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>

docs/keys.md

@@ -13,7 +13,8 @@ The rule: a letter in the lists, ctrl+ that letter where you type a filter
 |---|---|
 | `j`/`k`, `↑`/`↓` | move |
 | `g`/`G` | top / bottom |
-| `tab`/`l`, `shift+tab`/`h` | next / previous pane |
+| `tab`, `shift+tab`/`h` | next / previous pane |
+| `l` | the details of what's selected, on the right (`h` goes back) |
 | `1`–`4` | jump to pane |
 | `enter` / `esc`, `⌫` | drill in / back (also clears a filter or leaves the versions view) |
 | `[` / `]` | previous / next tab of the focused pane: Sources and Favourites in Sources; Secrets, Keys, Certs in Secrets |
@@ -107,9 +108,8 @@ anything loads.
 
 The pane on the right describes what's selected in the pane you're in: the
 account or subscription in Sources, the vault in Vaults, the secret in
-Secrets. Going into it (`4`, or `tab` from an account's row) keeps it on
-that; there `j`/`k`, `/` and `y` work on its rows, and `shift+tab` goes
-back. A value you reveal stays in view whichever pane you're in, until
+Secrets. Going into it (`l`, or `4`) keeps it on that; there `j`/`k`,
+`/` and `y` work on its rows, and `h` goes back. A value you reveal stays in view whichever pane you're in, until
 it's hidden.
 
 On top, the status pane (`0`) shows the version, a newer release and how