feat(client): Windows 提供 Inno Setup 安装程序 + 下载改同源 HTTPS

- Windows 客户端打成 jiu-windows-x64-setup.exe（Inno Setup，中文向导、
  桌面/开始菜单快捷方式、卸载项），替代解压版 zip
- provision-windows.sh 自动静默安装 Inno Setup（缺则装）
- 下载 URL 从内网 HTTP Forgejo 改为 https://jiu.51yanmei.com/downloads/，
  修复 HTTPS 页面下发 http 内网地址被浏览器拦截（无法安全下载），win/mac 均生效
- deploy.sh 将安装包发布到 EC2 /opt/jiu/downloads/，nginx 新增 /downloads/ 路由

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

scripts/ci/compile-windows.sh

@@ -44,13 +44,31 @@ flutter build windows --release \
   "--dart-define=APP_VERSION=${TAG}"
 popd > /dev/null
 
-# Package the Release folder into dist/ using PowerShell Compress-Archive.
-# Source is an absolute Windows path; destination is relative to the workspace.
+# Package the Release folder into a Windows installer with Inno Setup (ISCC).
+# Inno Setup is installed by provision-windows.sh.
+ISCC="/c/Program Files (x86)/Inno Setup 6/ISCC.exe"
+if [ ! -f "$ISCC" ]; then
+  echo "ERROR: Inno Setup (ISCC) not found at '$ISCC'. Run provision-windows.sh first." >&2
+  exit 1
+fi
+
+# Run ISCC entirely under the clean build root: 32-bit ISCC would hit WOW64
+# redirection if it read the .iss / wrote output under the System32 workspace.
+cp deploy/windows/jiu-installer.iss "${BUILD_ROOT}/jiu-installer.iss"
+mkdir -p "${BUILD_ROOT}/dist"
+echo "==> building installer with Inno Setup (version ${VER})"
+"$ISCC" \
+  "/DAppVer=${VER}" \
+  "/DSrcDir=C:\\jiu-build\\client\\build\\windows\\x64\\runner\\Release" \
+  "/DOutDir=C:\\jiu-build\\dist" \
+  "C:\\jiu-build\\jiu-installer.iss"
+
+# Copy the installer back to the workspace dist/ via PowerShell (64-bit, so it
+# can write the System32 workspace path without WOW64 redirection).
 mkdir -p dist
-REL_WIN='C:\jiu-build\client\build\windows\x64\runner\Release'
-echo "==> packaging ${REL_WIN} -> dist/jiu-windows-x64.zip"
+echo "==> copying installer -> dist/jiu-windows-x64-setup.exe"
 powershell -NoProfile -Command \
-  "Compress-Archive -Path '${REL_WIN}\*' -DestinationPath 'dist\jiu-windows-x64.zip' -Force"
+  "Copy-Item 'C:\\jiu-build\\dist\\jiu-windows-x64-setup.exe' 'dist\\jiu-windows-x64-setup.exe' -Force"
 
 echo "==> compile-windows: done — dist/ contents:"
 ls -lh dist/

scripts/ci/deploy.sh

@@ -90,6 +90,11 @@ rsync -avz --delete -e "ssh -i ~/.ssh/ec2_deploy.pem -o StrictHostKeyChecking=no
 rsync -avz --delete -e "ssh -i ~/.ssh/ec2_deploy.pem -o StrictHostKeyChecking=no" \
   /tmp/jiu-marketing-new/ "${EC2_USER}@${EC2_HOST}:/tmp/jiu-marketing-new/"
 
+# Upload desktop client installers (served from /downloads/ by nginx).
+# Guarded: may be absent in a partial manual deploy.
+[ -f dist/jiu-windows-x64-setup.exe ] && ${SCP} dist/jiu-windows-x64-setup.exe "${EC2_USER}@${EC2_HOST}:/tmp/jiu-windows-x64-setup.exe" || true
+[ -f dist/jiu-macos-x64.zip ] && ${SCP} dist/jiu-macos-x64.zip "${EC2_USER}@${EC2_HOST}:/tmp/jiu-macos-x64.zip" || true
+
 echo "==> deploy: running remote deploy"
 
 ${SSH} "${EC2_USER}@${EC2_HOST}" << 'ENDSSH'
@@ -126,6 +131,11 @@ mkdir -p /opt/jiu/marketing
 rsync -a --delete /tmp/jiu-marketing-new/ /opt/jiu/marketing/
 rm -rf /tmp/jiu-marketing-new
 
+# Publish desktop client installers to the nginx-served downloads dir
+mkdir -p /opt/jiu/downloads
+[ -f /tmp/jiu-windows-x64-setup.exe ] && mv -f /tmp/jiu-windows-x64-setup.exe /opt/jiu/downloads/ || true
+[ -f /tmp/jiu-macos-x64.zip ] && mv -f /tmp/jiu-macos-x64.zip /opt/jiu/downloads/ || true
+
 # Update jiu nginx config in the pangolin-edge reverse proxy.
 # nginx now runs inside the `pangolin-edge` container (host networking), not on
 # the host. Its /etc/nginx/conf.d is bind-mounted from the host dir below, so we

scripts/ci/provision-windows.sh

@@ -2,8 +2,10 @@
 # provision-windows.sh — idempotent provisioning for the Windows host runner.
 #
 # Pre-warms what compile-windows.sh would download at runtime: Flutter Windows
-# engine artifacts and pub packages. Short-circuits via a stamp file keyed to
-# the installed Flutter version, so repeat runs return immediately.
+# engine artifacts, pub packages, and the Inno Setup compiler (ISCC) used to
+# build the installer. The Flutter part short-circuits via a stamp keyed to the
+# installed Flutter version; Inno Setup is ensured on every run (cheap when
+# already present) so it self-heals independently of the Flutter stamp.
 set -euo pipefail
 
 SCRIPT_DIR="$(dirname "$0")"
@@ -15,7 +17,24 @@ STAMP="${STAMP_DIR}/provisioned-windows"
 CUR="${STAMP_DIR}/.flutter-version-win.cur"
 mkdir -p "$STAMP_DIR"
 
-# --- detection ---
+# --- ensure Inno Setup (ISCC) for building the installer (always checked) ---
+ISCC="/c/Program Files (x86)/Inno Setup 6/ISCC.exe"
+if [ ! -f "$ISCC" ]; then
+  echo "==> installing Inno Setup 6 (silent)"
+  # Canonical "latest stable" entry point (redirects to the GitHub release asset).
+  INNO_URL="https://jrsoftware.org/download.php/is.exe"
+  powershell -NoProfile -Command \
+    "Invoke-WebRequest -Uri '${INNO_URL}' -OutFile \"\$env:TEMP\\innosetup.exe\""
+  powershell -NoProfile -Command \
+    "Start-Process -Wait -FilePath \"\$env:TEMP\\innosetup.exe\" -ArgumentList '/VERYSILENT','/SUPPRESSMSGBOXES','/NORESTART','/SP-'"
+  if [ ! -f "$ISCC" ]; then
+    echo "ERROR: Inno Setup install failed — ISCC not found at '$ISCC'." >&2
+    exit 1
+  fi
+  echo "==> Inno Setup installed."
+fi
+
+# --- detection (Flutter) ---
 if ! command -v flutter >/dev/null 2>&1; then
   echo "ERROR: flutter not found on PATH. Install Flutter on this runner first." >&2
   exit 1

scripts/ci/release.sh

@@ -44,9 +44,13 @@ notes = sys.argv[2]
 tag   = sys.argv[3]
 furl  = sys.argv[4].rstrip('/')
 repo  = sys.argv[5]
-base  = f"{furl}/{repo}/releases/download/{tag}"
+# Public download URLs are served by jiu.51yanmei.com (same-origin HTTPS via the
+# pangolin nginx /downloads/ location), NOT the LAN-only HTTP Forgejo instance —
+# otherwise the HTTPS download page hands the browser an http://192.168.x URL and
+# Chrome blocks it as insecure / it's unreachable from the public internet.
+base  = "https://jiu.51yanmei.com/downloads"
 mac_url = f"{base}/jiu-macos-x64.zip"
-win_url = f"{base}/jiu-windows-x64.zip"
+win_url = f"{base}/jiu-windows-x64-setup.exe"
 
 lines = []
 with open('backend/config/version.yaml') as f:
@@ -128,6 +132,6 @@ upload_asset dist/web.tar.gz
 upload_asset dist/marketing.tar.gz
 upload_asset dist/configs.tar.gz
 upload_asset dist/jiu-macos-x64.zip
-upload_asset dist/jiu-windows-x64.zip
+upload_asset dist/jiu-windows-x64-setup.exe
 
 echo "==> release: done — Release ${TAG} created"