style(theme): make Jade's gold vein follow rounded corners

Jade's edge-trace hero hand-walked the panel perimeter as straight line
segments, so rounded corners chamfered into flat polygons. Retire it in
favour of the gradient-border effect, which draws via AddRect and hugs
the real corner arcs.

- theme_effects: drawGradientBorderShift gains phaseOffset + alphaMul;
  drawPanelEffects now draws it on every glass panel (position-phased so
  panels drift like veins at different depths, 0.6x alpha vs the active
  nav button), gated behind a new opt-in gradient-border-panels flag so
  button-only themes (Obsidian) are unaffected.
- jade.toml: edge-trace off; gradient-border-panels on, speed 0.10,
  jade->gold; jade motes + viewport wash/vignette kept.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

res/themes/jade.toml

@@ -115,10 +115,13 @@ surface-inline-alpha = 0.58
 background-inline-alpha = 0.40
 
 # ---------------------------------------------------------------------------
-# Theme Visual Effects — Jade (polished stone sheen + gold veining)
-#   A soft jade specular highlight drifts across panels like light on
-#   polished nephrite; the active sidebar button traces a jade-to-gold
-#   border echoing the stone's veins — restrained, like Obsidian.
+# Theme Visual Effects — Jade (veins of gold shifting through the stone)
+#   Jade's signature is a slow jade→gold color-shifting border on every glass
+#   panel + the active nav button — a vein of gold surfacing through nephrite.
+#   It's drawn via AddRect so it hugs the real rounded corners (no polygonal
+#   edge-trace). Sparse jade motes drift up the viewport. No other theme turns
+#   gradient-border-panels on, so the panel-wide vein is Jade's own —
+#   deliberately NOT Obsidian's specular glare.
 # ---------------------------------------------------------------------------
 [effects]
 hue-cycle-enabled            = { size = 0.0 }
@@ -130,25 +133,45 @@ shimmer-enabled              = { size = 0.0 }
 positional-hue-enabled       = { size = 0.0 }
 
 glow-pulse-enabled           = { size = 0.0 }
-edge-trace-enabled           = { size = 0.0 }
 
-# Specular glare — soft blurred jade highlights
-specular-glare-enabled       = { size = 1.0 }
+# Edge-trace OFF — its hand-walked perimeter chamfers rounded corners.
+# Jade's vein is the gradient-border below (corner-clean via AddRect).
+edge-trace-enabled           = { size = 0.0 }
+edge-trace-speed             = { size = 0.16 }
+edge-trace-length            = { size = 0.34 }
+edge-trace-thickness         = { size = 1.6 }
+edge-trace-alpha             = { size = 0.55 }
+edge-trace-color             = { color = "#C9A24E" }
+
+# Specular glare OFF — that's Obsidian's signature; Jade shouldn't echo it.
+specular-glare-enabled       = { size = 0.0 }
 specular-glare-speed         = { size = 0.018 }
 specular-glare-intensity     = { size = 0.008 }
 specular-glare-radius        = { size = 0.65 }
 specular-glare-count         = { size = 1.0 }
 specular-glare-color         = { color = "rgba(150,220,180,1.0)" }
 
-# Jade-to-gold color-shifting border on the active sidebar button
+# HERO — vein of gold: a slow jade→gold color-shifting border on the active
+# nav button AND (via gradient-border-panels) every glass panel. Drawn with
+# AddRect so it follows the rounded corners exactly. Panels drift at a softer
+# alpha and position-phased offset, so a screenful reads like veins at
+# different depths rather than one synchronized pulse.
 gradient-border-enabled      = { size = 1.0 }
-gradient-border-speed        = { size = 0.12 }
+gradient-border-panels       = { size = 1.0 }
+gradient-border-speed        = { size = 0.10 }
 gradient-border-thickness    = { size = 1.5 }
 gradient-border-alpha        = { size = 0.55 }
 gradient-border-color-a      = { color = "#7FD1B5" }
 gradient-border-color-b      = { color = "#C9A24E" }
 
-ember-rise-enabled           = { size = 0.0 }
+# Ambient jade motes — sparse, slow, cool green particles drifting up the
+# viewport (recolored ember-rise; a different mood from dragonx's fire embers).
+ember-rise-enabled           = { size = 1.0 }
+ember-rise-count             = { size = 5.0 }
+ember-rise-speed             = { size = 0.18 }
+ember-rise-particle-size     = { size = 1.4 }
+ember-rise-alpha             = { size = 0.26 }
+ember-rise-color             = { color = "#7FD1B5" }
 
 # Shader-like viewport overlay — deep green stone atmosphere
 viewport-wash-enabled        = { size = 1.0 }