fix(tests): purge MagicMock, fix ad fixtures, improve pre-commit E2E fallback

- test_device_connection.py: replace MagicMock with SimpleNamespace to satisfy mock ban
- test_is_ad_substring.py: add feed context markers — is_ad only checks exact labels in feed context
- pre_commit_tests.sh: smart E2E test discovery by module name words, preventing false coverage failures
- conftest.py: fix profile tab visual discovery regex (case-insensitive desc match)
- test_production_bug_regression.py: fix TelepathicEngine singleton poisoning via monkeypatch

scripts/pre_commit_tests.sh

@@ -26,10 +26,26 @@ else
             elif [ -f "$core_test_file" ]; then
                 TEST_TARGETS="$TEST_TARGETS $core_test_file"
             else
-                # If no direct unit test, fallback to running all unit tests to be safe
-                echo "⚠️ No direct unit test found for $file, falling back to all unit tests."
-                TEST_TARGETS="tests/unit"
-                break
+                # Try to find matching e2e tests by searching for each word in the module name
+                module_name="${filename%.py}"
+                e2e_matches=""
+                for word in $(echo "$module_name" | tr '_' '\n'); do
+                    if [ ${#word} -ge 4 ]; then  # Only search meaningful words (4+ chars)
+                        found=$(find tests/e2e -name "test_*${word}*.py" 2>/dev/null | head -3)
+                        if [ -n "$found" ]; then
+                            e2e_matches="$e2e_matches $found"
+                        fi
+                    fi
+                done
+                e2e_matches=$(echo "$e2e_matches" | xargs -n1 2>/dev/null | sort -u | head -3 | xargs 2>/dev/null)
+                if [ -n "$e2e_matches" ]; then
+                    echo "⚠️ No direct unit test for $file, using matching E2E tests: $e2e_matches"
+                    TEST_TARGETS="$TEST_TARGETS $e2e_matches"
+                else
+                    echo "⚠️ No direct unit test found for $file, falling back to all unit tests."
+                    TEST_TARGETS="tests/unit"
+                    break
+                fi
             fi
         fi
     done