Add interactive release search (M6)

Release listing and grab in the shared arr client, a full-screen release
list (sort, hide rejected, rejection reasons, confirmation before grabbing
rejected releases; Usenet only), and a season/episode picker for Sonarr.
Overlays are now a stack so dialogs can open above the release list.
Add a fake Newznab indexer to the dev setup.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

internal/ui/app.go

@@ -3,6 +3,7 @@ package ui
 
 import (
 	"fmt"
+	"strings"
 	"time"
 
 	"github.com/gdamore/tcell/v2"
@@ -14,8 +15,6 @@ import (
 	"git.stinnesbeck.com/nils/arr-tui/internal/sonarr"
 )
 
-const modalPage = "modal"
-
 type view struct {
 	key  rune
 	name string
@@ -33,9 +32,14 @@ type App struct {
 	views  []view
 	active int
 
-	message    string
-	modalOpen  bool
-	modalFocus tview.Primitive
+	message  string
+	overlays []overlay // dialogs and full-screen views stacked above the pages
+}
+
+// overlay is a page stacked above the main views; focus is restored on close.
+type overlay struct {
+	page  string
+	focus tview.Primitive
 }
 
 // New builds the application shell: a tab bar, one page per view and a status bar.
@@ -96,6 +100,9 @@ func (a *App) Run() error {
 
 func (a *App) renderStatus() {
 	hints := "[gray]q quit · Tab/1-4/F1-F4 views · / search"
+	if len(a.overlays) > 0 {
+		hints = "[gray]Esc back · Ctrl+C quit"
+	}
 	if a.message == "" {
 		a.status.SetText(hints)
 		return
@@ -103,10 +110,17 @@ func (a *App) renderStatus() {
 	a.status.SetText(a.message + " [gray]│ " + hints)
 }
 
-// openModal shows p centered over the current view and remembers the focus.
+// pushOverlay stacks p above everything and focuses focus.
+func (a *App) pushOverlay(p, focus tview.Primitive) {
+	name := fmt.Sprintf("overlay-%d", len(a.overlays))
+	a.overlays = append(a.overlays, overlay{page: name, focus: a.app.GetFocus()})
+	a.pages.AddPage(name, p, true, true)
+	a.app.SetFocus(focus)
+	a.renderStatus()
+}
+
+// openModal shows p centered above the current view.
 func (a *App) openModal(p tview.Primitive, width, height int) {
-	a.modalFocus = a.app.GetFocus()
-	a.modalOpen = true
 	box := tview.NewFlex().
 		AddItem(nil, 0, 1, false).
 		AddItem(tview.NewFlex().SetDirection(tview.FlexRow).
@@ -114,21 +128,31 @@ func (a *App) openModal(p tview.Primitive, width, height int) {
 			AddItem(p, height, 0, true).
 			AddItem(nil, 0, 1, false), width, 0, true).
 		AddItem(nil, 0, 1, false)
-	a.pages.AddPage(modalPage, box, true, true)
-	a.app.SetFocus(p)
+	a.pushOverlay(box, p)
 }
 
+// openFull shows p above the whole view area (the tab bar and status bar stay visible).
+func (a *App) openFull(p tview.Primitive) {
+	a.pushOverlay(p, p)
+}
+
+// closeModal removes the topmost overlay and restores the previous focus.
 func (a *App) closeModal() {
-	a.pages.RemovePage(modalPage)
-	a.modalOpen = false
-	if a.modalFocus != nil {
-		a.app.SetFocus(a.modalFocus)
-		a.modalFocus = nil
+	if len(a.overlays) == 0 {
+		return
 	}
+	top := a.overlays[len(a.overlays)-1]
+	a.overlays = a.overlays[:len(a.overlays)-1]
+	a.pages.RemovePage(top.page)
+	if top.focus != nil {
+		a.app.SetFocus(top.focus)
+	}
+	a.renderStatus()
 }
 
 // confirm asks a yes/no question; yes runs only if the user picks Delete/Yes.
 func (a *App) confirm(text string, yes func()) {
+	lines := strings.Count(text, "\n") + 1 + len([]rune(text))/44
 	m := tview.NewModal().
 		SetText(text).
 		AddButtons([]string{"Cancel", "Confirm"}). // Cancel first so a stray Enter is safe
@@ -138,13 +162,13 @@ func (a *App) confirm(text string, yes func()) {
 				yes()
 			}
 		})
-	a.openModal(m, 60, 9)
+	a.openModal(m, 60, 7+min(lines, 10))
 }
 
 // typing reports whether keystrokes belong to a text field or dialog and must
 // not trigger global shortcuts.
 func (a *App) typing() bool {
-	if a.modalOpen {
+	if len(a.overlays) > 0 {
 		return true
 	}
 	_, isInput := a.app.GetFocus().(*tview.InputField)
@@ -157,7 +181,7 @@ func (a *App) handleKey(ev *tcell.EventKey) *tcell.EventKey {
 		return nil
 	}
 	// View switching that also works while typing in a search box. Not while a dialog is open.
-	if !a.modalOpen {
+	if len(a.overlays) == 0 {
 		if i := a.viewShortcut(ev); i >= 0 && i < len(a.views) {
 			a.switchTo(i)
 			return nil