test(windows): C-1 pre-fix tests for Windows-specific bugs

Pre-fix test suite for 7 Windows-specific findings. All tests
are SHARED (no build tags) — they compile and run on Linux
using source file inspection and direct function calls.

Tests added:
- F-C1-1 HIGH: Winget PATH-only search (2 tests)
- F-C1-2 MEDIUM: Winget text parser spaces bug (4 tests)
- F-C1-3 HIGH: Ghost updates — no post-install verification (3 tests)
- F-C1-4 RESOLVED: Service auto-restart already configured (1 test)
- F-C1-5 HIGH: Duplicated polling loop missing B-2 fixes (5 tests)
- F-C1-6 LOW: Winget uses fmt.Printf (2 tests)
- F-C1-7 LOW: Service has emojis in logs (2 tests)

Current state: 8 FAIL, 11 PASS. All prior tests pass.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docs/C1_PreFix_Tests.md

@@ -0,0 +1,58 @@
+# C-1 Pre-Fix Test Suite
+
+**Date:** 2026-03-29
+**Branch:** culurien
+**Purpose:** Document Windows-specific bugs BEFORE fixes.
+**Reference:** docs/C1_Windows_Audit.md
+
+---
+
+## Test Files
+
+| File | Package | Tag | Bugs |
+|------|---------|-----|------|
+| `scanner/winget_path_test.go` | `scanner` | SHARED | F-C1-1 |
+| `scanner/winget_parser_test.go` | `scanner` | SHARED | F-C1-2, F-C1-8 |
+| `scanner/winget_logging_test.go` | `scanner` | SHARED | F-C1-6 |
+| `scanner/windows_ghost_test.go` | `scanner` | SHARED | F-C1-3 |
+| `scanner/windows_service_parity_test.go` | `scanner` | SHARED | F-C1-4, F-C1-5, F-C1-7 |
+
+All tests read source files as text — no Windows APIs needed.
+All compile and run on Linux. Zero platform-specific imports.
+
+---
+
+## State-Change Summary
+
+| Test | Bug | Current | After Fix |
+|------|-----|---------|-----------|
+| TestWingetSearchesPathOnly | F-C1-1 | PASS | update |
+| TestWingetChecksKnownInstallLocations | F-C1-1 | **FAIL** | PASS |
+| TestWingetTextParserHandlesSpacesInPackageNames | F-C1-2 | **FAIL** | PASS |
+| TestWingetTextParserCurrentlyBreaksOnSpaces | F-C1-2 | PASS | update |
+| TestWingetJsonParserHandlesSpacesInPackageNames | F-C1-2 | PASS | PASS |
+| TestWingetParserReturnsConsistentStructure | F-C1-2 | PASS | PASS |
+| TestWindowsUpdateInstallerHasNoPostInstallVerification | F-C1-3 | PASS | update |
+| TestWindowsUpdateInstallerVerifiesPostInstallState | F-C1-3 | **FAIL** | PASS |
+| TestWindowsUpdateSearchCriteriaExcludesInstalled | F-C1-3 | PASS | PASS |
+| TestWindowsServiceHasAutoRestartOnCrash | F-C1-4 | PASS | PASS |
+| TestWindowsServicePollingLoopHasFixedJitter | F-C1-5 | PASS | update |
+| TestWindowsServicePollingLoopHasProportionalJitter | F-C1-5 | **FAIL** | PASS |
+| TestWindowsServicePollingLoopHasNoExponentialBackoff | F-C1-5 | PASS | update |
+| TestWindowsServicePollingLoopHasExponentialBackoff | F-C1-5 | **FAIL** | PASS |
+| TestPollingLoopIsNotDuplicated | F-C1-5 | **FAIL** | PASS |
+| TestWingetScannerUsesStructuredLogging | F-C1-6 | PASS | update |
+| TestWingetScannerHasNoFmtPrintf | F-C1-6 | **FAIL** | PASS |
+| TestWindowsServiceHasEmojiInLogs | F-C1-7 | PASS | update |
+| TestWindowsServiceHasNoEmojiInLogs | F-C1-7 | **FAIL** | PASS |
+
+**8 FAIL** (assert post-fix), **11 PASS** (document state).
+
+---
+
+## Notes
+
+1. F-C1-4 was resolved during testing: `SetRecoveryActions` already exists in the service code. The audit finding was incorrect.
+2. All tests are SHARED (no build tags) — they read source files as text.
+3. Winget parser tests (Part 2) call Go functions directly — they test pure parsing logic.
+4. All prior B-2 and A-series agent tests continue to pass.