feat: l for details; details for vaults, scopes and files; getting started; the age of cached lists (#17)

- `l` goes to the details of what is selected; `enter` still drills in
- vaults, scopes and files show their details (vault settings from the listing, no extra requests)
- with nothing to show, the right pane says how to get started
- a list from the cache says how old it is while it reloads
- what is expiring, in the status pane and `lazysecrets expiring`
- when access is refused, what to check, for Azure and Databricks
- no group list in an account's details, and no Microsoft Graph call for it

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

internal/ui/keys/keys.go

@@ -36,7 +36,7 @@ const (
 type Map struct {
 	// lists
 	Up, Down, Top, Bottom             key.Binding
-	NextPane, PrevPane                key.Binding
+	NextPane, PrevPane, Details       key.Binding
 	Pane0, Pane1, Pane2, Pane3, Pane4 key.Binding
 	NextTab, PrevTab                  key.Binding
 	Enter, Back, Filter               key.Binding
@@ -87,7 +87,8 @@ func (m *Map) Actions() []Action {
 		a(Lists, "top", &m.Top, "top", "move", "Jump to the top of the focused list."),
 		a(Lists, "bottom", &m.Bottom, "bottom", "move", "Jump to the bottom of the focused list."),
 		a(Lists, "nextPane", &m.NextPane, "next pane", "move", "Focus the next pane: Sources, Vaults, Secrets, detail."),
-		a(Lists, "prevPane", &m.PrevPane, "prev pane", "move", "Focus the previous pane."),
+		a(Lists, "prevPane", &m.PrevPane, "prev pane", "move", "Focus the previous pane; from the detail pane, the one it describes."),
+		a(Lists, "details", &m.Details, "details", "move", "Focus the detail pane on the right, on what's selected: a source, vault, file or secret."),
 		a(Lists, "pane1", &m.Pane1, "Sources pane", "move", "Focus the Sources pane."),
 		a(Lists, "pane2", &m.Pane2, "Vaults pane", "move", "Focus the Vaults (or Scopes) pane."),
 		a(Lists, "pane3", &m.Pane3, "Secrets pane", "move", "Focus the Secrets pane."),
@@ -178,7 +179,7 @@ func (m *Map) Actions() []Action {
 var defaults = map[string][]string{
 	"lists.up": {"k", "up", "ctrl+k", "ctrl+p"}, "lists.down": {"j", "down", "ctrl+j", "ctrl+n"},
 	"lists.top": {"g", "home"}, "lists.bottom": {"G", "end"},
-	"lists.nextPane": {"tab", "l", "right"}, "lists.prevPane": {"shift+tab", "h", "left"},
+	"lists.nextPane": {"tab"}, "lists.prevPane": {"shift+tab", "h", "left"}, "lists.details": {"l", "right"},
 	"lists.pane1": {"1"}, "lists.pane2": {"2"}, "lists.pane3": {"3"}, "lists.pane4": {"4"}, "lists.pane0": {"0"},
 	"lists.enter": {"enter"}, "lists.back": {"esc", "backspace"},
 	"lists.filter": {"/"}, "lists.prevTab": {"["}, "lists.nextTab": {"]"}, "lists.sourcesView": {"`"},