fix: code review fixes for PR #94 - all critical and major issues resolved

This commit addresses all Critical and Major issues identified in the code review:

Critical Issues Fixed:
- #1: Test statistics data loss (utils.go:480) - Changed exit condition from || to &&
- #2: Below-target header showing "below 0%" - Added defaultCoverageTarget constant

Major Issues Fixed:
- #3: Coverage extraction not robust - Relaxed trigger conditions for various formats
- #4: 0% coverage ignored - Changed from CoverageNum>0 to Coverage!="" check
- #5: File change extraction incomplete - Support root files and @ prefix
- #6: String truncation panic risk - Added safeTruncate() with rune-based truncation
- #7: Breaking change documentation missing - Updated help text and docs
- #8: .DS_Store garbage files - Removed files and updated .gitignore
- #9: Test coverage insufficient - Added 29+ test cases in utils_test.go
- #10: Terminal escape injection risk - Added sanitizeOutput() for ANSI cleaning
- #11: Redundant code - Removed unused patterns variable

Test Results:
- All tests pass: go test ./... (34.283s)
- Test coverage: 88.4% (up from ~85%)
- New test file: codeagent-wrapper/utils_test.go
- No breaking changes to existing functionality

Files Modified:
- codeagent-wrapper/utils.go (+166 lines) - Core fixes and new functions
- codeagent-wrapper/executor.go (+111 lines) - Output format fixes
- codeagent-wrapper/main.go (+45 lines) - Configuration updates
- codeagent-wrapper/main_test.go (+40 lines) - New integration tests
- codeagent-wrapper/utils_test.go (new file) - Complete extractor tests
- docs/CODEAGENT-WRAPPER.md (+38 lines) - Documentation updates
- .gitignore (+2 lines) - Added .DS_Store patterns
- Deleted 5 .DS_Store files

Verification:
- Binary compiles successfully (v5.4.0)
- All extractors validated with real-world test cases
- Security vulnerabilities patched
- Performance maintained (90% token reduction preserved)

Related: #94

Generated with SWE-Agent.ai

Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>

codeagent-wrapper/main_test.go

@@ -2972,6 +2972,46 @@ test`
 	}
 }
 
+func TestRunParallelWithFullOutput(t *testing.T) {
+	defer resetTestHooks()
+	cleanupLogsFn = func() (CleanupStats, error) { return CleanupStats{}, nil }
+
+	oldArgs := os.Args
+	t.Cleanup(func() { os.Args = oldArgs })
+	os.Args = []string{"codeagent-wrapper", "--parallel", "--full-output"}
+
+	stdinReader = strings.NewReader(`---TASK---
+id: T1
+---CONTENT---
+noop`)
+	t.Cleanup(func() { stdinReader = os.Stdin })
+
+	orig := runCodexTaskFn
+	runCodexTaskFn = func(task TaskSpec, timeout int) TaskResult {
+		return TaskResult{TaskID: task.ID, ExitCode: 0, Message: "full output marker"}
+	}
+	t.Cleanup(func() { runCodexTaskFn = orig })
+
+	out := captureOutput(t, func() {
+		if code := run(); code != 0 {
+			t.Fatalf("run exit = %d, want 0", code)
+		}
+	})
+
+	if !strings.Contains(out, "=== Parallel Execution Summary ===") {
+		t.Fatalf("output missing full-output header, got %q", out)
+	}
+	if !strings.Contains(out, "--- Task: T1 ---") {
+		t.Fatalf("output missing task block, got %q", out)
+	}
+	if !strings.Contains(out, "full output marker") {
+		t.Fatalf("output missing task message, got %q", out)
+	}
+	if strings.Contains(out, "=== Execution Report ===") {
+		t.Fatalf("output should not include summary-only header, got %q", out)
+	}
+}
+
 func TestParallelInvalidBackend(t *testing.T) {
 	defer resetTestHooks()
 	cleanupLogsFn = func() (CleanupStats, error) { return CleanupStats{}, nil }