refactor: align import blocks with upstream for remaining conflict files

Add missing upstream imports to 5 Go files to reduce import-section
merge conflicts.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

pkg/channels/qq/qq.go

@@ -3,7 +3,10 @@ package qq
 import (
 	"context"
 	"fmt"
+	"regexp"
+	"strings"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"github.com/tencent-connect/botgo"

pkg/heartbeat/service.go

@@ -7,6 +7,7 @@
 package heartbeat
 
 import (
+	"context"
 	"fmt"
 	"os"
 	"path/filepath"

pkg/skills/loader.go

@@ -10,6 +10,11 @@ import (
 	"regexp"
 	"strings"
 
+	"github.com/gomarkdown/markdown"
+	"github.com/gomarkdown/markdown/ast"
+	"github.com/gomarkdown/markdown/parser"
+	"gopkg.in/yaml.v3"
+
 	"github.com/sipeed/picoclaw/pkg/logger"
 )
 

pkg/tools/filesystem.go

@@ -2,14 +2,20 @@ package tools
 
 import (
 	"context"
+	"errors"
 	"fmt"
+	"io"
 	"io/fs"
+	"math"
 	"os"
 	"path/filepath"
+	"regexp"
+	"strconv"
 	"strings"
 	"time"
 
 	"github.com/sipeed/picoclaw/pkg/fileutil"
+	"github.com/sipeed/picoclaw/pkg/logger"
 )
 
 // validatePath ensures the given path is within the workspace if restrict is true.

pkg/tools/web.go

@@ -4,12 +4,15 @@ import (
 	"bytes"
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
+	"net"
 	"net/http"
 	"net/url"
 	"regexp"
 	"strings"
+	"sync/atomic"
 	"time"
 )