diff --git a/backend/internal/http/router.go b/backend/internal/http/router.go
index 481d422..ef35de2 100644
--- a/backend/internal/http/router.go
+++ b/backend/internal/http/router.go
@@ -111,6 +111,7 @@ func NewRouter(cfg config.Config, manager *service.Manager) *gin.Engine {
 		api.POST("/releases", handler.saveRelease)
 
 		api.GET("/builds", handler.listBuilds)
+		api.GET("/builds/:id", handler.getBuild)
 		api.POST("/builds", handler.createBuild)
 
 		api.GET("/release-runs", handler.listReleaseRuns)
@@ -287,6 +288,15 @@ func (h *routerHandler) listBuilds(c *gin.Context) {
 	c.JSON(http.StatusOK, data)
 }
 
+func (h *routerHandler) getBuild(c *gin.Context) {
+	data, err := h.manager.GetBuild(c.Request.Context(), uintFromParam(c.Param("id")))
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, data)
+}
+
 func (h *routerHandler) createBuild(c *gin.Context) {
 	var payload buildPayload
 	if err := c.ShouldBindJSON(&payload); err != nil {
diff --git a/backend/internal/model/models.go b/backend/internal/model/models.go
index 4328b3e..ef22ef2 100644
--- a/backend/internal/model/models.go
+++ b/backend/internal/model/models.go
@@ -80,6 +80,7 @@ type BuildJob struct {
 	COSKey       string     `gorm:"size:255" json:"cos_key"`
 	ArtifactURL  string     `gorm:"size:255" json:"artifact_url"`
 	SHA256       string     `gorm:"size:128" json:"sha256"`
+	LogOutput    string     `gorm:"type:text" json:"log_output"`
 	LogExcerpt   string     `gorm:"type:text" json:"log_excerpt"`
 	ErrorMessage string     `gorm:"type:text" json:"error_message"`
 	StartedAt    *time.Time `json:"started_at"`
diff --git a/backend/internal/orchestrator/executor.go b/backend/internal/orchestrator/executor.go
index 8d93814..e3fa0da 100644
--- a/backend/internal/orchestrator/executor.go
+++ b/backend/internal/orchestrator/executor.go
@@ -1,10 +1,12 @@
 package orchestrator
 
 import (
+	"bufio"
 	"bytes"
 	"context"
 	"encoding/json"
 	"fmt"
+	"io"
 	"os/exec"
 	"strings"
 
@@ -25,6 +27,7 @@ type BuildContext struct {
 	ServiceName string
 	ReleaseID   string
 	Branch      string
+	OnOutput    func(string)
 }
 
 type BuildResult struct {
@@ -142,11 +145,36 @@ func (e *ScriptBuildExecutor) Build(ctx context.Context, buildCtx BuildContext)
 		command.Dir = e.workDir
 	}
 
-	var output bytes.Buffer
-	command.Stdout = &output
-	command.Stderr = &output
+	stdout, err := command.StdoutPipe()
+	if err != nil {
+		return result, "", err
+	}
+	command.Stderr = command.Stdout
 
-	err := command.Run()
+	var output bytes.Buffer
+	if err := command.Start(); err != nil {
+		return result, "", err
+	}
+
+	reader := bufio.NewReader(stdout)
+	for {
+		chunk, readErr := reader.ReadString('\n')
+		if chunk != "" {
+			output.WriteString(chunk)
+			if buildCtx.OnOutput != nil {
+				buildCtx.OnOutput(chunk)
+			}
+		}
+		if readErr == nil {
+			continue
+		}
+		if readErr == io.EOF {
+			break
+		}
+		return result, output.String(), readErr
+	}
+
+	err = command.Wait()
 	raw := output.String()
 
 	for _, line := range strings.Split(raw, "\n") {
diff --git a/backend/internal/service/manager.go b/backend/internal/service/manager.go
index 1e132d5..1f47c83 100644
--- a/backend/internal/service/manager.go
+++ b/backend/internal/service/manager.go
@@ -157,25 +157,71 @@ func (m *Manager) ProcessBuild(ctx context.Context, buildID uint) error {
 	if err := m.db.WithContext(ctx).Model(&model.BuildJob{}).
 		Where("id = ?", buildID).
 		Updates(map[string]any{
-			"status":     model.BuildRunning,
-			"started_at": &startedAt,
+			"status":        model.BuildRunning,
+			"started_at":    &startedAt,
+			"log_output":    "",
+			"log_excerpt":   "",
+			"error_message": "",
 		}).Error; err != nil {
 		return err
 	}
 
+	var liveOutput strings.Builder
+	lastPersistedAt := time.Now()
+	lastPersistedLen := 0
+	persistLiveOutput := func(force bool) {
+		raw := liveOutput.String()
+		if !force {
+			if len(raw) == lastPersistedLen {
+				return
+			}
+			if time.Since(lastPersistedAt) < time.Second && len(raw)-lastPersistedLen < 1024 {
+				return
+			}
+		}
+		if err := m.db.Model(&model.BuildJob{}).
+			Where("id = ?", buildID).
+			Updates(map[string]any{
+				"log_output":  raw,
+				"log_excerpt": trimLog(raw),
+			}).Error; err != nil {
+			log.Printf("persist build log %d: %v", buildID, err)
+			return
+		}
+		lastPersistedAt = time.Now()
+		lastPersistedLen = len(raw)
+	}
+
 	result, output, err := m.buildExecutor.Build(ctx, orchestrator.BuildContext{
 		ServiceName: buildJob.ServiceName,
 		ReleaseID:   buildJob.ReleaseID,
 		Branch:      buildJob.Branch,
+		OnOutput: func(chunk string) {
+			if chunk == "" {
+				return
+			}
+			liveOutput.WriteString(chunk)
+			persistLiveOutput(false)
+		},
 	})
+	rawOutput := output
+	if rawOutput == "" {
+		rawOutput = liveOutput.String()
+	}
+	if rawOutput != "" && liveOutput.Len() == 0 {
+		liveOutput.WriteString(rawOutput)
+	}
+	persistLiveOutput(true)
+
 	finishedAt := time.Now()
 	if err != nil {
 		return m.db.WithContext(ctx).Model(&model.BuildJob{}).
 			Where("id = ?", buildID).
 			Updates(map[string]any{
 				"status":        model.BuildFailed,
-				"log_excerpt":   trimLog(output),
-				"error_message": err.Error(),
+				"log_output":    rawOutput,
+				"log_excerpt":   trimLog(rawOutput),
+				"error_message": summarizeBuildError(err, rawOutput),
 				"finished_at":   &finishedAt,
 			}).Error
 	}
@@ -193,7 +239,8 @@ func (m *Manager) ProcessBuild(ctx context.Context, buildID uint) error {
 				"cos_key":      result.COSKey,
 				"artifact_url": result.ArtifactURL,
 				"sha256":       result.SHA256,
-				"log_excerpt":  trimLog(output),
+				"log_output":   rawOutput,
+				"log_excerpt":  trimLog(rawOutput),
 				"finished_at":  &finishedAt,
 			}).Error; err != nil {
 			return err
@@ -850,6 +897,20 @@ func trimLog(raw string) string {
 	return raw[len(raw)-maxLen:]
 }
 
+func summarizeBuildError(err error, output string) string {
+	lines := strings.Split(output, "\n")
+	for i := len(lines) - 1; i >= 0; i-- {
+		line := strings.TrimSpace(lines[i])
+		if line == "" || strings.HasPrefix(line, "BUILD_RESULT_JSON=") {
+			continue
+		}
+		if line != err.Error() {
+			return line
+		}
+	}
+	return err.Error()
+}
+
 func deploymentLogExcerpt(deployment *model.Deployment) string {
 	if deployment == nil {
 		return ""
diff --git a/frontend/src/api/client.ts b/frontend/src/api/client.ts
index 5cdc3fe..71c3968 100644
--- a/frontend/src/api/client.ts
+++ b/frontend/src/api/client.ts
@@ -30,6 +30,7 @@ export const api = {
   listReleases: async (serviceName?: string) => (await client.get<Release[]>('/releases', { params: { service_name: serviceName } })).data,
   saveRelease: async (payload: Partial<Release>) => (await client.post<Release>('/releases', payload)).data,
   listBuilds: async () => (await client.get<BuildJob[]>('/builds')).data,
+  getBuild: async (id: number) => (await client.get<BuildJob>(`/builds/${id}`)).data,
   createBuild: async (payload: Record<string, unknown>) => (await client.post<BuildJob>('/builds', payload)).data,
   listReleaseRuns: async () => (await client.get<ReleaseRun[]>('/release-runs')).data,
   getReleaseRun: async (id: number) => (await client.get<ReleaseRun>(`/release-runs/${id}`)).data,
diff --git a/frontend/src/pages/BuildsPage.tsx b/frontend/src/pages/BuildsPage.tsx
index 00558ad..3918bfe 100644
--- a/frontend/src/pages/BuildsPage.tsx
+++ b/frontend/src/pages/BuildsPage.tsx
@@ -1,23 +1,26 @@
 import {
-    Alert,
-    Button,
-    Card,
-    CardContent,
-    Dialog,
-    DialogActions,
-    DialogContent,
-    DialogTitle,
-    MenuItem,
-    Snackbar,
-    Stack,
-    Table,
-    TableBody,
-    TableCell,
-    TableContainer,
-    TableHead,
-    TableRow,
-    TextField,
-    Typography
+  Alert,
+  Box,
+  Button,
+  Card,
+  CardContent,
+  Chip,
+  CircularProgress,
+  Dialog,
+  DialogActions,
+  DialogContent,
+  DialogTitle,
+  MenuItem,
+  Snackbar,
+  Stack,
+  Table,
+  TableBody,
+  TableCell,
+  TableContainer,
+  TableHead,
+  TableRow,
+  TextField,
+  Typography
 } from '@mui/material'
 import { useEffect, useMemo, useState } from 'react'
 
@@ -26,191 +29,353 @@ import StatusChip from '@/components/StatusChip'
 import type { BuildJob, CatalogService } from '@/types'
 
 type FormState = {
-    service_name: string
-    release_id: string
-    branch: string
-    operator: string
+  service_name: string
+  release_id: string
+  branch: string
+  operator: string
 }
 
 const defaultOperator = 'platform-admin'
+const activeBuildStatuses = new Set(['queued', 'running'])
+
+function formatDateTime(value?: string) {
+  if (!value) return '-'
+  return new Date(value).toLocaleString()
+}
 
 export default function BuildsPage() {
-    const [builds, setBuilds] = useState<BuildJob[]>([])
-    const [services, setServices] = useState<CatalogService[]>([])
-    const [open, setOpen] = useState(false)
-    const [message, setMessage] = useState('')
-    const [form, setForm] = useState<FormState>({
-        service_name: '',
-        release_id: '',
-        branch: 'main',
-        operator: defaultOperator
+  const [builds, setBuilds] = useState<BuildJob[]>([])
+  const [services, setServices] = useState<CatalogService[]>([])
+  const [open, setOpen] = useState(false)
+  const [detailOpen, setDetailOpen] = useState(false)
+  const [selectedBuildID, setSelectedBuildID] = useState<number | null>(null)
+  const [buildDetail, setBuildDetail] = useState<BuildJob | null>(null)
+  const [detailLoading, setDetailLoading] = useState(false)
+  const [message, setMessage] = useState('')
+  const [error, setError] = useState('')
+  const [form, setForm] = useState<FormState>({
+    service_name: '',
+    release_id: '',
+    branch: 'main',
+    operator: defaultOperator
+  })
+
+  const selectedService = useMemo(
+    () => services.find((service) => service.name === form.service_name),
+    [form.service_name, services]
+  )
+
+  const selectedBuild = useMemo(() => {
+    if (buildDetail && buildDetail.id === selectedBuildID) {
+      return buildDetail
+    }
+    return builds.find((build) => build.id === selectedBuildID) ?? null
+  }, [buildDetail, builds, selectedBuildID])
+
+  const resetForm = (catalog: CatalogService[]) => {
+    const first = catalog[0]
+    setForm({
+      service_name: first?.name ?? '',
+      release_id: '',
+      branch: first?.default_branch ?? 'main',
+      operator: defaultOperator
     })
+  }
 
-    const selectedService = useMemo(
-        () => services.find((service) => service.name === form.service_name),
-        [form.service_name, services]
-    )
+  const upsertBuild = (build: BuildJob) => {
+    setBuilds((prev) => {
+      const exists = prev.some((item) => item.id === build.id)
+      if (!exists) {
+        return [build, ...prev]
+      }
+      return prev.map((item) => (item.id === build.id ? build : item))
+    })
+  }
 
-    const resetForm = (catalog: CatalogService[]) => {
-        const first = catalog[0]
-        setForm({
-            service_name: first?.name ?? '',
-            release_id: '',
-            branch: first?.default_branch ?? 'main',
-            operator: defaultOperator
-        })
+  const load = async () => {
+    const [buildRows, catalog] = await Promise.all([api.listBuilds(), api.listServices()])
+    setBuilds(buildRows)
+    setServices(catalog)
+    if (!form.service_name && catalog.length > 0) {
+      resetForm(catalog)
+    }
+  }
+
+  const loadBuildDetail = async (buildID: number, showLoader = false) => {
+    if (showLoader) {
+      setDetailLoading(true)
+    }
+    try {
+      const build = await api.getBuild(buildID)
+      setBuildDetail(build)
+      upsertBuild(build)
+    } catch (err) {
+      setError(err instanceof Error ? err.message : '加载构建日志失败')
+    } finally {
+      if (showLoader) {
+        setDetailLoading(false)
+      }
+    }
+  }
+
+  useEffect(() => {
+    void load()
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [])
+
+  useEffect(() => {
+    if (!detailOpen || !selectedBuildID) return
+
+    void loadBuildDetail(selectedBuildID, true)
+
+    if (!selectedBuild || !activeBuildStatuses.has(selectedBuild.status)) {
+      return
     }
 
-    const load = async () => {
-        const [buildRows, catalog] = await Promise.all([api.listBuilds(), api.listServices()])
-        setBuilds(buildRows)
-        setServices(catalog)
-        if (!form.service_name && catalog.length > 0) {
-            resetForm(catalog)
-        }
+    const timer = window.setInterval(() => {
+      void loadBuildDetail(selectedBuildID)
+    }, 2000)
+
+    return () => window.clearInterval(timer)
+  }, [detailOpen, selectedBuildID, selectedBuild?.status])
+
+  const createBuild = async () => {
+    try {
+      const created = await api.createBuild(form)
+      setOpen(false)
+      resetForm(services)
+      setMessage('构建任务已创建，已打开实时构建日志')
+      setSelectedBuildID(created.id)
+      setBuildDetail(created)
+      setDetailOpen(true)
+      upsertBuild(created)
+      await load()
+    } catch (err) {
+      setError(err instanceof Error ? err.message : '创建构建任务失败')
     }
+  }
 
-    useEffect(() => {
-        void load()
-        // eslint-disable-next-line react-hooks/exhaustive-deps
-    }, [])
+  const openBuildDetail = (buildID: number) => {
+    setSelectedBuildID(buildID)
+    setBuildDetail(null)
+    setDetailOpen(true)
+  }
 
-    const createBuild = async () => {
-        await api.createBuild(form)
-        setOpen(false)
-        resetForm(services)
-        setMessage('构建任务已创建，后台会自动拉取仓库、构建并上传 COS')
-        await load()
-    }
+  return (
+    <Stack spacing={3}>
+      <Card>
+        <CardContent>
+          <Stack direction={{ xs: 'column', sm: 'row' }} spacing={1.5}>
+            <Button
+              variant="contained"
+              onClick={() => {
+                resetForm(services)
+                setOpen(true)
+              }}
+            >
+              新建构建
+            </Button>
+            <Button variant="outlined" onClick={() => void load()}>
+              刷新
+            </Button>
+          </Stack>
+        </CardContent>
+      </Card>
 
-    return (
-        <Stack spacing={3}>
-            <Card>
-                <CardContent>
-                    <Stack direction={{ xs: 'column', sm: 'row' }} spacing={1.5}>
-                        <Button
-                            variant="contained"
-                            onClick={() => {
-                                resetForm(services)
-                                setOpen(true)
-                            }}
-                        >
-                            新建构建
-                        </Button>
-                        <Button variant="outlined" onClick={() => void load()}>
-                            刷新
-                        </Button>
-                    </Stack>
-                </CardContent>
-            </Card>
+      <Card>
+        <CardContent>
+          <Typography className="section-title" sx={{ mb: 2 }}>
+            构建记录
+          </Typography>
+          <TableContainer>
+            <Table>
+              <TableHead>
+                <TableRow>
+                  <TableCell>ID</TableCell>
+                  <TableCell>服务</TableCell>
+                  <TableCell>版本</TableCell>
+                  <TableCell>分支</TableCell>
+                  <TableCell>状态</TableCell>
+                  <TableCell>提交</TableCell>
+                  <TableCell>构建机</TableCell>
+                  <TableCell>错误摘要</TableCell>
+                  <TableCell align="right">动作</TableCell>
+                </TableRow>
+              </TableHead>
+              <TableBody>
+                {builds.map((row) => (
+                  <TableRow key={row.id}>
+                    <TableCell>{row.id}</TableCell>
+                    <TableCell>{row.service_name}</TableCell>
+                    <TableCell>{row.release_id}</TableCell>
+                    <TableCell>{row.branch}</TableCell>
+                    <TableCell>
+                      <StatusChip status={row.status} />
+                    </TableCell>
+                    <TableCell>{row.commit_sha || '-'}</TableCell>
+                    <TableCell>{row.build_host || '-'}</TableCell>
+                    <TableCell sx={{ maxWidth: 360 }}>
+                      <Typography variant="body2" color="text.secondary" sx={{ whiteSpace: 'pre-wrap', wordBreak: 'break-word' }}>
+                        {row.error_message || '-'}
+                      </Typography>
+                    </TableCell>
+                    <TableCell align="right">
+                      <Button size="small" onClick={() => openBuildDetail(row.id)}>
+                        查看日志
+                      </Button>
+                    </TableCell>
+                  </TableRow>
+                ))}
+              </TableBody>
+            </Table>
+          </TableContainer>
+        </CardContent>
+      </Card>
 
-            <Card>
-                <CardContent>
-                    <Typography className="section-title" sx={{ mb: 2 }}>
-                        构建记录
-                    </Typography>
-                    <TableContainer>
-                        <Table>
-                            <TableHead>
-                                <TableRow>
-                                    <TableCell>ID</TableCell>
-                                    <TableCell>服务</TableCell>
-                                    <TableCell>版本</TableCell>
-                                    <TableCell>分支</TableCell>
-                                    <TableCell>状态</TableCell>
-                                    <TableCell>提交</TableCell>
-                                    <TableCell>构建机</TableCell>
-                                    <TableCell>COS Key</TableCell>
-                                </TableRow>
-                            </TableHead>
-                            <TableBody>
-                                {builds.map((row) => (
-                                    <TableRow key={row.id}>
-                                        <TableCell>{row.id}</TableCell>
-                                        <TableCell>{row.service_name}</TableCell>
-                                        <TableCell>{row.release_id}</TableCell>
-                                        <TableCell>{row.branch}</TableCell>
-                                        <TableCell>
-                                            <StatusChip status={row.status} />
-                                        </TableCell>
-                                        <TableCell>{row.commit_sha || '-'}</TableCell>
-                                        <TableCell>{row.build_host || '-'}</TableCell>
-                                        <TableCell sx={{ maxWidth: 420, wordBreak: 'break-all' }}>{row.cos_key || '-'}</TableCell>
-                                    </TableRow>
-                                ))}
-                            </TableBody>
-                        </Table>
-                    </TableContainer>
-                </CardContent>
-            </Card>
+      <Dialog open={open} onClose={() => setOpen(false)} fullWidth maxWidth="sm">
+        <DialogTitle>新建构建任务</DialogTitle>
+        <DialogContent>
+          <Stack spacing={2} sx={{ mt: 1 }}>
+            <TextField
+              select
+              label="微服务"
+              value={form.service_name}
+              onChange={(event) => {
+                const serviceName = event.target.value
+                const serviceMeta = services.find((item) => item.name === serviceName)
+                setForm((prev) => ({
+                  ...prev,
+                  service_name: serviceName,
+                  branch: serviceMeta?.default_branch ?? prev.branch
+                }))
+              }}
+            >
+              {services.map((service) => (
+                <MenuItem key={service.name} value={service.name}>
+                  {service.name}
+                </MenuItem>
+              ))}
+            </TextField>
+            <TextField
+              label="Release ID"
+              placeholder="例如 20260407-abc1234"
+              value={form.release_id}
+              onChange={(event) => setForm((prev) => ({ ...prev, release_id: event.target.value }))}
+            />
+            <TextField
+              label="分支"
+              value={form.branch}
+              onChange={(event) => setForm((prev) => ({ ...prev, branch: event.target.value }))}
+            />
+            <TextField
+              label="操作人"
+              value={form.operator}
+              onChange={(event) => setForm((prev) => ({ ...prev, operator: event.target.value }))}
+            />
+            <TextField label="仓库" value={selectedService?.repo ?? ''} slotProps={{ input: { readOnly: true } }} />
+            <Typography variant="body2" color="text.secondary">
+              平台会先在构建机本地源码目录中自动查找匹配仓库；找到后执行 `git fetch / checkout / pull`。如果本地没有对应仓库，再自动克隆到构建工作区。
+            </Typography>
+          </Stack>
+        </DialogContent>
+        <DialogActions>
+          <Button onClick={() => setOpen(false)}>取消</Button>
+          <Button
+            variant="contained"
+            disabled={!form.service_name || !form.release_id || !form.branch}
+            onClick={() => void createBuild()}
+          >
+            开始构建
+          </Button>
+        </DialogActions>
+      </Dialog>
 
-            <Dialog open={open} onClose={() => setOpen(false)} fullWidth maxWidth="sm">
-                <DialogTitle>新建构建任务</DialogTitle>
-                <DialogContent>
-                    <Stack spacing={2} sx={{ mt: 1 }}>
-                        <TextField
-                            select
-                            label="微服务"
-                            value={form.service_name}
-                            onChange={(event) => {
-                                const serviceName = event.target.value
-                                const serviceMeta = services.find((item) => item.name === serviceName)
-                                setForm((prev) => ({
-                                    ...prev,
-                                    service_name: serviceName,
-                                    branch: serviceMeta?.default_branch ?? prev.branch
-                                }))
-                            }}
-                        >
-                            {services.map((service) => (
-                                <MenuItem key={service.name} value={service.name}>
-                                    {service.name}
-                                </MenuItem>
-                            ))}
-                        </TextField>
-                        <TextField
-                            label="Release ID"
-                            placeholder="例如 20260407-abc1234"
-                            value={form.release_id}
-                            onChange={(event) => setForm((prev) => ({ ...prev, release_id: event.target.value }))}
-                        />
-                        <TextField
-                            label="分支"
-                            value={form.branch}
-                            onChange={(event) => setForm((prev) => ({ ...prev, branch: event.target.value }))}
-                        />
-                        <TextField
-                            label="操作人"
-                            value={form.operator}
-                            onChange={(event) => setForm((prev) => ({ ...prev, operator: event.target.value }))}
-                        />
-                        <TextField
-                            label="仓库"
-                            value={selectedService?.repo ?? ''}
-                            slotProps={{ input: { readOnly: true } }}
-                        />
-                        <Typography variant="body2" color="text.secondary">
-                            平台会先在构建机本地源码目录中自动查找匹配仓库；找到后执行 `git fetch / checkout / pull`。如果本地没有对应仓库，再自动克隆到构建工作区。
-                        </Typography>
-                    </Stack>
-                </DialogContent>
-                <DialogActions>
-                    <Button onClick={() => setOpen(false)}>取消</Button>
-                    <Button
-                        variant="contained"
-                        disabled={!form.service_name || !form.release_id || !form.branch}
-                        onClick={() => void createBuild()}
-                    >
-                        开始构建
-                    </Button>
-                </DialogActions>
-            </Dialog>
+      <Dialog open={detailOpen} onClose={() => setDetailOpen(false)} fullWidth maxWidth="lg">
+        <DialogTitle>构建日志</DialogTitle>
+        <DialogContent dividers>
+          {detailLoading && !selectedBuild ? (
+            <Stack alignItems="center" justifyContent="center" sx={{ py: 8 }}>
+              <CircularProgress size={28} />
+            </Stack>
+          ) : selectedBuild ? (
+            <Stack spacing={2}>
+              <Stack direction={{ xs: 'column', lg: 'row' }} spacing={1.5} justifyContent="space-between">
+                <Stack spacing={1}>
+                  <Typography variant="h6">{`${selectedBuild.service_name} · ${selectedBuild.release_id}`}</Typography>
+                  <Stack direction="row" spacing={1} useFlexGap flexWrap="wrap">
+                    <Chip size="small" variant="outlined" label={`分支 ${selectedBuild.branch || '-'}`} />
+                    <Chip size="small" variant="outlined" label={`提交 ${selectedBuild.commit_sha || '-'}`} />
+                    <Chip size="small" variant="outlined" label={`构建机 ${selectedBuild.build_host || '-'}`} />
+                    <Chip size="small" variant="outlined" label={`开始 ${formatDateTime(selectedBuild.started_at || selectedBuild.created_at)}`} />
+                    <Chip size="small" variant="outlined" label={`结束 ${formatDateTime(selectedBuild.finished_at)}`} />
+                  </Stack>
+                </Stack>
+                <Stack direction="row" spacing={1} alignItems="center">
+                  <StatusChip status={selectedBuild.status} />
+                  <Button variant="outlined" onClick={() => selectedBuildID && void loadBuildDetail(selectedBuildID, true)}>
+                    立即刷新
+                  </Button>
+                </Stack>
+              </Stack>
 
-            <Snackbar open={Boolean(message)} autoHideDuration={2600} onClose={() => setMessage('')}>
-                <Alert severity="success" variant="filled">
-                    {message}
+              {activeBuildStatuses.has(selectedBuild.status) ? (
+                <Alert severity="info" variant="outlined">
+                  当前任务仍在执行，日志会每 2 秒自动刷新。
                 </Alert>
-            </Snackbar>
-        </Stack>
-    )
+              ) : null}
+
+              {selectedBuild.error_message ? (
+                <Alert severity="error" variant="filled">
+                  {selectedBuild.error_message}
+                </Alert>
+              ) : null}
+
+              <Box
+                component="pre"
+                sx={{
+                  m: 0,
+                  p: 2,
+                  maxHeight: 560,
+                  overflow: 'auto',
+                  borderRadius: 3,
+                  whiteSpace: 'pre-wrap',
+                  wordBreak: 'break-word',
+                  fontSize: 13,
+                  lineHeight: 1.7,
+                  fontFamily: '"SFMono-Regular", "Roboto Mono", "Menlo", monospace',
+                  backgroundColor: 'rgba(16,24,40,0.98)',
+                  color: 'rgb(231, 239, 255)'
+                }}
+              >
+                {selectedBuild.log_output || selectedBuild.log_excerpt || '暂无日志输出'}
+              </Box>
+
+              <Typography variant="body2" color="text.secondary" sx={{ wordBreak: 'break-all' }}>
+                COS Key: {selectedBuild.cos_key || '-'}
+              </Typography>
+            </Stack>
+          ) : (
+            <Alert severity="warning" variant="outlined">
+              未找到该构建任务。
+            </Alert>
+          )}
+        </DialogContent>
+        <DialogActions>
+          <Button onClick={() => setDetailOpen(false)}>关闭</Button>
+        </DialogActions>
+      </Dialog>
+
+      <Snackbar open={Boolean(message)} autoHideDuration={2600} onClose={() => setMessage('')}>
+        <Alert severity="success" variant="filled">
+          {message}
+        </Alert>
+      </Snackbar>
+
+      <Snackbar open={Boolean(error)} autoHideDuration={4000} onClose={() => setError('')}>
+        <Alert severity="error" variant="filled">
+          {error}
+        </Alert>
+      </Snackbar>
+    </Stack>
+  )
 }
diff --git a/frontend/src/types/index.ts b/frontend/src/types/index.ts
index e9324a9..1237533 100644
--- a/frontend/src/types/index.ts
+++ b/frontend/src/types/index.ts
@@ -51,6 +51,7 @@ export interface BuildJob {
   cos_key: string
   artifact_url: string
   sha256: string
+  log_output: string
   log_excerpt: string
   error_message: string
   created_at?: string
diff --git a/ops-scripts/build_operator.py b/ops-scripts/build_operator.py
index 63144b4..92e3d56 100644
--- a/ops-scripts/build_operator.py
+++ b/ops-scripts/build_operator.py
@@ -47,6 +47,18 @@ def normalize_remote(remote: str) -> str:
     return value.strip("/").lower()
 
 
+def git_host(remote: str) -> str:
+    value = remote.strip()
+    if not value:
+        return ""
+    if value.startswith("git@") and ":" in value:
+        return value.split("@", 1)[1].split(":", 1)[0].strip().lower()
+    parsed = urlparse(value)
+    if parsed.netloc:
+        return parsed.netloc.strip().lower()
+    return ""
+
+
 def run_command(
     argv: list[str],
     *,
@@ -55,19 +67,29 @@ def run_command(
     allow_failure: bool = False,
 ) -> subprocess.CompletedProcess[str]:
     log(f"run: {' '.join(argv)}")
-    proc = subprocess.run(
+    proc = subprocess.Popen(
         argv,
         cwd=str(cwd) if cwd else None,
         env=env,
         text=True,
         stdout=subprocess.PIPE,
         stderr=subprocess.STDOUT,
+        bufsize=1,
     )
-    if proc.stdout:
-        print(proc.stdout, end="")
-    if proc.returncode != 0 and not allow_failure:
-        raise RuntimeError(f"command failed ({proc.returncode}): {' '.join(argv)}")
-    return proc
+
+    output_parts: list[str] = []
+    assert proc.stdout is not None
+    for line in proc.stdout:
+        output_parts.append(line)
+        print(line, end="", flush=True)
+
+    returncode = proc.wait()
+    stdout = "".join(output_parts)
+    completed = subprocess.CompletedProcess(argv, returncode, stdout)
+
+    if returncode != 0 and not allow_failure:
+        raise RuntimeError(f"command failed ({returncode}): {' '.join(argv)}")
+    return completed
 
 
 class BuildOperator:
@@ -158,6 +180,10 @@ class BuildOperator:
         env["CGO_ENABLED"] = "0"
         env["GOOS"] = "linux"
         env["GOARCH"] = "amd64"
+        private_host = git_host(self.repo_url) or git_host(str(self.global_build_cfg.get("gitea_clone_prefix", "")))
+        if private_host:
+            env.setdefault("GOPRIVATE", private_host)
+            env.setdefault("GONOSUMDB", private_host)
         if self.git_ssh_command:
             env["GIT_SSH_COMMAND"] = self.git_ssh_command
         return env