chore(openspec): archive sqlite change, consolidate legacy archives, and sync delta specs

Archive the completed sqlite-database-support change and consolidate
older archived changes into 5 functional groups (file-storage, foundation,
notification, org-structure, system-governance). Sync delta specs with
new and updated spec files. Refactor timezone resolution into a pure
function for improved testability.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: gqcn

apps/lina-core/internal/service/config/config_protected_settings_test.go

@@ -6,7 +6,6 @@ package config
 import (
 	"context"
 	"testing"
-	"time"
 )
 
 // TestRuntimeParamSpecsReturnsCopy verifies callers cannot mutate the shared
@@ -148,44 +147,23 @@ func TestProtectedConfigHelpersPreferOverridesAndFallbackDefaults(t *testing.T)
 // TestResolveCurrentSystemTimezoneUsesEnvironment verifies a valid TZ
 // environment variable is exposed directly to the frontend.
 func TestResolveCurrentSystemTimezoneUsesEnvironment(t *testing.T) {
-	t.Setenv("TZ", "Asia/Tokyo")
-	oldLocal := time.Local
-	time.Local = time.UTC
-	t.Cleanup(func() {
-		time.Local = oldLocal
-	})
-
-	if timezone := resolveCurrentSystemTimezone(); timezone != "Asia/Tokyo" {
+	if timezone := resolveSystemTimezone("Asia/Tokyo", "UTC"); timezone != "Asia/Tokyo" {
 		t.Fatalf("expected timezone from TZ environment, got %q", timezone)
 	}
 }
 
 // TestResolveCurrentSystemTimezoneFallsBackToProcessLocation verifies the
 // process location is used when TZ is invalid.
 func TestResolveCurrentSystemTimezoneFallsBackToProcessLocation(t *testing.T) {
-	t.Setenv("TZ", "Invalid/Timezone")
-	oldLocal := time.Local
-	time.Local = time.UTC
-	t.Cleanup(func() {
-		time.Local = oldLocal
-	})
-
-	if timezone := resolveCurrentSystemTimezone(); timezone != "UTC" {
+	if timezone := resolveSystemTimezone("Invalid/Timezone", "UTC"); timezone != "UTC" {
 		t.Fatalf("expected timezone fallback to process location UTC, got %q", timezone)
 	}
 }
 
 // TestResolveCurrentSystemTimezoneUsesProjectDefault verifies the helper uses
 // the project default when both environment and process location are local.
 func TestResolveCurrentSystemTimezoneUsesProjectDefault(t *testing.T) {
-	t.Setenv("TZ", "")
-	oldLocal := time.Local
-	time.Local = time.FixedZone("Local", 0)
-	t.Cleanup(func() {
-		time.Local = oldLocal
-	})
-
-	if timezone := resolveCurrentSystemTimezone(); timezone != "Asia/Shanghai" {
+	if timezone := resolveSystemTimezone("", "Local"); timezone != "Asia/Shanghai" {
 		t.Fatalf("expected project default timezone Asia/Shanghai, got %q", timezone)
 	}
 }

apps/lina-core/internal/service/config/config_public_frontend.go

@@ -379,12 +379,17 @@ func (s *serviceImpl) GetPublicFrontend(ctx context.Context) (*PublicFrontendCon
 
 // resolveCurrentSystemTimezone returns the host timezone identifier exposed to the frontend.
 func resolveCurrentSystemTimezone() string {
-	if timezone := strings.TrimSpace(os.Getenv("TZ")); timezone != "" && timezone != "Local" {
+	return resolveSystemTimezone(os.Getenv("TZ"), time.Now().Location().String())
+}
+
+// resolveSystemTimezone selects the first valid system timezone candidate.
+func resolveSystemTimezone(envTimezone string, processTimezone string) string {
+	if timezone := strings.TrimSpace(envTimezone); timezone != "" && timezone != "Local" {
 		if _, err := time.LoadLocation(timezone); err == nil {
 			return timezone
 		}
 	}
-	if timezone := strings.TrimSpace(time.Now().Location().String()); timezone != "" && timezone != "Local" {
+	if timezone := strings.TrimSpace(processTimezone); timezone != "" && timezone != "Local" {
 		if _, err := time.LoadLocation(timezone); err == nil {
 			return timezone
 		}