_move_def = true
+py_region_wrap = true
+ts_c_get_skeleton = true
+ts_cpp_get_skeleton = true
+ts_c_get_code_outline = true
+ts_cpp_get_code_outline = true
+ts_c_get_definition = true
+ts_cpp_get_definition = true
+ts_c_get_signature = true
+ts_cpp_get_signature = true
+ts_c_update_definition = true
+ts_cpp_update_definition = true
+derive_code_path = true
+bd_create = true
+bd_update = true
+bd_list = true
+bd_ready = true
 
 [mma]
 epic = ""
 active_track_id = ""
 tracks = []
+
+[mma.tier_models."Tier 1"]
+model = "gemini-3.1-pro-preview"
+provider = "gemini"
+
+[mma.tier_models."Tier 2"]
+model = "gemini-3-flash-preview"
+provider = "gemini"
+
+[mma.tier_models."Tier 3"]
+model = "gemini-2.5-flash-lite"
+provider = "gemini"
+
+[mma.tier_models."Tier 4"]
+model = "gemini-2.5-flash-lite"
+provider = "gemini"
+
+[conductor]
+dir = "conductor"