fix(ui): open app deep links from chat after confirmation (#2932)

* fix(ui): open app deep links from chat after confirmation

DOMPurify's default URI policy stripped href from anchors with custom
application schemes (obsidian://, vscode://, ...), so every app link
rendered in chat was dead across web, desktop, VS Code, and mobile.

- Classify safe app-link schemes in lib/url.ts (browser-handled,
  scriptable, webview-internal, network, and self-deep-link schemes
  stay excluded) and let openExternalUrl accept them
- Keep app-link hrefs through the markdown sanitize hook
- Intercept app-link clicks in the markdown renderer and route them
  through a confirmation dialog (Trust and open / Open once, dismiss
  to cancel) mounted in the desktop/web app root and the mobile shell
- Persist per-device trusted schemes in a zustand store; trusted
  schemes open without asking again

* feat(settings): manage trusted app link schemes in General

Add an App links section to Settings > General listing the application
schemes trusted on this device with a delete action; removing a scheme
restores the confirmation dialog for it. Register the section in
settings search.

* fix(ui): enforce app link confirmation

* fix(ui): handle app links by runtime

* fix(vscode): keep app links unsupported

* fix(settings): clarify trusted app links

---------

Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>

packages/ui/src/lib/i18n/messages/de.settings.ts

@@ -416,6 +416,10 @@ export const settingsDict = {
   'settings.common.actions.cancel': 'Abbrechen',
   'settings.common.actions.create': 'Erstellen',
   'settings.common.actions.delete': 'Löschen',
+  'settings.openchamber.appLinks.title': 'Vertrauenswürdige App-Links',
+  'settings.openchamber.appLinks.info': 'Hier aufgeführte Links öffnen sich auf diesem Gerät ohne erneute Nachfrage. Bei anderen App-Links wird vor dem Öffnen immer nachgefragt.',
+  'settings.openchamber.appLinks.empty': 'Keine vertrauenswürdigen App-Links auf diesem Gerät. Wähle beim Öffnen eines Links „Vertrauen und öffnen“, um ihn hier hinzuzufügen.',
+  'settings.openchamber.appLinks.removeAria': 'Vertraute {scheme}-Links entfernen',
   'settings.common.actions.reset': 'Zurücksetzen',
   'settings.common.actions.rename': 'Umbenennen',
   'settings.common.actions.duplicate': 'Duplizieren',