Configurable recap templates (categories per meeting type, in Settings)

Takeaways categories are no longer hardcoded — they're editable templates. A
template = the always-on TLDR + an ordered list of sections, each with a title, a
type (attributed items / bulleted list / paragraph), and an instruction (the prompt
text for that category). The analyzer assembles the LLM prompt FROM the template
and parses generically, so adding/removing/renaming a category needs zero code and
the output always renders.

- RecapTemplate / TemplateSection / SectionKind + TopicGranularity; built-in
  defaults (Internal Meeting, 1:1, Company/Sales Call), all editable.
- Generic extras: RecapExtras{tldr, primarySpeakers, sections:[RenderedSection]} +
  RecapItem{text,who,when,note} replaces the fixed MeetingExtras. Analyzer builds
  per-section sec_N fields + parses by kind; renderer + remap are generic.
- Topic granularity (coarse/auto/fine) answers 'should chunking be configurable' —
  it scales the target topic count; raw window sizes stay as tuned defaults.
- AppSettings persists templates + defaultTemplateId (seeded once). Settings gets a
  default-template picker + 'Manage…' → TemplatesView (CRUD, edit sections/
  instructions, set default, **Preview prompt** for full transparency).
- Recap editor gains a template picker; Regenerate uses the chosen template. Auto
  recap uses the default template.

54/54 XCTest (template prompt build, generic parse/remap/render updated).

Ten31Transcripts/UI/EditorWindow.swift

@@ -30,3 +30,29 @@ final class EditorWindow {
         w.makeKeyAndOrderFront(nil)
     }
 }
+
+/// Hosts the recap-templates manager in its own resizable window.
+@MainActor
+final class TemplatesWindow {
+    static let shared = TemplatesWindow()
+    private var window: NSWindow?
+
+    func show(settings: AppSettings) {
+        if let window {
+            NSApp.activate(ignoringOtherApps: true)
+            window.makeKeyAndOrderFront(nil)
+            return
+        }
+        let w = NSWindow(
+            contentRect: NSRect(x: 0, y: 0, width: 760, height: 560),
+            styleMask: [.titled, .closable, .resizable, .miniaturizable],
+            backing: .buffered, defer: false)
+        w.title = "Recap Templates"
+        w.isReleasedWhenClosed = false
+        w.center()
+        w.contentViewController = NSHostingController(rootView: TemplatesView(settings: settings))
+        window = w
+        NSApp.activate(ignoringOtherApps: true)
+        w.makeKeyAndOrderFront(nil)
+    }
+}