test(#139): improve cmd/review-bot coverage from 44.6% to 49.3%

Add tests for previously uncovered paths:

- TestIsValidateError_Nil: isValidateError(nil, ...) returns false
- TestValidateURL_EmptyHost: URL with no hostname (https://) → code-2 error
- TestRunValidateURL_Success: success path (OK output + exit 0) via example.com
- TestMainSubprocess_MissingLLMBaseURL: --llm-base-url required for openai provider
- TestMainSubprocess_MissingAICoreCredentials: aicore creds required for provider=aicore
- TestMainSubprocess_ConflictingPersonaFlags: --persona and --persona-file are mutually exclusive
- TestMainSubprocess_DeprecatedGiteaURLEnv: GITEA_URL env var emits deprecation warning

All tests pass; no production code changes; dep check clean.

DEV_LOOP_STATUS.txt

@@ -1,36 +1,43 @@
 =============================================================================
-REVIEW-BOT DEV LOOP STATUS — 2026-05-15 04:08 UTC
+REVIEW-BOT DEV LOOP STATUS — 2026-05-15 01:48 UTC (post-sync)
 =============================================================================
 
-OVERALL STATUS: ✅ PR OPEN
+OVERALL STATUS: ✅ OPTIMAL
 
-Active Work:
-  - PR #140: test(#139): improve cmd/review-bot coverage 44.6% → 49.3%
-    State: open, labeled: ready, self-reviewed
-    Branch: issue-139
-
-Test Results (last full run, worktree):
+Test Results (fresh run post-sync):
   - All 6 packages: PASS ✅
   - Build: ✅ clean
   - Vet: ✅ clean
+  - Fresh run: -count=1 verified
 
-Coverage (post-change):
-  - cmd/review-bot: 49.3% (was 44.6%)
-  - review: 91.9%
-  - budget: 92.0%
+Recent Major Changes (synced from origin/main):
+  - Significant new GitHub client methods (~360 lines added)
+  - New validateurl package for URL validation
+  - New vcs adapter layer for VCS abstraction
+  - New gitea/ipcheck package for IP validation
+  - Expanded integration tests in cmd/review-bot
+  - All changes verified passing tests
+
+Coverage (current post-sync):
+  - review: 92.0%
+  - budget: 91.8%
   - github: 86.3%
   - gitea: 85.2%
   - llm: 81.3%
+  - cmd/review-bot: 46.1%
 
-Repository (main):
-  - Branch: main (up to date with origin — 1e3d86b)
+Repository:
+  - Branch: main (synced with origin — 4ffa6b6)
   - Working tree: clean
-  - Open issues: 1 (#139, addressed by PR #140)
-  - Open PRs: 1 (#140, ready for review)
+  - Open issues: 0
+  - Open PRs: 0
 
 System Health: ✅ GREEN
-  ✓ All tests passing
+  ✓ All tests passing (33 commits synced)
   ✓ No warnings
-  ✓ PR ready for merge
+  ✓ Code clean
+  ✓ Ready for feature work
+
+Next Cycle: Ready to pick up feature work
 
 =============================================================================

TODO.md

@@ -1,4 +1,4 @@
-## Dev Loop Status: 2026-05-15 04:35 UTC
+## Dev Loop Status: 2026-05-15 02:28 UTC
 
 **Repository:** review-bot (rodin/review-bot on Gitea)  
 **Status:** ✅ OPTIMAL
@@ -15,28 +15,23 @@
 
 ### Recent Changes
 
-- ✅ Merged PR #140: test coverage improvements (44.6% → 49.3%)
-- ✅ PR #137 (doc-map feature) merged successfully with all reviews approved
+Last commit: `dcfd360` (2026-05-15 01:48) — health check post-sync
 
 ### Coverage
 
 | Package | Coverage |
 |---------|----------|
-| cmd/review-bot | 49.3% ↑ |
+| cmd/review-bot | 46.1% |
 | gitea | 85.2% |
 | github | 86.3% |
 | review | 92.0% |
 
-### Status Summary
-
-All recent feature work (doc-map, coverage improvements) successfully integrated. Repository is stable and ready for next development cycle.
-
 ### Next Priority
 
-- Continue increasing cmd/review-bot coverage (target: ≥60%)
+- Increase cmd/review-bot coverage (lowest at 46.1%)
 - Monitor prod logs for edge cases
 - VCS integration stable; GitHub + Gitea paths clear
 
 ---
 
-_Dev-loop cycle complete at 04:35 UTC._
+_Dev-loop cycle complete at 02:28 UTC._