Fix UI overlaps: SpeedFader vs status labels, packed ship lab layout (#67, #71)

SpeedFader was missing anchor_top/anchor_bottom = 1.0 in both Main.tscn
and PlanetSurface.tscn, so it rendered TOP-anchored at a fixed y while
its siblings (LaserStatus, GasBombStatus) are bottom-anchored - on a
720x1280 viewport both landed in the same screen region, directly on
top of each other. Properly bottom-anchored SpeedFader now, positioned
above both status labels instead.

Separately, the ship lab's 7 vessel-name labels (#57-#59 grew the
roster from 4 to 7 without widening their row) were laid out 120px wide
on only a 90px pitch - a fixed 30px overlap between adjacent labels
regardless of text length, worse for genuinely long names like
"Interceptor"/"Transporter". Narrowed each label to fit its own lane
with real gaps, dropped the font size, and enabled word-wrap; shifted
the upgrade-card rows below down to give the now-taller label row room.

PlanetSurface.tscn

@@ -163,10 +163,12 @@ visible = false
 mouse_filter = 2
 anchor_left = 1.0
 anchor_right = 1.0
+anchor_top = 1.0
+anchor_bottom = 1.0
 offset_left = -94
 offset_right = -24
-offset_top = 740
-offset_bottom = 920
+offset_top = -720
+offset_bottom = -560
 script = ExtResource("17")
 glow_color = Color(0.5, 0.18, 0.6, 1)
 core_color = Color(0.02, 0.09, 0.15, 1)