Scripting: named signal vars, shared vars dict, control scripts, code templates

- Named variables in expressions: source channel IDs injected as Python
  identifiers alongside x[] (e.g. write `A0 * 2` instead of `x[0] * 2`)
- Shared `vars` dict on SignalProcessor accessible from all expressions,
  functions, and control scripts; persisted in .labdaq profiles
- Per-derived-channel `state` dict for persistent computation state in
  custom scripts
- Control widgets gain optional on_action_script (Python snippet with
  value, vars, channels, math in scope); syntax-checked in editor dialog
- Built-in derived kinds (derivative, rms, power, etc.) now show their
  Python implementation as read-only code previews; "Edit as Custom Script"
  converts to custom_script kind with template pre-filled

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/core/profile.py b/core/profile.py
index 39cb3ca..16c923f 100644
--- a/core/profile.py
+++ b/core/profile.py
@@ -80,6 +80,8 @@ class Profile:
     # plugin_state = {plugin_id: plugin.get_save_state()}
     plugins_enabled: List[str]                 = field(default_factory=list)
     # plugins_enabled = [plugin_id, ...]  — which plugins were on when saved
+    script_vars:  Dict[str, Any]               = field(default_factory=dict)
+    # script_vars — shared vars dict accessible as `vars` in all expressions
 
     def to_json(self) -> str:
         return json.dumps(asdict(self), indent=2)
@@ -99,6 +101,7 @@ class Profile:
             settings        = d.get("settings", {}),
             plugin_state    = d.get("plugin_state", {}),
             plugins_enabled = d.get("plugins_enabled", []),
+            script_vars     = d.get("script_vars", {}),
         )
 
     def save(self, path: str):
@@ -213,6 +216,10 @@ class ProfileManager:
 
         p.settings = dict(settings)
 
+        # Shared script variables
+        with processor._lock:
+            p.script_vars = dict(processor._script_vars)
+
         # Plugin state + enabled list
         if plugin_manager is not None:
             p.plugins_enabled = plugin_manager.get_enabled_ids()
@@ -349,6 +356,11 @@ class ProfileManager:
         specs = [ControlSpec.from_dict(d) for d in profile.controls]
         control_panel.load_specs(specs)
 
+        # ── Script vars ──────────────────────────────────────────────────
+        if profile.script_vars:
+            with processor._lock:
+                processor._script_vars.update(profile.script_vars)
+
         # ── Settings ─────────────────────────────────────────────────────
         settings_ref.update(profile.settings)