feat: copy a file's or folder's #/name@owner link from Files, Music, Photos and Search

"Copy link" puts the address group-link.js resolves on the clipboard, on the
hub's origin rather than the page's, so a link copied in the desktop
application is not app://meshbay. Files offers it for one row, from the
right-click menu or the toolbar with one row ticked (a phone's way in);
Music on one track's menu, whose dots a phone has; Photos on a right-clicked
tile and in the lightbox's bar. The video player and the file preview carry
a link button next to Download.

Applications get a `linkFor(entry | folderPath)` prop (MESHBAY_DESIGN.md
§9.2) and offer the action only when it names a link. The group page builds
it from the hub's row; Search from each result's own group and its path
before the merged views prefixed it, and names no link for a folder of the
merged tree, which a group name alone does not identify.

harness/copy_link_probe.py mounts the three applications in Chrome and reads
what reached the clipboard.

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

10 files changed, 30 insertions, 0 deletions

diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/de.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/de.js
index 8d14dca..6e42af9 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/de.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/de.js
@@ -212,6 +212,9 @@ export default {
   'group.download_offline': 'Keine Verbindung zum Node — der Download kann nicht starten. Die Verbindung wird automatisch wiederhergestellt; versuchen Sie es gleich erneut.',
   'group.link_unknown': "Dieser Link verweist auf eine Gruppe, in der Sie nicht Mitglied sind, oder die nicht mehr so heißt.",
   'group.link_path_unknown': "Unter {path} gibt es in dieser Gruppe nichts — die Datei wurde vielleicht verschoben, umbenannt oder gelöscht.",
+  'link.copy': "Link kopieren",
+  'link.copied': "Link kopiert",
+  'link.copy_failed': "Kopieren nicht möglich — der Link lautet {url}",
   'group.download_write_stalled': 'Die Datei wird nicht mehr auf die Festplatte geschrieben ({seconds} s ohne Fortschritt). Der Download wurde abgebrochen statt hängen gelassen; versuchen Sie es erneut.',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/en.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/en.js
index a6cd0b4..f94b438 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/en.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/en.js
@@ -212,6 +212,9 @@ export default {
   'group.download_offline': 'Not connected to the node — the download cannot start. It reconnects on its own; try again in a moment.',
   'group.link_unknown': "This link names a group you are not a member of, or one that no longer goes by that name.",
   'group.link_path_unknown': "Nothing at {path} in this group — the file may have been moved, renamed or deleted.",
+  'link.copy': "Copy link",
+  'link.copied': "Link copied",
+  'link.copy_failed': "Could not copy — the link is {url}",
   'group.download_write_stalled': 'The file stopped being written to disk ({seconds}s with no progress). The download was stopped rather than left hanging; try it again.',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/es.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/es.js
index e066081..6ff8be2 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/es.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/es.js
@@ -210,6 +210,9 @@ export default {
   'group.download_offline': 'Sin conexión con el nodo — la descarga no puede empezar. Se reconecta sola; inténtelo de nuevo en un momento.',
   'group.link_unknown': "Este enlace nombra un grupo del que no eres miembro, o que ya no se llama así.",
   'group.link_path_unknown': "No hay nada en {path} en este grupo: puede que el archivo se haya movido, renombrado o eliminado.",
+  'link.copy': "Copiar enlace",
+  'link.copied': "Enlace copiado",
+  'link.copy_failed': "No se pudo copiar: el enlace es {url}",
   'group.download_write_stalled': 'El archivo dejó de escribirse en el disco ({seconds} s sin avance). La descarga se detuvo en lugar de quedarse colgada; inténtelo de nuevo.',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/fr.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/fr.js
index 01ccfcd..9132bd2 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/fr.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/fr.js
@@ -211,6 +211,9 @@ export default {
   'group.download_offline': 'Pas de connexion au node — le téléchargement ne peut pas démarrer. La reconnexion est automatique, réessayez dans un instant.',
   'group.link_unknown': "Ce lien désigne un groupe dont vous n'êtes pas membre, ou qui ne porte plus ce nom.",
   'group.link_path_unknown': "Rien à l'emplacement {path} dans ce groupe — le fichier a peut-être été déplacé, renommé ou supprimé.",
+  'link.copy': "Copier le lien",
+  'link.copied': "Lien copié",
+  'link.copy_failed': "Copie impossible — le lien est {url}",
   'group.download_write_stalled': 'L\'écriture du fichier sur le disque s\'est arrêtée ({seconds} s sans progression). Le téléchargement a été interrompu plutôt que laissé en suspens ; réessayez.',
   'device.add_title': 'Ce navigateur n’est pas encore lié à ce nœud',
   'device.add_hint': 'Votre compte est connu ici, mais ce navigateur détient une autre clé. Approuvez-le depuis un appareil déjà lié — sans passer par l’opérateur.',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/it.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/it.js
index 71af9f8..f3ff714 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/it.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/it.js
@@ -211,6 +211,9 @@ export default {
   'group.download_offline': 'Nessuna connessione al nodo — il download non può iniziare. La riconnessione è automatica, riprovi tra poco.',
   'group.link_unknown': "Questo link indica un gruppo di cui non sei membro, o che non ha più questo nome.",
   'group.link_path_unknown': "Non c'è nulla in {path} in questo gruppo: il file potrebbe essere stato spostato, rinominato o eliminato.",
+  'link.copy': "Copia link",
+  'link.copied': "Link copiato",
+  'link.copy_failed': "Impossibile copiare — il link è {url}",
   'group.download_write_stalled': 'Il file ha smesso di essere scritto su disco ({seconds} s senza progressi). Il download è stato interrotto invece di restare bloccato; riprovi.',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/ja.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/ja.js
index 4b357c8..0690034 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/ja.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/ja.js
@@ -209,6 +209,9 @@ export default {
   'group.download_offline': 'ノードに接続していません — ダウンロードを開始できません。再接続は自動で行われます。少し待って再試行してください。',
   'group.link_unknown': "このリンクは、あなたがメンバーでないグループ、またはもうその名前ではないグループを指しています。",
   'group.link_path_unknown': "このグループの {path} には何もありません。ファイルが移動、名前変更、または削除された可能性があります。",
+  'link.copy': "リンクをコピー",
+  'link.copied': "リンクをコピーしました",
+  'link.copy_failed': "コピーできませんでした。リンク: {url}",
   'group.download_write_stalled': 'ファイルのディスクへの書き込みが止まりました（{seconds} 秒間進みません）。ぶら下がったままにせず中止しました。もう一度お試しください。',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/nl.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/nl.js
index 1f4b12c..ce6312c 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/nl.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/nl.js
@@ -212,6 +212,9 @@ export default {
   'group.download_offline': 'Geen verbinding met de node — de download kan niet starten. Er wordt automatisch opnieuw verbonden; probeer het zo weer.',
   'group.link_unknown': "Deze link verwijst naar een groep waarvan je geen lid bent, of die niet meer zo heet.",
   'group.link_path_unknown': "Er staat niets op {path} in deze groep — het bestand is misschien verplaatst, hernoemd of verwijderd.",
+  'link.copy': "Link kopiëren",
+  'link.copied': "Link gekopieerd",
+  'link.copy_failed': "Kopiëren mislukt — de link is {url}",
   'group.download_write_stalled': 'Het bestand wordt niet meer naar schijf geschreven ({seconds} s zonder voortgang). De download is gestopt in plaats van te blijven hangen; probeer het opnieuw.',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js
index 05a3006..2737532 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js
@@ -215,6 +215,9 @@ export default {
   'group.download_offline': 'Brak połączenia z węzłem — pobieranie nie może się rozpocząć. Połączenie wróci samo; proszę spróbować za chwilę.',
   'group.link_unknown': "Ten link wskazuje grupę, do której nie należysz, lub która nie nosi już tej nazwy.",
   'group.link_path_unknown': "W tej grupie nie ma niczego pod {path} — plik mógł zostać przeniesiony, zmieniony lub usunięty.",
+  'link.copy': "Kopiuj link",
+  'link.copied': "Link skopiowany",
+  'link.copy_failed': "Nie udało się skopiować — link to {url}",
   'group.download_write_stalled': 'Plik przestał być zapisywany na dysk ({seconds} s bez postępu). Pobieranie zostało przerwane, zamiast wisieć w nieskończoność; proszę spróbować ponownie.',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/pt-BR.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/pt-BR.js
index 824c69a..c7cdf01 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/pt-BR.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/pt-BR.js
@@ -212,6 +212,9 @@ export default {
   'group.download_offline': 'Sem conexão com o nó — o download não pode começar. Ele reconecta sozinho; tente de novo em instantes.',
   'group.link_unknown': "Este link aponta para um grupo do qual você não é membro, ou que não tem mais esse nome.",
   'group.link_path_unknown': "Não há nada em {path} neste grupo — o arquivo pode ter sido movido, renomeado ou excluído.",
+  'link.copy': "Copiar link",
+  'link.copied': "Link copiado",
+  'link.copy_failed': "Não foi possível copiar — o link é {url}",
   'group.download_write_stalled': 'O arquivo parou de ser gravado no disco ({seconds}s sem progresso). O download foi interrompido em vez de ficar travado; tente de novo.',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/zh-CN.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/zh-CN.js
index d0d3954..06f61ff 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/zh-CN.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/zh-CN.js
@@ -208,6 +208,9 @@ export default {
   'group.download_offline': '未连接到节点 — 无法开始下载。连接会自动恢复，请稍后重试。',
   'group.link_unknown': "此链接指向一个您不是其成员的群组，或该群组已不再使用此名称。",
   'group.link_path_unknown': "此群组中 {path} 处没有内容——文件可能已被移动、重命名或删除。",
+  'link.copy': "复制链接",
+  'link.copied': "链接已复制",
+  'link.copy_failed': "无法复制——链接为 {url}",
   'group.download_write_stalled': '文件停止写入磁盘（{seconds} 秒无进展）。已中止下载而不是让它一直卡住，请重试。',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',