chore: implement image template processing using git repo state (not enabled)

internal/gitutil/state.go

@@ -10,14 +10,14 @@ import (
 
 // GitState contains information about the Git repository state.
 type GitState struct {
+	// Date is the current commit datetime.
+	Date time.Time
 	// IsDirty indicates whether there are uncommitted changes.
 	IsDirty bool
 	// IsRepo indicates whether the directory is a Git repository.
 	IsRepo bool
 	// SHA is the full SHA-1 (40 characters) of the current commit.
 	SHA string
-	// Time is the current commit datetime.
-	Time time.Time
 }
 
 // InspectGitState inspects the Git repo state from the specified directory.
@@ -52,7 +52,7 @@ func InspectGitState(dir string) (GitState, error) {
 	if err != nil {
 		return state, fmt.Errorf("parse current commit timestamp: %w", err)
 	}
-	state.Time = time.Unix(seconds, 0)
+	state.Date = time.Unix(seconds, 0).UTC()
 
 	// Check for uncommitted changes.
 	status, err := gitCommand(dir, "status", "--porcelain")

internal/gitutil/state_test.go

@@ -22,7 +22,7 @@ func TestInspectGitState_GitNotAvailable(t *testing.T) {
 	assert.False(t, state.IsRepo)
 	assert.Empty(t, state.SHA)
 	assert.Empty(t, state.ShortSHA(7))
-	assert.True(t, state.Time.IsZero())
+	assert.True(t, state.Date.IsZero())
 	assert.False(t, state.IsDirty)
 }
 
@@ -42,7 +42,7 @@ func TestInspectGitState_NotARepo(t *testing.T) {
 	assert.False(t, state.IsRepo)
 	assert.Empty(t, state.SHA)
 	assert.Empty(t, state.ShortSHA(7))
-	assert.True(t, state.Time.IsZero()) // Should have zero time if not a repo.
+	assert.True(t, state.Date.IsZero()) // Should have zero time if not a repo.
 	assert.False(t, state.IsDirty)
 }
 
@@ -59,7 +59,7 @@ func TestInspectGitState_CleanRepo(t *testing.T) {
 	assert.True(t, state.IsRepo)
 	assert.Len(t, state.SHA, 40)
 	assert.Equal(t, state.ShortSHA(7), state.SHA[:7])
-	assert.False(t, state.Time.IsZero())
+	assert.False(t, state.Date.IsZero())
 	assert.False(t, state.IsDirty)
 }