fix(canvas): resolve named draw family in caret measurement

Implement Painter::measure_text_family on the native skia backend
(NativeBackend::measure_text_family_styled segments per-codepoint
against the real family, exactly like draw_text) and forward it through
NativeFrameBackend + BaselineAdjustingBackend so the family-aware
measure reaches skia through the wrappers. Fixes the ~6px caret drift
in every TextInputView/TextArea chrome input (property pills, chat, git,
settings) — measure now uses the same typeface paint does.

Bumps vendor/jian to 19fb00b (Painter::measure_text_family).

crates/op-editor-ui/src/widgets/text_input_backend.rs

@@ -267,4 +267,8 @@ impl RenderBackend for BaselineAdjustingBackend<'_> {
         self.inner
             .measure_text_styled(text, font_size, weight, italic)
     }
+
+    fn measure_text_family(&mut self, text: &str, font_size: f32, family: &str) -> f32 {
+        self.inner.measure_text_family(text, font_size, family)
+    }
 }

crates/op-host-native/src/backend/frame_backend.rs

@@ -284,4 +284,8 @@ impl<'a> RenderBackend for NativeFrameBackend<'a> {
         self.inner
             .measure_text_styled(text, font_size, weight, italic)
     }
+
+    fn measure_text_family(&mut self, text: &str, font_size: f32, family: &str) -> f32 {
+        self.inner.measure_text_family(text, font_size, family)
+    }
 }

crates/op-host-native/src/backend/skia/text.rs

@@ -249,7 +249,24 @@ impl NativeBackend {
         weight: u16,
         italic: bool,
     ) -> f32 {
-        let segments = self.segment_text_styled(text, "", weight, italic);
+        self.measure_text_family_styled(text, font_size, "", weight, italic)
+    }
+
+    /// Like [`Self::measure_text_styled`] but resolves the per-codepoint
+    /// typeface against `family` — exactly as `draw_text` does for a run
+    /// carrying that family. The family-blind `measure_text*` pass `""`
+    /// (bundled Roboto); chrome inputs that DRAW in a named family (e.g.
+    /// "Inter") must measure with that same family so their caret /
+    /// selection geometry lines up with the painted glyphs.
+    pub fn measure_text_family_styled(
+        &mut self,
+        text: &str,
+        font_size: f32,
+        family: &str,
+        weight: u16,
+        italic: bool,
+    ) -> f32 {
+        let segments = self.segment_text_styled(text, family, weight, italic);
         if segments.is_empty() {
             return 0.0;
         }
@@ -262,6 +279,12 @@ impl NativeBackend {
         advance
     }
 
+    /// Family-aware width at the default weight/upright — the measurement
+    /// backing `Painter::measure_text_family` for caret positioning.
+    pub fn measure_text_family(&mut self, text: &str, font_size: f32, family: &str) -> f32 {
+        self.measure_text_family_styled(text, font_size, family, 400, false)
+    }
+
     /// Render every shaped run in the layout via cached typefaces +
     /// `Canvas::draw_str` (Step 4 perf fix — see comment on the
     /// `typeface` / `cjk_typeface` fields).

vendor/jian

@@ -1 +1 @@
-Subproject commit ce19bed8a086cd18541c4715cdc308a2cfb5e2fb
+Subproject commit 19fb00ba88a5be0e15f7d2b5468337cdb0037984