Add "power" page

Signed-off-by: Hadi <[email protected]>

internal/ui/power/model.go

@@ -0,0 +1,61 @@
+// Package power provides the "Power" TUI page: power-profile selection (via
+// powerprofilesctl) and battery/AC status, in the same spirit as the
+// bluetooth page's controller power + device state.
+package power
+
+import (
+	"charm.land/bubbles/v2/help"
+	tea "charm.land/bubbletea/v2"
+	ilovetui "github.com/anotherhadi/ilovetui"
+	"github.com/anotherhadi/settuings/internal/power"
+)
+
+type Model struct {
+	width  int
+	height int
+	help   help.Model
+
+	checkErr error // reason powerprofilesctl is unusable; nil once confirmed OK
+	checked  bool
+
+	profilesLoading bool
+	profilesErr     error
+	profiles        []power.Profile
+	cursor          int
+	pending         bool
+	feedback        string
+
+	batteryLoading bool
+	batteryErr     error
+	batteries      []power.Battery
+	ac             power.ACStatus
+}
+
+func New() Model {
+	return Model{
+		help:            ilovetui.NewHelp(),
+		profilesLoading: true,
+		batteryLoading:  true,
+	}
+}
+
+func (m Model) Init() tea.Cmd {
+	return nil
+}
+
+// Activate is called every time the user navigates onto this page. It
+// re-checks powerprofilesctl availability, fetches profiles + battery
+// state, and starts the periodic auto-refresh loop.
+func (m *Model) Activate() tea.Cmd {
+	return tea.Batch(checkCmd(), fetchProfilesCmd(), fetchBatteryCmd(), tickCmd())
+}
+
+func (m Model) IsEditing() bool {
+	return false
+}
+
+func (m *Model) SetSize(w, h int) {
+	m.width = w
+	m.height = h
+	m.help.SetWidth(w - 2)
+}