feat: add Unmeasured filter chip to the sample table

Complement of Measured (rotation count <= 1): one click shows
everything still to be done, so it can be selected wholesale and
queued. Plain chip like All - unmeasured rows carry no tint, so
there is no legend color to wear; cross-status marks (queued/
flagged) show like in the Measured view.

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

src/aare/gui/models/user_sample_model.py

@@ -92,7 +92,8 @@ class UserSampleSpreadsheet(QAbstractTableModel):
         # SampleQueueSpreadsheet.
         self.queued_ids: set[int] = set()
         self.flagged_ids: set[int] = set()
-        # None = All; otherwise "queued" | "flagged" | "measured" (chip row).
+        # None = All; otherwise "queued" | "flagged" | "measured" |
+        # "unmeasured" (chip row).
         self.status_filter: str | None = None
 
         self._sort()
@@ -150,7 +151,7 @@ class UserSampleSpreadsheet(QAbstractTableModel):
             return SAMPLE_STATUS_FLAGGED_BG if flagged else None
         if self.status_filter == "flagged":
             return SAMPLE_STATUS_QUEUED_BG if queued else None
-        if self.status_filter == "measured":
+        if self.status_filter in ("measured", "unmeasured"):
             if queued:
                 return SAMPLE_STATUS_QUEUED_BG
             return SAMPLE_STATUS_FLAGGED_BG if flagged else None
@@ -263,6 +264,9 @@ class UserSampleSpreadsheet(QAbstractTableModel):
             rows = [r for r in rows if r.db_id in self.flagged_ids]
         elif self.status_filter == "measured":
             rows = [r for r in rows if self._measured(r)]
+        elif self.status_filter == "unmeasured":
+            # Everything still to be done — the view to select-all and queue.
+            rows = [r for r in rows if not self._measured(r)]
 
         # Default filter by User using current p-group if no explicit filter set
         filters: dict[int, str] = {

src/aare/gui/panels/tell_sample_panel.py

@@ -158,6 +158,7 @@ class TellSamplePanel(QFrame):
             ("Queued", "queued"),
             ("Flagged", "flagged"),
             ("Measured", "measured"),
+            ("Unmeasured", "unmeasured"),
         ):
             if key == "queued":
                 chip = QueueDropChip(label, self)
@@ -175,6 +176,11 @@ class TellSamplePanel(QFrame):
                 chip = QPushButton(label, self)
                 if key == "measured":
                     chip.setToolTip("Filter measured samples (automatic: rotation count > 1)")
+                elif key == "unmeasured":
+                    chip.setToolTip(
+                        "Filter samples not yet measured — select all here to queue"
+                        " everything still to be done"
+                    )
             chip.setCheckable(True)
             chip.setChecked(key is None)
             chip.setProperty("status_key", key)

tests/unit/gui/test_models.py

@@ -200,6 +200,9 @@ def test_status_filter_selects_rows(status_model):
     assert {model.get_id(r).db_id for r in range(model.rowCount())} == {3}
     model.set_status_filter("measured")
     assert {model.get_id(r).db_id for r in range(model.rowCount())} == {4}
+    # Unmeasured is the complement: everything still to be done.
+    model.set_status_filter("unmeasured")
+    assert {model.get_id(r).db_id for r in range(model.rowCount())} == {1, 2, 3}
     model.set_status_filter(None)
     assert model.rowCount() == 4