fix(shell): 去掉所有窗口级玻璃（白框/黑块根因）；feat: 多会话切换 + 文件桥（桌面壳 HTTP 网关 403 的解法）

白框根因：SetWindowCompositionAttribute(Win10 亚克力) / DwmExtendFrameIntoClientArea(客户区变玻璃) / WebView2 Transparent 背景三者在真机上都会让 8px 边环露白、WebView2 变黑。现在窗口永远由应用自绘深色，背景效果只作为页面侧半透明（不再碰 DWM 与窗口 alpha）。新增： - 会话切换：标题栏 ⇄ 按钮 + 列表（会话标题/轮/步/消息数，可'跟随最新'）；宿主侧 pinnedSessionId，被选中的会话不再被其它会话的事件抢走；snapshot 里带 sessions[] - 文件桥：桌面壳对未认证请求一律 403（实测 6 种请求形态），浮窗改走文件——宿主每秒写 snapshot.json，浮窗渲染；浮窗的 chat/watch/newSession 写 outbox.json，宿主轮询执行。端到端实测通过 - 编码修复：快照按显式 UTF-8 读（PS 5.1 Get-Content -Raw 会按 GBK 读坏中文 JSON）； outbox 写 UTF-8 无 BOM
2026-09-27 17:02:07 +08:00
parent 387f9a0012
commit 7d1417fa1c
3 changed files with 248 additions and 22 deletions
@@ -67,6 +67,9 @@ $alreadyRunning = $false
 try { $null = [System.Threading.Mutex]::OpenExisting($mutexName); $alreadyRunning = $true } catch { $alreadyRunning = $false }
 $commandFile = Join-Path $stateDir 'command.json'
 $aliveFile = Join-Path $stateDir 'alive.json'
+# 文件桥：插件每秒写 snapshot.json（桌面壳 HTTP 网关 403，浮窗只能走文件）
+$snapshotFile = Join-Path $DshHome 'float-window\snapshot.json'
+$outboxFile = Join-Path $DshHome 'float-window\outbox.json'
 if ($alreadyRunning) {
    if ($Action) {
        try {
@@ -127,6 +130,7 @@ namespace DshFloat
        [StructLayout(LayoutKind.Sequential)] struct WINCOMPDATA { public int Attrib; public IntPtr Data; public int Size; }

        [DllImport("dwmapi.dll")] static extern int DwmSetWindowAttribute(IntPtr h, int attr, ref int val, int size);
+        [DllImport("dwmapi.dll")] static extern int DwmGetWindowAttribute(IntPtr h, int attr, out int val, int size);
        [DllImport("dwmapi.dll")] static extern int DwmExtendFrameIntoClientArea(IntPtr h, ref MARGINS m);
        [DllImport("user32.dll")] static extern int SetWindowCompositionAttribute(IntPtr h, ref WINCOMPDATA d);

@@ -135,12 +139,17 @@ namespace DshFloat
            BackdropMode = mode;
            int type = mode == 1 ? 2 : (mode == 2 ? 3 : 0);   // DWMSBT_MAINWINDOW / TRANSIENTWINDOW / AUTO
            int hr = DwmSetWindowAttribute(Handle, 38, ref type, 4);   // DWMWA_SYSTEMBACKDROP_TYPE
+            int got = -1;
+            int hrGet = DwmGetWindowAttribute(Handle, 38, out got, 4);
+            bool effective = mode == 0 ? true : (hr == 0 && hrGet == 0 && got == type);
+            // 关键 1：**不再**把客户区扩展成"玻璃"（真机上会让 8px 边环与 WebView2 露出白底）
+            // 关键 2：**不要**再用 SetWindowCompositionAttribute 的 ACCENT_ENABLE_ACRYLICBLURBEHIND，
+            //         那是 Win10 时代的未文档化做法，Win11 上会把窗口变成纯黑（实测 PrintWindow 全黑）。
+            // 现在窗口始终由应用自己画深色，系统背景只当装饰，"霜化"观感交给页面自己的半透明。
            MARGINS m = new MARGINS();
-            if (mode != 0) { m.l = -1; m.r = -1; m.t = -1; m.b = -1; }
            DwmExtendFrameIntoClientArea(Handle, ref m);
-            SetAccent(mode == 3 ? 4 : 0, mode == 0 ? 0 : unchecked((int)0x99202028));
            Invalidate(true);
-            return "mode=" + mode + " hr=" + hr;
+            return "mode=" + mode + " hr=" + hr + " got=" + got + " effective=" + effective;
        }

        void SetAccent(int state, int color)
@@ -156,16 +165,15 @@ namespace DshFloat
            Marshal.FreeHGlobal(p);
        }

+        // 始终由应用自己画背景（深色）：玻璃模式下 DWM 若没生效也不会露出白底
        protected override void OnPaintBackground(PaintEventArgs e)
        {
-            if (BackdropMode == 0) base.OnPaintBackground(e);
+            base.OnPaintBackground(e);
        }

        protected override void WndProc(ref Message m)
        {
            const int WM_NCHITTEST = 0x84;
-            const int WM_ERASEBKGND = 0x14;
-            if (m.Msg == WM_ERASEBKGND && BackdropMode != 0) { m.Result = (IntPtr)1; return; }
            if (m.Msg == WM_NCHITTEST && AllowResize)
            {
                long lp = m.LParam.ToInt64();
@@ -275,20 +283,27 @@ function Apply-Exclude {

 function Apply-Backdrop([string]$Mode) {
    if (-not $Mode) { $Mode = 'opaque' }
+    # 真机结论：这台机器上任何"窗口级"的系统背景（DWM 系统背景类型 / Win10 亚克力 /
+    # 把客户区扩展成玻璃）都会让 WebView2 内容变黑、8px 边环露白底（用户原话"边框有白色的框"）。
+    # 所以窗口**永远**保持应用自己绘制的深色，"背景效果"只作为页面侧的半透明/霜化观感，
+    # 页面 alpha 由不透明度滑杆控制。
    $script:state.backdrop = $Mode
-    $code = switch ($Mode) { 'mica' { 1 } 'acrylic' { 2 } 'blur' { 3 } 'translucent' { 0 } default { 0 } }
-    try {
-        $info = $form.ApplyBackdrop($code)
-        Log "backdrop $Mode -> $info"
-    } catch { Log "backdrop ERROR: $($_.Exception.Message)" }
-    # 玻璃模式必须让 WebView2 背景透明，否则页面自己把桌面糊住了
    if ($wv.CoreWebView2) {
-        try {
-            $wv.DefaultBackgroundColor = if ($code -eq 0) { [System.Drawing.Color]::FromArgb(255, 15, 17, 21) } else { [System.Drawing.Color]::Transparent }
-        } catch { Log "bg color ERROR: $($_.Exception.Message)" }
+        try { $wv.DefaultBackgroundColor = [System.Drawing.Color]::FromArgb(255, 15, 17, 21) } catch { }
    }
-    # 半透明：整窗 alpha（WebView2 是子窗口，这条路径观感一般，作为兜底）
-    if ($Mode -eq 'translucent') { Apply-Opacity $script:state.opacity } else { Set-WindowAlpha 1.0 }
+    Set-WindowAlpha 1.0
+    Log "backdrop $Mode (page-level only)"
+    Push-State
+}
+
+# 页面 -> 宿主：写 outbox.json（UTF-8 无 BOM，宿主侧 JSON.parse 才吃得下）
+function Write-Outbox([hashtable]$Msg) {
+    try {
+        $Msg.at = (Get-Date).ToString('o')
+        $json = $Msg | ConvertTo-Json -Compress
+        [System.IO.File]::WriteAllText($outboxFile, $json, (New-Object System.Text.UTF8Encoding($false)))
+        Log "outbox $($Msg.cmd) ($($json.Length)B)"
+    } catch { Log "outbox write failed: $($_.Exception.Message)" }
 }

 function Set-WindowAlpha([double]$value) {
@@ -371,6 +386,9 @@ $onWebMessage = {
        'backdrop'   { Apply-Backdrop ([string]$m.value); Save-State; Push-State }
        'scale'      { $script:state.scale = [double]$m.value; $wv.ZoomFactor = [double]$m.value; Save-State; Push-State }
        'reload'     { $wv.Reload() }
+        'chat'       { Write-Outbox @{ cmd = 'chat'; text = [string]$m.text } }
+        'watch'      { Write-Outbox @{ cmd = 'watch'; sessionId = [string]$m.sessionId } }
+        'newSession' { Write-Outbox @{ cmd = 'session'; action = 'create' } }
        'openExternal' { if ($m.url -match '^https?://') { Start-Process $m.url } }
    }
 }
@@ -391,6 +409,7 @@ function Invoke-Cmd([string]$c) {

 $script:lastEndpointText = ''
 $script:lastCommandText = ''
+$script:lastSnapshotText = ''
 $timer = New-Object System.Windows.Forms.Timer
 $timer.Interval = 700
 $timer.Add_Tick({
@@ -401,6 +420,17 @@ $timer.Add_Tick({
                if ($t -ne $script:lastEndpointText) { $script:lastEndpointText = $t; Send-Endpoint }
            }
        } catch {}
+        # 文件桥：宿主每秒写 snapshot.json（桌面壳的 HTTP 网关会 403，浮窗只能走文件）
+        # 必须显式按 UTF-8 读：PS 5.1 的 Get-Content -Raw 会按 GBK 解码，中文摘要会破坏 JSON
+        try {
+            if (Test-Path $snapshotFile) {
+                $s = [System.IO.File]::ReadAllText($snapshotFile, [System.Text.Encoding]::UTF8)
+                if ($s -and $s -ne $script:lastSnapshotText) {
+                    $script:lastSnapshotText = $s
+                    Send-ToPage @{ type = 'snapshot'; data = ($s | ConvertFrom-Json) }
+                }
+            }
+        } catch { Log "snapshot error: $($_.Exception.Message)" }
        # 插件/命令行下发的动作
        try {
            if (Test-Path $commandFile) {
@@ -357,6 +357,64 @@
            display: block;
        }

+        /* ---------------- 会话切换器 ---------------- */
+        #sessList {
+            position: absolute;
+            left: 8px;
+            right: 8px;
+            top: 36px;
+            max-height: 60%;
+            overflow-y: auto;
+            background: #171b22;
+            border: 1px solid var(--line);
+            border-radius: 10px;
+            padding: 6px;
+            box-shadow: 0 12px 32px rgba(0, 0, 0, .5);
+            display: none;
+            z-index: 25;
+        }
+
+        #sessList.show {
+            display: block;
+        }
+
+        #sessList .srow {
+            display: flex;
+            align-items: center;
+            gap: 8px;
+            padding: 6px 8px;
+            border-radius: 7px;
+            cursor: pointer;
+            font-size: 12px;
+        }
+
+        #sessList .srow:hover {
+            background: var(--bg-chip);
+        }
+
+        #sessList .srow.act {
+            background: var(--accent-soft);
+        }
+
+        #sessList .srow .st {
+            flex: 1 1 auto;
+            overflow: hidden;
+            text-overflow: ellipsis;
+            white-space: nowrap;
+        }
+
+        #sessList .srow .sm {
+            flex: 0 0 auto;
+            color: var(--fg-dim);
+            font-size: 11px;
+        }
+
+        #sessList .head {
+            color: var(--fg-dim);
+            font-size: 11px;
+            padding: 2px 8px 6px;
+        }
+
        #settings h4 {
            margin: 0 0 8px;
            font-size: 12px;
@@ -482,6 +540,11 @@
        <div id="bar">
            <div class="dot wait" id="dot"></div>
            <div id="title"><span id="titleText">DSH 悬浮窗</span><small id="sub">未连接</small></div>
+            <button class="tbtn" id="bSess" title="切换要镜像的会话">
+                <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round">
+                    <path d="M4 8h13l-3-3M20 16H7l3 3" />
+                </svg>
+            </button>
            <button class="tbtn" id="bPin" title="固定位置">
                <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round">
                    <path d="M9 4h6l-1 6 3 3v1H7v-1l3-3-1-6z" />
@@ -554,6 +617,8 @@
            </div>
        </div>

+        <div id="sessList"></div>
+
        <div id="settings">
            <h4>悬浮窗设置</h4>
            <div class="srow"><span>背景效果</span>
@@ -620,6 +685,16 @@

        let es = null
        let ENDPOINT = null
+        /** 文件桥（桌面壳 HTTP 网关不可用时的通道）也叫"连上了" */
+        function markLive(label) {
+            $('dot').className = 'dot live'
+            if (label) $('sub').textContent = label
+            $('input').disabled = false
+            $('send').disabled = false
+            document.body.classList.add('linked')
+            const hint = $('hint')
+            if (hint) hint.style.display = 'none'
+        }
        function setEndpoint(ep) {
            const live = !!(ep && ep.baseUrl)
            ENDPOINT = live ? ep.baseUrl : null
@@ -652,6 +727,11 @@
        function handleCmd(c) {
            if (c === 'hide') document.body.style.visibility = 'hidden'
            if (c === 'show') document.body.style.visibility = 'visible'
+            if (c === 'backdropFallback') {   // 系统玻璃不可用，宿主已回退成不透明
+                S.backdrop = 'opaque'
+                paint()
+                toast('这台机器上系统毛玻璃不可用，已回退为不透明')
+            }
        }

        let settingsApplied = false
@@ -672,15 +752,48 @@
        function render(msg) {
            if (!msg) return
            if (msg.type === 'cmd') return handleCmd(msg.cmd)
+            if (msg.type === 'snapshot') {          // 文件桥来的快照
+                markLive('本地桥')
+                return render(msg.data)
+            }
            if (msg.settings && !settingsApplied) { settingsApplied = true; applyDshSettings(msg.settings) }
            if (msg.metrics) metrics(msg.metrics)
            if (msg.messages) messages(msg.messages)
+            if (Array.isArray(msg.sessions)) { SESSIONS = msg.sessions; PINNED = msg.pinned || null; if ($('sessList').classList.contains('show')) renderSessions() }
            if (msg.title) {
                const t = String(msg.title).slice(0, 42)
                $('titleText').textContent = 'DSH · ' + t
            }
        }

+        /* ---------------- 会话切换 ---------------- */
+        let SESSIONS = []
+        let PINNED = null
+        function renderSessions() {
+            const box = $('sessList')
+            box.innerHTML = ''
+            const head = document.createElement('div')
+            head.className = 'head'
+            head.textContent = SESSIONS.length ? `共 ${SESSIONS.length} 个会话 · 点一个跟随它` : '还没有会话'
+            box.appendChild(head)
+
+            const mk = (label, sub, active, sid) => {
+                const row = document.createElement('div')
+                row.className = 'srow' + (active ? ' act' : '')
+                const st = document.createElement('div'); st.className = 'st'; st.textContent = label
+                const sm = document.createElement('div'); sm.className = 'sm'; sm.textContent = sub
+                row.append(st, sm)
+                row.onclick = () => { send({ cmd: 'watch', sessionId: sid }); box.classList.remove('show'); toast(sid ? '已切换到：' + label : '已改为跟随最新') }
+                box.appendChild(row)
+            }
+            mk('跟随最新', '', !PINNED, '')
+            for (const s of SESSIONS) {
+                const label = s.title || (s.id || '').slice(0, 8) + '…'
+                const sub = `${s.turns || 0}轮/${s.steps || 0}步`
+                mk(label, sub, PINNED ? s.id === PINNED : !!s.active, s.id)
+            }
+        }
+
        function metrics(m) {
            $('m-turn').textContent = m.turns ?? '—'
            $('m-step').textContent = m.steps ?? '—'
@@ -723,6 +836,7 @@
        $('bFull').onclick = () => cmd('fullscreen')
        $('bClose').onclick = () => cmd('close')
        $('bSet').onclick = () => $('settings').classList.toggle('show')
+        $('bSess').onclick = () => { const el = $('sessList'); renderSessions(); el.classList.toggle('show') }
        $('sTop').onclick = () => cmd('topmost')
        $('sPin').onclick = () => cmd('posLock')
        $('sLock').onclick = () => cmd('sizeLock')