Add nightwatch75/todo 0.0.7 — prioritised to-do list (bar widget + panel) (#18)

* Add nightwatch75/todo 0.0.6

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* To Do 0.0.7: make priority sort a view; never rewrite the manual order

Review fix: switching to priority mode used to sort the items array and
persist it, destroying the manual ordering. items and the on-disk tasks
array now always hold the manual order; priority mode stable-sorts a
copy at render time only.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Massimiliano <m.angei@iotron.it>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

todo/todo.luau

@@ -0,0 +1,73 @@
+--!nonstrict
+-- To Do — bar widget that toggles the task panel.
+--
+-- The glyph is configurable (widget setting). It lights up while the panel is
+-- open (shared "todo_open" state, published by panel.luau) and its tooltip
+-- shows how many tasks are still to do. The count is read straight from
+-- todo.json, so it is correct before the panel is ever opened and reflects
+-- edits made to the file outside noctalia.
+
+local PANEL_ID = "nightwatch75/todo:panel"
+local FILE_NAME = "todo.json"
+
+local open = false
+local pending = 0
+
+local function todoFile()
+    local dir = noctalia.getConfig("todo_folder")
+    if dir == nil or dir == "" then
+        dir = noctalia.expandPath("~/Documents/Todo")
+    else
+        dir = noctalia.expandPath(dir)
+    end
+    return (dir:gsub("/+$", "")) .. "/" .. FILE_NAME
+end
+
+local function pendingCount()
+    local raw = noctalia.readFile(todoFile())
+    if raw == nil or raw == "" then
+        return 0
+    end
+    local decoded = noctalia.json.decode(raw)
+    if type(decoded) ~= "table" then
+        return 0
+    end
+    -- Object form { version, sort, tasks }; a legacy plain array is read as-is.
+    local list = decoded.tasks ~= nil and decoded.tasks or decoded
+    if type(list) ~= "table" then
+        return 0
+    end
+    local n = 0
+    for _, entry in ipairs(list) do
+        if type(entry) == "table" and entry.done ~= true then
+            n += 1
+        end
+    end
+    return n
+end
+
+local function render()
+    barWidget.setGlyph(noctalia.getConfig("glyph"))
+    barWidget.setGlyphColor(open and "primary" or "on_surface")
+    barWidget.setTooltip(noctalia.tr("tooltip", { count = pending }))
+end
+
+noctalia.state.watch("todo_open", function(value)
+    open = value == true
+    render()
+end)
+
+-- Periodic re-read keeps the pending count and glyph in sync with edits and
+-- setting changes.
+function update()
+    pending = pendingCount()
+    render()
+end
+
+function onClick()
+    noctalia.togglePanel(PANEL_ID)
+end
+
+noctalia.setUpdateInterval(2000)
+pending = pendingCount()
+render()