Implemented confi snapshots

TODO.md

@@ -12,7 +12,13 @@
       - user can compare two instances: show unified diff or side by side diff
       - etc...
   - [x] user can apply and save configuration instances from manager
-  - [ ] in logic editor and control loop add nodes to read/write/create/apply config instances
+  - [x] **instance snapshot**: create a new instance from the current live value of all of a set's target signals (optional label, else auto name) — exposed in the config editor (⎙ Snapshot), control loop (`action.config.snapshot`) and logic editor (`action.config.snapshot`)
+  - [x] **live diff**: compare a stored instance against current signal values ("Diff vs current" button → `/config/instances/{id}/livediff`)
+  - [x] git-style versioning for config sets and instances: fork any revision, click to view, promote to current, with unified / side-by-side diff (shared `VersionTree`)
+  - [x] in logic editor and control loop add nodes to read/write/create/apply config instances
+    - [x] **apply** and **read** config-instance nodes in both control logic (server Go) and panel logic (client TS)
+    - [x] **create / write** nodes (mutate versioned instances from automation) in both engines
+    - [x] **Config Selector** panel widget: operator picks an instance of a chosen set (optionally a subset) from a combo, writing its id to a panel-local string variable; apply/read/write panel-logic nodes can read their instance dynamically from that variable ("From variable" source)
   - [x] support for all supported types (number, bools, enums, arrays, string etc)
   - [x] ux elements for config set
     - [x] the configuration editor should automatically get type and info from signal when possible (type is read-only, auto-derived from the bound signal)
@@ -25,17 +31,20 @@
       - for arrays: import csv option, display points as mini plot (+ open dialog plot with more info), manual enter points via table like interface
     - automatically fill with default or existing values (when forking an existing instance)
     - explicity show errors/missing info and give additional info on hover
-  - [ ] add advanced validation / transformation framework to configurations using custom CUE rules:
-    - backend should run validation / transformation rules
-    - user can create/edit/delete/compare rules from webui:
-      - integrate syntax highlight
-      - integrate autocomplete for signals names and cue grammars
-      - integrate cue lsp
-    - when validation fail error should be propagated to user in the webui
-    - all action should be tracked via history management and audit
+  - [x] add advanced validation / transformation framework to configurations using custom CUE rules:
+    - [x] backend runs validation / transformation rules (real CUE via `cuelang.org/go`; `internal/confmgr/cue.go`). Rules are a third versioned `Kind` bound to a set; evaluated on instance create/update — violations block the save, concrete derivations transform & persist the values
+    - [x] user can create/edit/delete/compare rules from webui (Rules tab in ConfigManager; git-style versioning + side-by-side/unified source diff)
+      - [x] integrate syntax highlight (hand-rolled `CueEditor.tsx`, mirroring `LuaEditor`)
+      - [x] integrate autocomplete for signals names and cue grammars (param keys + target signals + CUE keywords/types; Ctrl+Space)
+      - [ ] ~~integrate cue lsp~~ — descoped: a separate language-server process does not fit the no-npm / single portable-binary architecture
+    - [x] when validation fails the error is propagated to the user (live `/config/rules/check` panel while editing; save returns the structured violation)
+    - [x] all actions tracked via history (versioned rules) + audit (`config.rule.create/update/delete/promote/fork`)
 - [ ] Improve UX:
-  - [x] Synthetic editor:
-    - [x] color code the node link by type
+  - [ ] Synthetic editor:
+    - [ ] color code the node link by type
+      - [ ] edges color depends on type (e.g. float) including arrays
+      - [ ] input / outputs are color coded (if can accept many, gray, otherwise specific color, can be dynamic)
+      - [ ] can not connect input / output that are not compatible
     - [x] hover on a block in error should show the reason
     - [x] add proper array functionality
     - [x] add shortcut to add Signals (S) and nodes (N) with HUD
@@ -44,7 +53,12 @@
     - [ ] add widgets such as toggle switch, table and other industrial hmi widgets
     - [ ] add container widgets: labelled/title pane, tab panes, collapsable panes etc
   - [ ] plot pane:
-    - add toolbar
+    - [ ] add toolbar
+    - [ ] add time window selector to toolbar
+    - [ ] plot x-axis synchronised (option to unlink in toolbar)
+    - [ ] cursors and measuraments
+    - [ ] pause/resume
+    - [ ] save screenshot
   - [ ] clean ui:
     - create small statusbar where connection widget and other status related info will be placed
     - group advanced items (audit/control loops/config manager etc) in a tool menu or something similar to not fill the toolbar
@@ -54,16 +68,16 @@
     - array functions should work with new local array
 - [ ] Control loop:
   - add full support to server side array values
-- [ ] Implement git style versioning for: synthetic variable, panels, control logic:
-  - possibility to fork any version
-  - click to view the version
-  - possibility to view graphical diff between versions (side by side or unified diff)
-  - simple slick versioning pane:
-    - vertical tree like
-    - each version represented by a circle
-    - active (the one currently view/edited) version has circle bigger then rest
-    - selected (the one that will be executed/showed by user) version has circle full, not active only border
-    - unsaved / new version appear with connection line dashed
+- [x] Implement git style versioning for: synthetic variable, panels, control logic:
+  - [x] possibility to fork any version
+  - [x] click to view the version
+  - [x] possibility to view graphical diff between versions (side by side or unified diff)
+  - [x] simple slick versioning pane:
+    - [x] vertical tree like
+    - [x] each version represented by a circle
+    - [x] active (the one currently view/edited) version has circle bigger then rest
+    - [x] selected (the one that will be executed/showed by user) version has circle full, not active only border
+    - [x] unsaved / new version appear with connection line dashed
 - [ ] Implement admin pane: create / manage groups, set users permits, manage auditors etc
 - [ ] Implement new datasources:
   - [ ] Finalize alarm service