feat(commands): tier-1 PC tools — window mgmt, clipboard, notes, process killer, web search

Five new portable Lua command packs. Bumps the total from 11 to 16 packs.
All sandbox=full, all dispatched via jarvis.system.exec or jarvis.fs / jarvis.system
APIs, no new Rust code, post_build.py --sync copies them under target/.
cargo test -p jarvis-core --lib commands::tests passes 3/3 against all 16.

window/ — 8 commands, single dispatch.lua keyed by jarvis.context.command_id:
  show_desktop / maximize_window / minimize_window / snap_left / snap_right
  / close_window / restore_all / task_view. _window_helper.ps1 P/Invokes
  user32!keybd_event for arbitrary combos like "win+d", "alt+f4",
  "win+shift+m". Uses one shared script per pack — much less duplication
  than the volume/ approach.

clipboard_read/ — read_clipboard. Pulls jarvis.system.clipboard.get(),
caps preview at 400 chars, then shells PowerShell System.Speech to actually
speak it aloud (auto-picks the first ru-RU voice if present). Also fires a
notify with a 120-char snippet.

notes/ — add_note + open_notes. add_note strips the trigger phrase from
the recognized voice, appends "[YYYY-MM-DD HH:MM] body\n" to
%USERPROFILE%\Documents\jarvis-notes.txt via jarvis.fs.append (creates
the file on first call). open_notes opens the file in the default editor
via jarvis.system.open. Trigger list covers RU/EN/UA variants of
"запиши" / "запомни" / "write down" / etc.

process_kill/ — kill_process. Trigger-strips "закрой программу" / "убей
процесс" / etc., then runs the remainder through an alias map (хром→
chrome, телега→telegram, спотифай→spotify, edge/edge/едж→msedge etc.,
20+ entries) before invoking taskkill /F /IM. Notifies success/not-found.

websearch/ — search_google / search_youtube / search_wiki / search_yandex.
Single dispatch.lua reads jarvis.context.command_id to pick the base URL,
URL-encodes the query (Lua %02X gsub, not relying on jarvis.http), opens
the resulting link via jarvis.system.open (system default browser).

Portability check: every helper resolves paths via $env:USERPROFILE /
jarvis.context.command_path / jarvis.system.env — no hardcoded C:\ refs.

resources/commands/websearch/dispatch.lua

@@ -0,0 +1,61 @@
+local lang = jarvis.context.language
+local phrase = (jarvis.context.phrase or ""):lower()
+local cmd_id = jarvis.context.command_id
+
+local services = {
+    search_google  = { base = "https://www.google.com/search?q=",            label = "Google" },
+    search_youtube = { base = "https://www.youtube.com/results?search_query=", label = "YouTube" },
+    search_wiki    = { base = "https://ru.wikipedia.org/wiki/Special:Search?search=", label = "Wikipedia" },
+    search_yandex  = { base = "https://yandex.ru/search/?text=",             label = "Yandex" },
+}
+
+local svc = services[cmd_id]
+if not svc then
+    jarvis.log("error", "websearch: unknown command_id " .. tostring(cmd_id))
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+
+local triggers = {
+    "загугли", "поиск в гугл", "поищи в гугл", "найди в гугл", "ищи в гугл",
+    "найди на ютубе", "поиск на ютубе", "ищи на ютубе", "ютуб поиск",
+    "найди в википедии", "поиск в википедии", "википедия", "вики поиск",
+    "поищи в яндекс", "найди в яндекс", "яндекс поиск", "пробей в яндекс",
+    "search google", "google for", "google",
+    "youtube search", "search youtube", "find on youtube",
+    "wikipedia search", "search wikipedia", "look up wikipedia",
+    "yandex search", "search yandex",
+    "загугли", "пошукай в гугл",
+    "знайди на ютубі", "пошук на ютубі",
+    "знайди в вікіпедії", "пошук у вікіпедії",
+    "знайди в яндекс",
+}
+
+local q = phrase
+for _, t in ipairs(triggers) do
+    local s, e = string.find(q, t, 1, true)
+    if s == 1 then
+        q = q:sub(e + 1)
+        break
+    end
+end
+q = q:gsub("^%s+", ""):gsub("%s+$", "")
+
+if q == "" then
+    jarvis.system.notify(svc.label, lang == "ru" and "Что искать?" or "What to search?")
+    jarvis.audio.play_error()
+    return { chain = false }
+end
+
+local function url_encode(s)
+    return (s:gsub("([^%w%-_%.~])", function(c)
+        return string.format("%%%02X", string.byte(c))
+    end))
+end
+
+local url = svc.base .. url_encode(q)
+jarvis.log("info", "websearch " .. svc.label .. ": " .. q)
+jarvis.system.open(url)
+jarvis.system.notify(svc.label, q)
+jarvis.audio.play_ok()
+return { chain = false }