Release 1.4.1: a Bonded checkbox in the terminal tables

The config's per-terminal bonded key becomes editable in the dialog
(previously file-only, shown as a text suffix): checked, the
terminal's contacts short into one internally joined lug - the total
value stays prescribed, the per-contact split is a solve outcome.
Same-name rectangle groups seed it checked as before; unchecking one
falls back to the per-cell area share, and checking a single-contact
terminal gives it an equipotential-lug contact instead of uniform
injection. Save config... writes the flag back (removed when
unchecked - false is the schema default). With this, every
non-structural terminal option (active, values, v_oc, contact layer,
bonded, comment) is table-editable.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

fill_resistance/configfile.py

@@ -769,8 +769,9 @@ def save_classic_config(path: Path, selection) -> None:
 def updated_terminals_json(raw_terminals: list, rows: list) -> list:
     """Config-backed PDN save: each raw terminal object is deep-copied
     verbatim (parts, "_"-prefixed keys preserved) and only the
-    dialog-editable values - I / R_out / V_oc and the terminal-level
-    contact layer - are written back POSITIONALLY: the dialog never
+    dialog-editable values - I / R_out / V_oc, the bonded flag and the
+    terminal-level contact layer - are written back POSITIONALLY: the
+    dialog never
     reorders its tables, so index i is the same terminal in both lists.
     A supply row's v_oc of None REMOVES the key (restoring the
     defaults-to-v_nominal semantics); a contact of "auto" removes the
@@ -800,6 +801,10 @@ def updated_terminals_json(raw_terminals: list, rows: list) -> list:
             t["contact"] = contact
         else:
             t.pop("contact", None)
+        if getattr(row, "bonded", False):
+            t["bonded"] = True
+        else:
+            t.pop("bonded", None)       # false is the schema default
         if getattr(row, "active", True):
             t.pop("active", None)       # true is the schema default
         else: