input_render: schema-aware classify_input for wrong-count value lists

classify_input was schemaless; wrong-count Form B value lists
(`insert into Customers values ('Alice')` against a 3-column table)
showed as Valid until submit. Add classify_input_with_schema that
threads the SchemaCache through parse_command_with_schema and wire
render_input_runs to use it. Schemaless classify_input is kept public
for handoff-11/12 regression tests that exercise schema-independent
positions.

src/input_render.rs

@@ -24,6 +24,7 @@
 
 use ratatui::style::{Modifier, Style};
 
+use crate::dsl::parser::parse_command_with_schema;
 use crate::dsl::walker;
 use crate::dsl::{ParseError, parse_command};
 use crate::theme::Theme;
@@ -66,7 +67,7 @@ pub fn render_input_runs(
     cache: &crate::completion::SchemaCache,
 ) -> Vec<StyledRun> {
     let mut runs = lex_to_runs(input, theme);
-    if let InputState::DefiniteErrorAt(pos) = classify_input(input) {
+    if let InputState::DefiniteErrorAt(pos) = classify_input_with_schema(input, cache) {
         overlay_error(&mut runs, pos, theme);
     }
     if let Some(inv) = crate::completion::invalid_ident_at_cursor(input, cursor_byte, cache) {
@@ -98,13 +99,45 @@ pub enum InputState {
 }
 
 /// Classify `input` into one of the three mid-typing states.
-/// Cheap (lex + parse) per ADR-0022 §13.
+///
+/// Schemaless. Wrong-count / wrong-type value-list cases that
+/// only the schema-aware parser would catch surface as `Valid`
+/// here. For UX-correct classification at typing time prefer
+/// [`classify_input_with_schema`] — `render_input_runs` always
+/// does. Kept public because handoff-11/12 regression tests use
+/// it for schema-independent assertions (cheap, predictable).
+///
+/// ADR-0022 §13: cheap (lex + parse).
 #[must_use]
 pub fn classify_input(input: &str) -> InputState {
     if input.trim().is_empty() {
         return InputState::Empty;
     }
-    match parse_command(input) {
+    classify_parse_result(parse_command(input))
+}
+
+/// Schema-aware variant of [`classify_input`].
+///
+/// Threads the `SchemaCache` through `parse_command_with_schema`
+/// so that typed-slot rejections (Phase D — wrong-count Form B
+/// value lists, wrong-type column values, etc.) surface as
+/// `DefiniteErrorAt`/`IncompleteAtEof` at typing time, before
+/// the user submits.
+#[must_use]
+pub fn classify_input_with_schema(
+    input: &str,
+    cache: &crate::completion::SchemaCache,
+) -> InputState {
+    if input.trim().is_empty() {
+        return InputState::Empty;
+    }
+    classify_parse_result(parse_command_with_schema(input, cache))
+}
+
+fn classify_parse_result(
+    result: Result<crate::dsl::Command, ParseError>,
+) -> InputState {
+    match result {
         Ok(_) => InputState::Valid,
         Err(ParseError::Empty) => InputState::Empty,
         Err(err @ ParseError::Invalid { position, .. }) => {