diff --git a/backend/app/db/session.py b/backend/app/db/session.py
index ea95933a..751003a4 100644
--- a/backend/app/db/session.py
+++ b/backend/app/db/session.py
@@ -150,7 +150,7 @@ DEFAULT_LOGIN_USERS = (
     {
         "username": "linkong",
         "email": "linkong@planet.local",
-        "password": "12345678",
+        "password": "LK12345678",
         "role": "super_admin",
     },
 )
diff --git a/backend/scripts/create_admin.py b/backend/scripts/create_admin.py
index f2a1ae4c..bf59e84c 100644
--- a/backend/scripts/create_admin.py
+++ b/backend/scripts/create_admin.py
@@ -18,7 +18,7 @@ async def create_admin():
 
         if existing_user:
             print("用户 linkong 已存在，更新密码...")
-            existing_user.set_password("12345678")
+            existing_user.set_password("LK12345678")
             existing_user.role = "super_admin"
             existing_user.email = "linkong@planet.local"
         else:
@@ -26,7 +26,7 @@ async def create_admin():
             user = User(
                 username="linkong",
                 email="linkong@planet.local",
-                password_hash=get_password_hash("12345678"),
+                password_hash=get_password_hash("LK12345678"),
                 role="super_admin",
                 is_active=True,
             )
diff --git a/backend/scripts/init_admin.py b/backend/scripts/init_admin.py
index 316286b2..ada471ae 100644
--- a/backend/scripts/init_admin.py
+++ b/backend/scripts/init_admin.py
@@ -19,7 +19,7 @@ DEFAULT_LOGIN_USERS = (
     {
         "username": "linkong",
         "email": "linkong@planet.local",
-        "password": "12345678",
+        "password": "LK12345678",
         "role": "super_admin",
     },
 )
diff --git a/backend/scripts/init_db.py b/backend/scripts/init_db.py
index e101c3d3..d04c0c48 100644
--- a/backend/scripts/init_db.py
+++ b/backend/scripts/init_db.py
@@ -22,7 +22,7 @@ DEFAULT_LOGIN_USERS = (
     {
         "username": "linkong",
         "email": "linkong@planet.local",
-        "password": "12345678",
+        "password": "LK12345678",
         "role": "super_admin",
     },
 )
diff --git a/docs/plans/docs-audience-split-plan.md b/docs/plans/docs-audience-split-plan.md
index ddd23b83..9ca026f3 100644
--- a/docs/plans/docs-audience-split-plan.md
+++ b/docs/plans/docs-audience-split-plan.md
@@ -57,7 +57,7 @@
 
 抽自现 manual.md，重新组织：
 
-1. 首次启动 — `./planet.sh start`、默认账号（`admin/admin123`、`linkong/12345678`，引用 `b15d097b` 引入的 `DEFAULT_LOGIN_USERS`）
+1. 首次启动 — `./planet.sh start`、默认账号（`admin/admin123`、`linkong/LK12345678`，引用 `b15d097b` 引入的 `DEFAULT_LOGIN_USERS`）
 2. 启停与按模块重启 — `start/stop/restart` 及 `-b -f -a -d`
 3. 健康检查 — `./planet.sh health`
 4. 日志 — `./planet.sh log` 及 `-f -b -a`，日志文件路径
diff --git a/docs/technical/en/ops-runbook.md b/docs/technical/en/ops-runbook.md
index 5306ab0e..7fca18c1 100644
--- a/docs/technical/en/ops-runbook.md
+++ b/docs/technical/en/ops-runbook.md
@@ -21,7 +21,7 @@ First startup seeds two default accounts (see `DEFAULT_LOGIN_USERS` in `backend/
 | Username | Password | Role |
 | --- | --- | --- |
 | `admin` | `admin123` | `super_admin` |
-| `linkong` | `12345678` | `super_admin` |
+| `linkong` | `LK12345678` | `super_admin` |
 
 Both seed accounts are created with `email_verified = TRUE` and can log into the console immediately. Any other account must either go through the public registration flow described in the Manual, or be created via `./planet.sh createuser`.
 
diff --git a/docs/technical/zh/ops-runbook.md b/docs/technical/zh/ops-runbook.md
index d68044a6..b06b50ec 100644
--- a/docs/technical/zh/ops-runbook.md
+++ b/docs/technical/zh/ops-runbook.md
@@ -21,7 +21,7 @@
 | 用户名 | 密码 | 角色 |
 | --- | --- | --- |
 | `admin` | `admin123` | `super_admin` |
-| `linkong` | `12345678` | `super_admin` |
+| `linkong` | `LK12345678` | `super_admin` |
 
 两个默认账号 `email_verified` 为 `true`，可直接登录控制台。任何在该列表之外的账号都必须走公开注册 + 邮箱验证流程（见使用手册），或用 `./planet.sh createuser` 命令式创建。
 
diff --git a/planet.sh b/planet.sh
index 644f5d1b..35a1f665 100755
--- a/planet.sh
+++ b/planet.sh
@@ -535,6 +535,18 @@ run_command_with_spinner() {
     return "$exit_code"
 }
 
+run_command_quiet_unless_verbose() {
+    local log_file="$1"
+    shift
+
+    if [ "$VERBOSE" -eq 1 ]; then
+        "$@"
+        return $?
+    fi
+
+    "$@" > "$log_file" 2>&1
+}
+
 resolve_bun_from_shell_configs() {
     local shell_name="$1"
     shift
@@ -1272,6 +1284,8 @@ install_bun_if_needed() {
 }
 
 ensure_uv_backend_deps() {
+    local log_file="$PLANET_STATE_DIR/uv_sync.log"
+
     set_wait_detail "检查后端 uv 环境"
 
     if ! command -v uv >/dev/null 2>&1; then
@@ -1279,6 +1293,7 @@ ensure_uv_backend_deps() {
     fi
 
     cd "$SCRIPT_DIR"
+    : > "$log_file"
 
     if [ ! -x "$SCRIPT_DIR/.venv/bin/python" ]; then
         log_warn "未检测到 .venv，正在执行 uv sync"
@@ -1287,7 +1302,8 @@ ensure_uv_backend_deps() {
             "$DEPENDENCY_INSTALL_RETRY_INTERVAL" \
             "uv 环境初始化失败，已重试 ${DEPENDENCY_INSTALL_MAX_RETRIES} 次" \
             "uv sync" \
-            uv sync --group dev; then
+            run_command_quiet_unless_verbose "$log_file" uv sync --group dev; then
+            tail -20 "$log_file" 2>/dev/null || true
             exit 1
         fi
     fi
@@ -1299,6 +1315,8 @@ ensure_uv_backend_deps() {
 }
 
 ensure_python_runtime() {
+    local log_file="$PLANET_STATE_DIR/uv_python_install.log"
+
     ensure_local_runtime_bins_on_path
 
     if ! command -v uv >/dev/null 2>&1; then
@@ -1306,6 +1324,7 @@ ensure_python_runtime() {
     fi
 
     cd "$SCRIPT_DIR"
+    : > "$log_file"
 
     set_wait_detail "安装 Python 3.14 运行时"
     if ! run_with_retry \
@@ -1313,12 +1332,15 @@ ensure_python_runtime() {
         "$DEPENDENCY_INSTALL_RETRY_INTERVAL" \
         "Python 3.14 运行时安装失败，已重试 ${DEPENDENCY_INSTALL_MAX_RETRIES} 次" \
         "uv python install 3.14" \
-        uv python install 3.14; then
+        run_command_quiet_unless_verbose "$log_file" uv python install 3.14; then
+        tail -20 "$log_file" 2>/dev/null || true
         exit 1
     fi
 }
 
 sync_python_deps() {
+    local log_file="$PLANET_STATE_DIR/uv_sync.log"
+
     ensure_local_runtime_bins_on_path
 
     if ! command -v uv >/dev/null 2>&1; then
@@ -1326,6 +1348,7 @@ sync_python_deps() {
     fi
 
     cd "$SCRIPT_DIR"
+    : > "$log_file"
 
     set_wait_detail "同步 Python 依赖"
     if ! run_with_retry \
@@ -1333,7 +1356,8 @@ sync_python_deps() {
         "$DEPENDENCY_INSTALL_RETRY_INTERVAL" \
         "uv 环境初始化失败，已重试 ${DEPENDENCY_INSTALL_MAX_RETRIES} 次" \
         "uv sync" \
-        uv sync --group dev; then
+        run_command_quiet_unless_verbose "$log_file" uv sync --group dev; then
+        tail -20 "$log_file" 2>/dev/null || true
         exit 1
     fi
 
@@ -1469,6 +1493,7 @@ resolve_frontend_runtime() {
 
 ensure_frontend_deps() {
     local owns_wait_session=0
+    local log_file="$PLANET_STATE_DIR/bun_install.log"
 
     if [ "$WAIT_SESSION_ACTIVE" -eq 0 ]; then
         start_wait_session "检查前端依赖"
@@ -1488,6 +1513,7 @@ ensure_frontend_deps() {
     fi
 
     cd "$SCRIPT_DIR/frontend"
+    : > "$log_file"
 
     set_wait_detail "检查 Vite Bun 入口是否已安装"
     if [ ! -f "$FRONTEND_VITE_ENTRY" ]; then
@@ -1498,7 +1524,8 @@ ensure_frontend_deps() {
             "$DEPENDENCY_INSTALL_RETRY_INTERVAL" \
             "前端依赖安装失败，已重试 ${DEPENDENCY_INSTALL_MAX_RETRIES} 次" \
             "bun install" \
-            "$FRONTEND_RUNTIME_BIN" install; then
+            run_command_quiet_unless_verbose "$log_file" "$FRONTEND_RUNTIME_BIN" install; then
+            tail -20 "$log_file" 2>/dev/null || true
             exit 1
         fi
     fi
@@ -2917,6 +2944,8 @@ ensure_planet_env_files() {
 }
 
 sync_frontend_deps() {
+    local log_file="$PLANET_STATE_DIR/bun_install.log"
+
     set_wait_detail "解析前端运行时"
     if ! resolve_frontend_runtime; then
         install_bun_if_needed
@@ -2927,6 +2956,7 @@ sync_frontend_deps() {
     fi
 
     cd "$SCRIPT_DIR/frontend"
+    : > "$log_file"
 
     set_wait_detail "同步前端依赖"
     if ! run_with_retry \
@@ -2934,7 +2964,8 @@ sync_frontend_deps() {
         "$DEPENDENCY_INSTALL_RETRY_INTERVAL" \
         "前端依赖安装失败，已重试 ${DEPENDENCY_INSTALL_MAX_RETRIES} 次" \
         "bun install" \
-        "$FRONTEND_RUNTIME_BIN" install; then
+        run_command_quiet_unless_verbose "$log_file" "$FRONTEND_RUNTIME_BIN" install; then
+        tail -20 "$log_file" 2>/dev/null || true
         exit 1
     fi
 }
@@ -3041,7 +3072,7 @@ init() {
     log_success "初始化完成"
     log_note "默认本地登录用户:"
     log_note "  admin / admin123"
-    log_note "  linkong / 12345678"
+    log_note "  linkong / LK12345678"
     log_note "下一步: ./planet.sh start"
 }
 
diff --git a/scripts/init_db.py b/scripts/init_db.py
index 33fac9e7..ccb65822 100644
--- a/scripts/init_db.py
+++ b/scripts/init_db.py
@@ -23,7 +23,7 @@ DEFAULT_LOGIN_USERS = (
     {
         "username": "linkong",
         "email": "linkong@planet.local",
-        "password": "12345678",
+        "password": "LK12345678",
         "role": "super_admin",
     },
 )