feat(studio): clickable install pills + open-in-editor on flow cards (v0.43.0)

When a saved flow is missing modules, each capability pill in the
"Needs:" row is now clickable: tap one and a per-item progress
dialog walks the bare capability name through installModule, then
the flows page refreshes. When more than one capability is missing,
an extra "Install all (N)" button runs the same dialog over the
whole list sequentially so a fresh operator can take an unrunnable
flow and one click later have its dependencies resolved.

Also adds a pencil icon next to Run that hands the YAML path to
the OS via SystemActions.openInOs — the operator's default editor
for .yaml decides what opens. Makes the path next to the flow name
actionable instead of decorative.

The install dialog renders one row per spec with a status icon
(pending circle / spinner / check / error), shows the installed
version on success, and surfaces the full error in a copyable
FaiErrorBox on failure so the operator can paste it back.

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

lib/l10n/app_localizations_en.dart

@@ -1080,6 +1080,57 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get flowsRunDisabledTooltip => 'Install the missing modules first.';
 
+  @override
+  String flowsInstallAllButton(int n) {
+    return 'Install all ($n)';
+  }
+
+  @override
+  String get flowsInstallPillTooltip => 'Click to install';
+
+  @override
+  String get flowsInstallDepsTitle => 'Install dependencies';
+
+  @override
+  String get flowsInstallDepsBody =>
+      'Walking through the missing modules in order. Existing installs are left alone.';
+
+  @override
+  String get flowsInstallStatusPending => 'Pending';
+
+  @override
+  String get flowsInstallStatusInstalling => 'Installing…';
+
+  @override
+  String flowsInstallStatusDone(String version) {
+    return 'Installed v$version';
+  }
+
+  @override
+  String get flowsInstallStatusFailed => 'Failed';
+
+  @override
+  String flowsInstallStatusFailedDetail(String error) {
+    return '$error';
+  }
+
+  @override
+  String get flowsInstallDepsAllDone => 'All dependencies installed.';
+
+  @override
+  String flowsInstallDepsAnyFailed(int ok, int failed) {
+    return '$ok installed, $failed failed.';
+  }
+
+  @override
+  String get flowsOpenInEditorTooltip =>
+      'Open the YAML file in your default editor';
+
+  @override
+  String flowsOpenInEditorFailed(String error) {
+    return 'Could not open file: $error';
+  }
+
   @override
   String get welcomeChecklistAllSetTitle => 'You\'re set up.';