feat: dialog for per-model context size, vision and prices

Field conversion is separated from the widget so the part with the edge
cases is testable without a running Qt application. Vision is tri-state
through a binary checkbox: an unchecked box with an unknown prefill stays
unknown rather than writing False, which would shadow a provider-level
vision=True through models.resolve's pick().

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

1 files changed, 54 insertions, 0 deletions

diff --git a/test_llamachat.py b/test_llamachat.py
index 1217176..b561b66 100755
--- a/test_llamachat.py
+++ b/test_llamachat.py
@@ -1972,6 +1972,59 @@ def test_multi_client():
     print("ok  multi-provider client")
 
 
+def test_model_dialog_values():
+    """The dialog's field text converts to ModelInfo, blanks meaning unknown."""
+    from llamachat import models, modeldialog
+
+    # Everything filled in.
+    info = modeldialog.to_info(
+        ctx_text="32768", vision=True, in_text="1.2", out_text="0.9"
+    )
+    assert info.ctx_size == 32768
+    assert info.vision is True
+    assert info.price_in == 1.2
+    assert info.price_out == 0.9
+
+    # Blank prices are legal and mean unpriced, not free.
+    blank = modeldialog.to_info(
+        ctx_text="8192", vision=False, in_text="", out_text="  "
+    )
+    assert blank.ctx_size == 8192
+    assert blank.price_in is None
+    assert blank.price_out is None
+
+    # Garbage reads as unknown rather than crashing the dialog.
+    junk = modeldialog.to_info(
+        ctx_text="not a number", vision=False, in_text="free", out_text=""
+    )
+    assert junk.ctx_size is None
+    assert junk.price_in is None
+
+    # Vision is tri-state through a binary checkbox: an unchecked box with an
+    # unknown prefill stays unknown, instead of writing False, which would
+    # shadow a provider-level vision=True through models.resolve's pick(). A
+    # known prefill (True or False) left unchecked is a real "no".
+    assert modeldialog.to_info(
+        ctx_text="", vision=True, in_text="", out_text=""
+    ).vision is True
+    assert modeldialog.to_info(
+        ctx_text="", vision=False, in_text="", out_text=""
+    ).vision is None
+    assert modeldialog.to_info(
+        ctx_text="", vision=False, in_text="", out_text="", vision_prefill=True
+    ).vision is False
+    assert modeldialog.to_info(
+        ctx_text="", vision=False, in_text="", out_text="", vision_prefill=False
+    ).vision is False
+
+    # Prefill is the inverse: unknown becomes an empty field.
+    assert modeldialog.to_fields(models.ModelInfo()) == ("", False, "", "")
+    assert modeldialog.to_fields(
+        models.ModelInfo(ctx_size=4096, vision=True, price_in=0.5)
+    ) == ("4096", True, "0.5", "")
+    print("ok  model dialog value conversion")
+
+
 class _FakeResponse:
     """Enough of an http.client response for urlopen's context manager."""
 
@@ -2734,6 +2787,7 @@ if __name__ == "__main__":
     test_token_column_migration()
     test_client_auth_header()
     test_multi_client()
+    test_model_dialog_values()
     test_search_tool_schema()
     test_search_results_sanitising()
     test_tool_call_accumulation()