ci: add Gitea Actions workflow with gofmt and test jobs

Add CI workflow at .gitea/workflows/ci.yml triggered on pull_request
with two jobs: fmt (gofmt check) and test (go test ./...).

Fix gofmt issues (import ordering) in 7 files so CI passes from
the start.

Fixes #7

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

internal/ai_client/client.go

@@ -9,10 +9,10 @@ import (
 	"strings"
 	"time"
 
+	"gorm.io/gorm"
 	"thuanle.me/claw-email-bridge/internal/config"
 	"thuanle.me/claw-email-bridge/internal/database"
 	"thuanle.me/claw-email-bridge/internal/logging"
-	"gorm.io/gorm"
 )
 
 // Retry backoff schedule: 1s, 5s, 15s.
@@ -20,11 +20,11 @@ var retryBackoffs = []time.Duration{1 * time.Second, 5 * time.Second, 15 * time.
 
 // openClawRequest is the payload sent to OpenClaw API.
 type openClawRequest struct {
-	Input      string            `json:"input"`
-	SessionID  string            `json:"session_id"`
-	History    []historyEntry    `json:"history,omitempty"`
-	CallbackURL string           `json:"callback_url"`
-	Metadata   map[string]string `json:"metadata"`
+	Input       string            `json:"input"`
+	SessionID   string            `json:"session_id"`
+	History     []historyEntry    `json:"history,omitempty"`
+	CallbackURL string            `json:"callback_url"`
+	Metadata    map[string]string `json:"metadata"`
 }
 
 type historyEntry struct {

internal/ai_client/client_test.go

@@ -130,9 +130,9 @@ func TestDispatch_UsesCallbackBaseURL(t *testing.T) {
 	defer mockServer.Close()
 
 	cfg := &config.Config{
-		OpenClawURL:      mockServer.URL,
-		ListenAddr:       ":9999",
-		CallbackBaseURL:  "https://bridge.example.com/",
+		OpenClawURL:     mockServer.URL,
+		ListenAddr:      ":9999",
+		CallbackBaseURL: "https://bridge.example.com/",
 	}
 
 	task := &database.Task{