add shared pane widgets + Q-023 ssh-remote question

ClidePtyView is a theme-bound wrapper around xterm.dart's TerminalView
— token-derived TerminalTheme, JetBrainsMono as the face, Semantics
live-region label so screen readers + Playwright both hear it. The
consumer (terminal / Claude extensions) owns the `Terminal` model and
wires IPC pane.write / pane.output → terminal.write() themselves; the
widget deliberately has no IPC dependency so it stays trivially
testable.

ClidePaneChrome is the shared pane header — title + subtitle + leading
icon + trailing widgets + optional close button. The close button is
null-conditional so primary Claude panes (D-041, landing in step 7)
can render without one.

xterm 4.0.0 added as a justified runtime dep + logged in
licenses.yaml per D-042. 3 new widget tests cover header rendering,
close-button presence, and the close-tap round-trip.

Q-023 records the SSH-remote-development question so the daemon + IPC
seams don't accrete local-only assumptions during Tier 1-5.

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

app/pubspec.lock

@@ -56,6 +56,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.19.1"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      sha256: b30acd5944035672bc15c6b7a8b47d773e41e2f17de064350988c5d02adb1c68
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.2"
   equatable:
     dependency: transitive
     description:
@@ -72,6 +80,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.3.3"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      sha256: "16ed7b077ef01ad6170a3d0c57caa4a112a38d7a2ed5602e0aca9ca6f3d98da6"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.3"
   file:
     dependency: transitive
     description:
@@ -201,6 +217,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "5.0.5"
+  quiver:
+    dependency: transitive
+    description:
+      name: quiver
+      sha256: ea0b925899e64ecdfbf9c7becb60d5b50e706ade44a85b2363be2a22d88117d2
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.2"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -262,6 +286,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.7.10"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      sha256: f9049c039ebfeb4cf7a7104a675823cd72dba8297f264b6637062516699fa006
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.0"
   vector_math:
     dependency: transitive
     description:
@@ -286,6 +318,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.1.0"
+  xterm:
+    dependency: "direct main"
+    description:
+      name: xterm
+      sha256: "168dfedca77cba33fdb6f52e2cd001e9fde216e398e89335c19b524bb22da3a2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.0"
   yaml:
     dependency: "direct main"
     description:
@@ -294,6 +334,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.1.3"
+  zmodem:
+    dependency: transitive
+    description:
+      name: zmodem
+      sha256: "3b7e5b29f3a7d8aee472029b05165a68438eff2f3f7766edf13daba1e297adbf"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.0.6"
 sdks:
   dart: ">=3.9.0-0 <4.0.0"
   flutter: ">=3.32.0"