feat(studio): editor 0.7.0 — typed wires + animated flow + canvas depth

Picks up fai_studio_flow_editor 0.7.0 (commit 7aeeae7):

 - Wires take the colour of the data they carry. Inputs-
   endpoint edges show their type accent (text=blue,
   bytes=orange, json=purple, file=green, number=amber)
   so the operator can trace flow data by colour alone.
 - Edges entering a currently-running step animate as
   marching dashes in the wire's accent colour. Stops
   when the step completes. The canvas comes alive
   during runs.
 - Canvas backdrop is a subtle gradient (corners recessed,
   centre lit). Nodes get layered shadows; selected nodes
   wear an accent-coloured halo. 180 ms ease-out
   transitions on hover / select / status changes.

Version 0.53.6 -> 0.54.0 (minor bump — first wave of the
2026-feel visual refresh).

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

pubspec.lock

@@ -125,10 +125,10 @@ packages:
     description:
       path: "."
       ref: main
-      resolved-ref: "5ff7a1c11829cfb8e6ed38766dba5611d6a9128e"
+      resolved-ref: "7aeeae717f37f3dfefe5918ed2dba18a922a701d"
       url: "https://git.flemming.ai/fai/studio-flow-editor"
     source: git
-    version: "0.6.0"
+    version: "0.7.0"
   fake_async:
     dependency: transitive
     description: