refactor(ui): clarify shared field CSS ownership

docs/CODE-BOUNDARIES.md

@@ -749,6 +749,14 @@ teardown. CCTV effective-pose conversion and tuner/device operations remain
 feature responsibilities. A Vue replacement can reuse this contract and CSS;
 it replaces DOM construction, rather than adding a second state owner.
 
+The shared stylesheet owns field surfaces and disabled opacity; feature and theme
+palettes use `--gev-field-background`, `--gev-field-border-color`,
+`--gev-field-color` and `--gev-field-disabled-opacity`. Radio retains its own
+compact density and arrow space. CCTV owns calibration editor width in
+`cctv.css`; the shared inline density does not impose a feature-specific width.
+Cyber supplies a shared-field palette explicitly and keeps its legacy native
+field rules separate, so Radio's palette remains an intentional exception.
+
 ### Read-only status badges
 
 `src/ui/statusBadge.js` constructs/updates ordinary badges without listeners,

docs/CURRENT-STATE.md

@@ -1233,6 +1233,17 @@ Feature owners retain bounds, steps, formatted values, input/change timing and
 listener cleanup. The radio tuning dial, imagery comparison divider and event
 comparison/progression controls keep their specialized presentation and behavior.
 
+## Shared control CSS ownership
+
+Shared styles own ordinary control surfaces and interaction states; feature CSS
+owns surrounding layout and context-specific sizing. CCTV's calibration editor
+width lives in `ui/styles/cctv.css`, while the shared inline field variant owns
+only density and spinner treatment. Radio supplies its field palette and disabled
+opacity through the `--gev-field-*` variables, retaining compact typography and
+arrow space locally. Cyber supplies shared-field palette variables explicitly;
+its legacy native-field palette rules exclude `.gev-field`. These ownership
+boundaries preserve the current Tactical/Cyber appearance and native behavior.
+
 ## Ordinary status badges
 
 CCTV source/frame labels, calibration provenance and Weather coverage labels use