fix(sae): purge all hardcoded fallback coords — autonomous structural dismiss

- Removed hardcoded (540,150) fallback in _plan_escape_via_llm
- Added _find_structural_dismiss_target: scans raw XML for clickable
  dismiss/cancel/close buttons and extracts coords from bounds attrs
- LLM repeat detection now falls back to structural scan (not magic numbers)
- Temperature increases progressively when LLM is stubborn (0.1 → 0.7)
- Failure history injected as CRITICAL block into LLM system prompt
- Extended pre-commit test discovery to include tests/tdd/
- TDD: 7 new tests including meta-tests proving zero hardcoded coords
- Full suite: 100/100 passed

scripts/pre_commit_tests.sh

@@ -21,10 +21,13 @@ else
             # Heuristic: Try to find a matching unit test
             test_file="tests/unit/test_${filename}"
             core_test_file="tests/core/test_${filename}"
+            tdd_test_file="tests/tdd/test_${filename}"
             if [ -f "$test_file" ]; then
                 TEST_TARGETS="$TEST_TARGETS $test_file"
             elif [ -f "$core_test_file" ]; then
                 TEST_TARGETS="$TEST_TARGETS $core_test_file"
+            elif [ -f "$tdd_test_file" ]; then
+                TEST_TARGETS="$TEST_TARGETS $tdd_test_file"
             else
                 # Try to find matching e2e tests by searching for each word in the module name
                 module_name="${filename%.py}"