feat: link each changelog entry to its PR and commit (#11)

Like Immich's and RomM's release notes: every changelog entry now links to its pull request and its commit, in `CHANGELOG.md` and in the release notes on Gitea:

```
- Search with fzf's scoring and query syntax ([#11](…/pulls/11)) ([65dc2d7](…/commit/65dc2d7…))
```

- `cliff.toml`: the entry template adds the short commit hash as a link; a postprocessor turns the squash commit's `(#N)` into a link to the PR.
- The app shows release notes as text (`U`, and the status pane's changelog to come), so `Release.Notes()` turns Markdown links back into their text: `Search (#11) (65dc2d7)`.

Checked with `git cliff --unreleased` on main: every entry since v0.1.0 gets both links. Test for the link stripping.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Karl-Einar Bergstrøm <karl-einarb@outlook.com>
Reviewed-on: #11

internal/ui/app/help.go

@@ -36,7 +36,8 @@ type contextHelp struct {
 	k        keys.Map
 	focus    pane
 	commands bool // custom commands apply here
-	account  bool // the fourth pane describes an account (fields.go)
+	account  bool // the fourth pane shows Fields (fields.go)
+	of       pane // what the fourth pane describes
 }
 
 func (c contextHelp) ShortHelp() []key.Binding {
@@ -45,8 +46,15 @@ func (c contextHelp) ShortHelp() []key.Binding {
 	if k.Login.Enabled() {
 		b = append(b, k.Login)
 	}
-	if c.focus == paneDetail && c.account {
-		copyField := key.NewBinding(key.WithKeys(k.Copy.Keys()...), key.WithHelp(k.Copy.Help().Key, "copy"))
+	copyField := key.NewBinding(key.WithKeys(k.Copy.Keys()...), key.WithHelp(k.Copy.Help().Key, "copy"))
+	switch {
+	case c.focus == paneStatus:
+		details := key.NewBinding(key.WithKeys(k.Enter.Keys()...), key.WithHelp(k.Enter.Help().Key, "details"))
+		return append(b, details, k.Update, k.Help, k.Quit)
+	case c.focus == paneDetail && c.account && c.of == paneStatus:
+		open := key.NewBinding(key.WithKeys(k.Open.Keys()...), key.WithHelp(k.Open.Help().Key, "open link"))
+		return append(b, k.Up, k.Down, copyField, open, k.Edit, k.Filter, k.Help, k.Quit)
+	case c.focus == paneDetail && c.account:
 		return append(b, k.Up, k.Down, copyField, k.Filter, k.Help, k.Quit)
 	}
 	switch c.focus {
@@ -65,7 +73,7 @@ func (c contextHelp) ShortHelp() []key.Binding {
 
 func (c contextHelp) FullHelp() [][]key.Binding { return [][]key.Binding{c.ShortHelp()} }
 
-var paneNames = [paneCount]string{"Sources", "Vaults", "Secrets", "Detail"}
+var paneNames = [paneCount]string{"Sources", "Vaults", "Secrets", "Detail", "Status"}
 
 // showKeybindings opens the ? menu, like lazygit's: every binding with
 // what it does, the focused pane's first, filterable by key, description