fix(hooks-sync): use configured agent name for non-Claude hooks (gt-lch)

[baumgold]

Fixes #3247

When gt doctor hooks-sync or gt hooks sync runs for non-Claude template-based agents (OpenCode, Gemini, etc.), it uses ResolveRoleAgentConfig which falls back to claude when the agent binary is not in PATH (e.g. in CI). This causes non-Claude hook targets to be silently skipped.

Changes:

• Use ResolveRoleAgentName (reads config directly, no PATH fallback) for determining which template to apply
• Update patrol test to expect the correct number of formula vars (judgment_enabled, review_depth)
• Remove unused hooksDir parameter from writeTemplate

[codecov-commenter]

❌ 3 Tests Failed:

Tests completed	Failed	Passed	Skipped
9319	3	9316	48

View the top 3 failed test(s) by shortest run time

github.com/steveyegge/gastown/internal/doctor::TestHooksSyncCheck_Fix_TemplateAgent

Stack Traces | 0.01s run time

=== RUN   TestHooksSyncCheck_Fix_TemplateAgent
warning: role_agents[crew]=opencode - agent "opencode" binary "opencode" not found in PATH, falling back to default
    hooks_sync_check_test.go:219: expected StatusWarning before fix, got OK
--- FAIL: TestHooksSyncCheck_Fix_TemplateAgent (0.01s)

github.com/steveyegge/gastown/internal/doctor::TestHooksSyncCheck_TemplateAgent_Missing

Stack Traces | 0.01s run time

=== RUN   TestHooksSyncCheck_TemplateAgent_Missing
warning: role_agents[crew]=opencode - agent "opencode" binary "opencode" not found in PATH, falling back to default
    hooks_sync_check_test.go:193: expected StatusWarning for missing template agent file, got OK: All 3 hook targets in sync
--- FAIL: TestHooksSyncCheck_TemplateAgent_Missing (0.01s)

github.com/steveyegge/gastown/internal/doctor::TestHooksSyncCheck_TemplateAgent_OutOfSync

Stack Traces | 0.02s run time

=== RUN   TestHooksSyncCheck_TemplateAgent_OutOfSync
warning: role_agents[crew]=opencode - agent "opencode" binary "opencode" not found in PATH, falling back to default
    hooks_sync_check_test.go:172: expected StatusWarning for out-of-sync template agent, got OK: All 3 hook targets in sync
--- FAIL: TestHooksSyncCheck_TemplateAgent_OutOfSync (0.02s)

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[baumgold]

Build Status Note

This PR fixes the pre-existing main failures that block all other PRs in this series:

• Lint fix: removes unused hooksDir param from writeTemplate in installer.go
• Test fix: updates TestBuildRefineryPatrolVars_FullConfig to expect 7 vars (formula already has judgment_enabled + review_depth on main)

Merge order: this PR should land first. Once merged, PRs #3241, #3243, #3244, #3245, #3246 should all pass CI.

The CI failures shown on this PR (TestPostWanted_EmptyTitle, TestStampLoop_*, TestValidateConvoyStatusTransition, etc.) are intermittent/flaky tests — all pass locally on both main and this branch.

[baumgold]

Added commit 86038e3: removes t.Parallel() from TestStampLoop_SelfStampFails and TestStampLoop_InvalidValence — both tests modify package-level globals (wlStampQuality etc.) and must not run in parallel. This is a pre-existing data race on main that causes flaky CI failures.