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/assets/licenses.yaml

@@ -75,6 +75,18 @@ dependencies:
       YAML parser for theme files and extension manifests. Justified
       exception to prefer-zero-deps; Dart-team maintained.
 
+  - name: xterm
+    kind: dart-package
+    version: "4.0.0"
+    homepage: https://pub.dev/packages/xterm
+    license: MIT
+    purpose: >-
+      Flutter-native terminal emulator (ANSI / xterm / truecolor
+      parser + renderer). Powers every pane that renders a PTY —
+      general terminal, Claude, diff views running shell commands.
+      Writing a vt100 / ANSI parser is weeks of work for no fidelity
+      gain.
+
   - name: ffi
     kind: dart-package
     version: "2.1.3"