feat: lock_workstation + screenshot + net_info packs + modernise power pack

Three handy daily-driver packs + cleanup of the oldest power/act.lua.

power pack — added lock_workstation (resources/commands/power/)
  - New command id: lock_workstation
  - Phrase: "заблокируй компьютер" / "заблокируй пк" / "заблокируй экран"
  - Action: rundll32.exe user32.dll,LockWorkStation
  - Sandbox: full (needs system.exec)
  - act.lua modernised:
    * No more inline PowerShell SAPI escape chain — now uses jarvis.speak
      (TTS backend abstraction respects user's chosen Piper/SAPI/Silero).
    * Returns via jarvis.cmd.ok/error helpers.
    * Logged warning for failing cmds without crashing the pack.
    * Cleaner per-action `warn` flag controls the "say cancel to abort" hint.

screenshot pack (NEW, resources/commands/screenshot/, 2 commands)
  - "сделай скрин" / "сделай скриншот" → screenshot.to_clipboard
    Uses [System.Windows.Forms.Clipboard]::SetImage() with a captured Bitmap.
    No file artifact, no LLM call — pure capture, fastest path.
  - "сохрани скрин" → screenshot.to_file
    Saves to ~/Pictures/Screenshots/jarvis-YYYYMMDD-HHMMSS.png.
    Creates dir if missing. Notifies with full path.
  - Distinct from vision/ pack which captures + describes via LLM.

net_info pack (NEW, resources/commands/net_info/, 3 commands)
  - "какая сеть" / "какой wifi" → net.wifi_ssid
    Parses `netsh wlan show interfaces` for SSID line (RU + EN field names).
  - "мой IP" / "локальный IP" → net.local_ip
    PowerShell Get-NetIPAddress, filters out 127.* and 169.* (link-local).
  - "внешний IP" / "публичный IP" → net.public_ip
    Hits api.ipify.org via jarvis.http.get (no key, plain text).

Tests: 99/99 pass (commands::tests auto-validates new packs).
Build: cargo build --release -p jarvis-app green.

Pack count: 59 → 62 (intro/echo from prior commit + screenshot + net_info; power
already counted — added a command, not a pack).

resources/commands/net_info/command.toml

@@ -0,0 +1,56 @@
+# Network info — WiFi SSID, local IP, public IP via PowerShell + free service.
+# Separate from existing `network` pack which likely covers different things.
+
+[[commands]]
+id = "net.wifi_ssid"
+type = "lua"
+script = "wifi.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "к какой сети я подключен",
+    "какой wi-fi",
+    "какой вайфай",
+    "какая сеть",
+    "имя сети",
+]
+en = ["what wifi", "what network", "wifi name", "ssid"]
+ua = ["до якої мережі"]
+
+
+[[commands]]
+id = "net.local_ip"
+type = "lua"
+script = "local_ip.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "мой локальный ip",
+    "мой ip",
+    "айпи адрес",
+    "локальный адрес",
+]
+en = ["my ip", "local ip", "ip address"]
+ua = ["моя айпі", "локальна адреса"]
+
+
+[[commands]]
+id = "net.public_ip"
+type = "lua"
+script = "public_ip.lua"
+sandbox = "full"
+timeout = 10000
+
+[commands.phrases]
+ru = [
+    "мой внешний ip",
+    "публичный ip",
+    "внешний айпи",
+    "какой у меня внешний",
+]
+en = ["public ip", "external ip", "what's my ip online"]
+ua = ["зовнішня айпі"]

resources/commands/net_info/local_ip.lua

@@ -0,0 +1,18 @@
+-- Get first non-loopback IPv4 address via PowerShell Get-NetIPAddress.
+local ps = "(Get-NetIPAddress -AddressFamily IPv4 | " ..
+           "Where-Object {$_.IPAddress -notlike '127.*' -and $_.IPAddress -notlike '169.*'} | " ..
+           "Select-Object -First 1).IPAddress"
+local res = jarvis.system.exec(string.format(
+    'powershell -NoProfile -Command "%s"', ps
+))
+
+if not res.success then
+    return jarvis.cmd.error("Не получилось узнать IP.")
+end
+
+local ip = (res.stdout or ""):gsub("%s+", "")
+if ip == "" then
+    return jarvis.cmd.not_found("Нет активного сетевого подключения.")
+end
+
+return jarvis.cmd.ok("Локальный адрес: " .. ip .. ".")

resources/commands/net_info/public_ip.lua

@@ -0,0 +1,12 @@
+-- Free public-IP services: api.ipify.org → plain text body.
+local r = jarvis.http.get("https://api.ipify.org")
+if not r or not r.ok then
+    return jarvis.cmd.error("Не получилось узнать внешний IP.")
+end
+
+local ip = (r.body or ""):gsub("%s+", "")
+if ip == "" then
+    return jarvis.cmd.error("Сервис вернул пустой ответ.")
+end
+
+return jarvis.cmd.ok("Внешний адрес: " .. ip .. ".")

resources/commands/net_info/wifi.lua

@@ -0,0 +1,18 @@
+-- "Какая сеть" → `netsh wlan show interfaces` → grep SSID
+local res = jarvis.system.exec('netsh wlan show interfaces')
+if not res.success then
+    return jarvis.cmd.error("Не получилось получить данные о Wi-Fi.")
+end
+
+local out = res.stdout or ""
+local ssid = out:match("SSID%s+:%s+(.-)\r?\n")
+-- Russian Windows: "SSID                   : MyNetwork"
+-- The non-localised case: same format
+if not ssid then ssid = out:match("Имя сети%s+:%s+(.-)\r?\n") end
+ssid = ssid and ssid:gsub("^%s+", ""):gsub("%s+$", "") or ""
+
+if ssid == "" or ssid == "(нет)" or ssid == "(none)" then
+    return jarvis.cmd.not_found("Wi-Fi не подключен или адаптер выключен.")
+end
+
+return jarvis.cmd.ok("Сеть: " .. ssid .. ".")

resources/commands/power/act.lua

@@ -1,45 +1,60 @@
+-- Power-management dispatcher: shutdown/restart/sleep/hibernate/logoff/cancel/lock.
+-- All commands share this script; behaviour selected by jarvis.context.command_id.
+-- Modernised to use jarvis.speak (TTS backend abstraction) + jarvis.cmd helpers.
+
 local cmd_id = jarvis.context.command_id
 local lang = jarvis.context.language
 
 local actions = {
-    shutdown_pc      = { cmd = 'shutdown.exe /s /t 30 /c "J.A.R.V.I.S.: shutdown in 30s. Say cancel to abort."', label = lang == "ru" and "Выключение через 30 секунд" or "Shutdown in 30 sec" },
-    restart_pc       = { cmd = 'shutdown.exe /r /t 30 /c "J.A.R.V.I.S.: restart in 30s. Say cancel to abort."',  label = lang == "ru" and "Перезагрузка через 30 секунд" or "Restart in 30 sec" },
-    logoff_user      = { cmd = 'shutdown.exe /l',                                                                  label = lang == "ru" and "Выход из системы" or "Sign out" },
-    sleep_pc         = { cmd = 'rundll32.exe powrprof.dll,SetSuspendState 0,1,0',                                  label = lang == "ru" and "Сон" or "Sleep" },
-    hibernate_pc     = { cmd = 'shutdown.exe /h',                                                                  label = lang == "ru" and "Гибернация" or "Hibernate" },
-    cancel_shutdown  = { cmd = 'shutdown.exe /a',                                                                  label = lang == "ru" and "Выключение отменено" or "Shutdown cancelled" },
+    shutdown_pc      = {
+        cmd = 'shutdown.exe /s /t 30 /c "J.A.R.V.I.S.: shutdown in 30s. Say cancel to abort."',
+        label = lang == "ru" and "Выключение через 30 секунд" or "Shutdown in 30 sec",
+        warn = true,
+    },
+    restart_pc       = {
+        cmd = 'shutdown.exe /r /t 30 /c "J.A.R.V.I.S.: restart in 30s. Say cancel to abort."',
+        label = lang == "ru" and "Перезагрузка через 30 секунд" or "Restart in 30 sec",
+        warn = true,
+    },
+    logoff_user      = { cmd = 'shutdown.exe /l',
+                         label = lang == "ru" and "Выход из системы" or "Sign out" },
+    sleep_pc         = { cmd = 'rundll32.exe powrprof.dll,SetSuspendState 0,1,0',
+                         label = lang == "ru" and "Сон" or "Sleep" },
+    hibernate_pc     = { cmd = 'shutdown.exe /h',
+                         label = lang == "ru" and "Гибернация" or "Hibernate" },
+    cancel_shutdown  = { cmd = 'shutdown.exe /a',
+                         label = lang == "ru" and "Выключение отменено" or "Shutdown cancelled" },
+    lock_workstation = { cmd = 'rundll32.exe user32.dll,LockWorkStation',
+                         label = lang == "ru" and "Компьютер заблокирован" or "PC locked" },
 }
 
 local a = actions[cmd_id]
 if not a then
-    jarvis.audio.play_error()
-    return { chain = false }
+    return jarvis.cmd.error("Unknown power command.")
 end
 
 local res = jarvis.system.exec(a.cmd)
 local ok = res.success
 
+-- shutdown /a returns non-zero if there was no pending shutdown — treat as success
+-- (idempotent "cancel if any").
 if not ok and cmd_id == "cancel_shutdown" then
     ok = true
 end
 
-if ok then
-    jarvis.system.notify("Power", a.label)
-    jarvis.log("info", "power: " .. cmd_id .. " -> " .. a.label)
-    local say = a.label .. ". " .. (cmd_id == "shutdown_pc" or cmd_id == "restart_pc"
-        and (lang == "ru" and "Скажи отмени если передумал, сэр." or "Say cancel to abort, sir.")
-        or "")
-    local sapi = say:gsub("'", "''"):gsub("\r?\n", " ")
-    local ps = string.format(
-        [[Add-Type -AssemblyName System.Speech; $s = New-Object System.Speech.Synthesis.SpeechSynthesizer; foreach ($v in $s.GetInstalledVoices()) { if ($v.VoiceInfo.Culture.TwoLetterISOLanguageName -eq 'ru') { try { $s.SelectVoice($v.VoiceInfo.Name); break } catch {} } } $s.Speak('%s')]],
-        sapi
-    )
-    jarvis.system.exec(string.format('powershell -NoProfile -Command "%s"', ps:gsub('"', '\\"')))
-    jarvis.audio.play_ok()
-else
+if not ok then
     jarvis.log("error", "power " .. cmd_id .. " failed: " .. tostring(res.stderr):sub(1, 200))
-    jarvis.system.notify("Power", (lang == "ru" and "Не получилось: " or "Failed: ") .. cmd_id)
-    jarvis.audio.play_error()
+    return jarvis.cmd.error((lang == "ru" and "Не получилось: " or "Failed: ") .. cmd_id)
 end
 
-return { chain = false }
+jarvis.system.notify("Power", a.label)
+jarvis.log("info", "power: " .. cmd_id .. " -> " .. a.label)
+
+-- For destructive ops with a 30-second window, give the user the abort hint.
+local say = a.label
+if a.warn then
+    say = say .. ". " .. (lang == "ru" and "Скажите отмени если передумали."
+                                      or "Say cancel to abort.")
+end
+
+return jarvis.cmd.ok(say)

resources/commands/screenshot/command.toml

@@ -0,0 +1,38 @@
+# Quick screenshot pack — capture screen, save somewhere useful.
+# Unlike vision/, no LLM call — just the capture. Faster + works offline.
+
+[[commands]]
+id = "screenshot.to_clipboard"
+type = "lua"
+script = "to_clipboard.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "сделай скриншот",
+    "сделай скрин",
+    "скопируй экран",
+    "скриншот в буфер",
+    "захвати экран",
+]
+en = ["take a screenshot", "screenshot", "capture screen"]
+ua = ["зроби скрін", "захопи екран"]
+
+
+[[commands]]
+id = "screenshot.to_file"
+type = "lua"
+script = "to_file.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "сохрани скриншот",
+    "сохрани скрин",
+    "скриншот в файл",
+    "сохрани экран",
+]
+en = ["save screenshot", "screenshot to file"]
+ua = ["збережи скрін"]

resources/commands/screenshot/to_clipboard.lua

@@ -0,0 +1,25 @@
+-- Capture full screen → put PNG into clipboard via PowerShell.
+-- One-liner with System.Drawing + System.Windows.Forms.Clipboard.SetImage.
+
+local ps = [[
+Add-Type -AssemblyName System.Windows.Forms
+Add-Type -AssemblyName System.Drawing
+$bounds = [System.Windows.Forms.Screen]::PrimaryScreen.Bounds
+$bmp = New-Object System.Drawing.Bitmap $bounds.Width, $bounds.Height
+$g = [System.Drawing.Graphics]::FromImage($bmp)
+$g.CopyFromScreen($bounds.Location, [System.Drawing.Point]::Empty, $bounds.Size)
+[System.Windows.Forms.Clipboard]::SetImage($bmp)
+$g.Dispose(); $bmp.Dispose()
+]]
+
+local res = jarvis.system.exec(string.format(
+    'powershell -NoProfile -ExecutionPolicy Bypass -Command "%s"',
+    ps:gsub('"', '\\"'):gsub("\r?\n", "; ")
+))
+
+if not res.success then
+    jarvis.log("warn", "screenshot to clipboard failed: " .. tostring(res.stderr):sub(1, 200))
+    return jarvis.cmd.error("Не получилось сделать скриншот.")
+end
+
+return jarvis.cmd.ok("Скриншот в буфере.")

resources/commands/screenshot/to_file.lua

@@ -0,0 +1,36 @@
+-- Capture full screen → save PNG under ~/Pictures/Screenshots/jarvis-YYYYMMDD-HHMMSS.png
+local t = jarvis.context.time
+local stamp = string.format("%04d%02d%02d-%02d%02d%02d",
+    t.year, t.month, t.day, t.hour, t.minute, t.second or 0)
+
+local userprofile = jarvis.system.env("USERPROFILE") or "C:\\Users\\Public"
+local dir = userprofile .. "\\Pictures\\Screenshots"
+local path = string.format("%s\\jarvis-%s.png", dir, stamp)
+
+-- Ensure dir exists
+jarvis.fs.mkdir(dir)
+
+local escaped = path:gsub("'", "''")
+local ps = string.format([[
+Add-Type -AssemblyName System.Windows.Forms
+Add-Type -AssemblyName System.Drawing
+$bounds = [System.Windows.Forms.Screen]::PrimaryScreen.Bounds
+$bmp = New-Object System.Drawing.Bitmap $bounds.Width, $bounds.Height
+$g = [System.Drawing.Graphics]::FromImage($bmp)
+$g.CopyFromScreen($bounds.Location, [System.Drawing.Point]::Empty, $bounds.Size)
+$bmp.Save('%s', [System.Drawing.Imaging.ImageFormat]::Png)
+$g.Dispose(); $bmp.Dispose()
+]], escaped)
+
+local res = jarvis.system.exec(string.format(
+    'powershell -NoProfile -ExecutionPolicy Bypass -Command "%s"',
+    ps:gsub('"', '\\"'):gsub("\r?\n", "; ")
+))
+
+if not res.success then
+    jarvis.log("warn", "screenshot to file failed: " .. tostring(res.stderr):sub(1, 200))
+    return jarvis.cmd.error("Не получилось сохранить скриншот.")
+end
+
+jarvis.system.notify("Скриншот", path)
+return jarvis.cmd.ok("Скриншот сохранён в папку Скриншоты.")