Half-height unit uses lower half of panel box; bump to 0.87

Changed from top half (y0=92.8, y1=103.8) to bottom half (y0=103.8,
y1=114.8). The label baseline sits at y≈101.5mm, so the lower half
starts 2.3mm below it — clean visual separation without the unit
appearing high up on the panel.

k8s/deployment.yaml

@@ -15,7 +15,7 @@ spec:
     spec:
       containers:
         - name: m1730-generator
-          image: git.baumann.gr/adebaumann/m1730-generator:0.86
+          image: git.baumann.gr/adebaumann/m1730-generator:0.87
           imagePullPolicy: Always
           ports:
             - containerPort: 5000

web/app.py

@@ -9,7 +9,7 @@ from fontTools.pens.svgPathPen import SVGPathPen
 
 app = Flask(__name__)
 
-VERSION = "0.86"
+VERSION = "0.87"
 
 _LOGO_PATH = pathlib.Path(__file__).parent / 'static' / 'logo.png'
 _LOGO_B64 = base64.b64encode(_LOGO_PATH.read_bytes()).decode()
@@ -74,7 +74,7 @@ _FRAC_SIDE  = 0.12
 
 _UNIT_BOX_X0, _UNIT_BOX_X1 = 39.6, 57.4
 _UNIT_BOX_Y0, _UNIT_BOX_Y1 = 92.8, 114.8
-_UNIT_BOX_HALF_Y1 = (_UNIT_BOX_Y0 + _UNIT_BOX_Y1) / 2  # 103.8 — upper half of panel
+_UNIT_BOX_HALF_Y0 = (_UNIT_BOX_Y0 + _UNIT_BOX_Y1) / 2  # 103.8 — bottom half starts here
 
 
 def _glyph_svg(ch: str, x: float, y: float, fs: float, fill: str, fd: _FontData):
@@ -245,10 +245,11 @@ def _has_markup(s: str) -> bool:
     return any(c in s for c in '^_') or ('{' in s and '}' in s)
 
 
-def _markup_unit_svg(unit: str, fd: _FontData, fill='#1a1a1a', box_y1=None) -> str:
+def _markup_unit_svg(unit: str, fd: _FontData, fill='#1a1a1a', box_y0=None, box_y1=None) -> str:
     nodes = _parse_markup(unit)
     x0, x1 = _UNIT_BOX_X0, _UNIT_BOX_X1
-    y0, y1 = _UNIT_BOX_Y0, (box_y1 if box_y1 is not None else _UNIT_BOX_Y1)
+    y0 = box_y0 if box_y0 is not None else _UNIT_BOX_Y0
+    y1 = box_y1 if box_y1 is not None else _UNIT_BOX_Y1
     xc, yc = (x0 + x1) / 2, (y0 + y1) / 2
 
     w1 = _measure(nodes, 1.0, fd)
@@ -320,7 +321,7 @@ def generate_svg(unit, min_val, max_val, range_label, big_ticks, small_ticks, la
                  use_paths=True, scale_type='linear', custom_labels=None, label_size=9,
                  font_key=None, half_height_unit=False):
     fd = _FONTS.get(font_key) or _FONTS.get(_DEFAULT_FONT) or next(iter(_FONTS.values()))
-    unit_box_y1 = _UNIT_BOX_HALF_Y1 if half_height_unit else None
+    unit_box_y0 = _UNIT_BOX_HALF_Y0 if half_height_unit else None
 
     if scale_type == 'log':
         if min_val <= 0 or max_val <= 0:
@@ -432,7 +433,7 @@ def generate_svg(unit, min_val, max_val, range_label, big_ticks, small_ticks, la
     # correct sizing for all fonts. Text mode for plain normal-height units
     # keeps live <text> nodes; half-height always uses paths for correct centering.
     if use_paths or _has_markup(unit) or half_height_unit:
-        unit_svg = '    ' + _markup_unit_svg(unit, fd, box_y1=unit_box_y1)
+        unit_svg = '    ' + _markup_unit_svg(unit, fd, box_y0=unit_box_y0)
     else:
         fs = _unit_font_size(unit, fd)
         unit_svg = (