We need to build a single screen using openui-lang. Must include all items. Let's parse requirements:

1. shipments in transit with origin, destination, ETA and status for each. So a list of shipments (maybe a Table or ListBlock). Table seems suitable because columns: origin, destination, ETA, status. Use Table with columns.

2. delayed shipments called out. Could be a Callout or TextCallout or Alert. Probably a Callout with variant "warning" or "error" showing delayed shipments. Could be a Callout with title "Delayed Shipments" and description list? But description expects a string, maybe a summary. Could embed a small list via ListBlock? But simpler: a Callout with title and description summarizing delayed shipments (maybe a count). However requirement: "delayed shipments called out". So we need a component that highlights delayed shipments. Could use a Callout with variant "warning" and title "Delayed Shipments". Description maybe empty or a brief note. But we also need to show each delayed shipment? Might be too many. Maybe we just show a Callout that says "Delayed shipments: 5". Could also use a ListBlock of delayed shipments. But requirement says "delayed shipments called out" – likely a Callout component that draws attention. We'll include a Callout with title "Delayed Shipments" and description "5 shipments delayed". That covers.

3. on-time percentage this month. Could be a Badge or TextContent with large number. Maybe a Badge with variant "success" showing percentage. Or a TextCallout. Let's use a Badge: Badge("85%", "success") maybe. Or a TextCallout. We'll choose Badge.

4. volume split by carrier. That's a chart: maybe a BarChart or PieChart. Since it's volume split by carrier, a BarChart (horizontal) or PieChart. Use BarChart with categories carriers, series volumes. So define HorizontalBarChart with labels carriers, series volumes. Or use PieChart. Let's use HorizontalBarChart.

5. a way to search by route. Could be a Form with a search field (Input) and maybe a button. Or a Search component? Not defined. Use Form with a TextArea or Input for route search. We'll create a Form with a field "route search". Use FormControl with Input placeholder "Search route". And maybe a button "Search". But requirement just "a way to search by route". So we can include a Form with an Input field.

6. average cost per shipment. Could be a Badge or TextCallout. Use Badge with value "$45". Or a TextCallout. Let's use Badge.

7. weekly volume across the past two months. That's a chart: maybe a LineChart or BarChart. Use LineChart with weekly labels (W1..W8) and series volume. We'll define LineChart.

8. a way to flag a shipment. Could be a Button with action maybe "flag". Or a CheckBox. Could include a FormControl with CheckBoxGroup? Or a Button that triggers flag. Simpler: a Button "Flag shipment". But need a way; maybe a Form with a CheckBox to flag. Let's include a CheckBoxItem within a Form. Or a Button with action "flag". We'll include a Button "Flag shipment" as part of actions.

9. when the numbers were last refreshed. Could be a TextCallout or a Badge with date. Use TextCallout with variant "neutral" and title "Last refreshed". Description with date.

Now we need to structure root = Card([...]) with children list in reading order.

Reading order: maybe header, then shipments table, then delayed callout, then on-time badge, then volume by carrier chart, then search form, then average cost badge, then weekly volume chart, then flag button, then last refreshed callout.

Let's design components:

- header: CardHeader("Logistics Coordinator Board", "Key metrics and shipments")
- shipments table: Table(columns: [Col(...), Col(...), Col(...), Col(...)]) with data rows. We need to define data rows (maybe placeholder rows). Use dummy data: origin/destination/ETA/status. We'll create a few sample rows.

Columns: label, data, type. For each column we need label and data array. The data array length must match number of rows. Let's create 3 sample shipments.

Define k1 = Col("Origin", ["New York", "Los Angeles", "Chicago"], "string")? Wait data array must have same length as rows. Actually each column holds data for each row; so each column's data array length = number of rows. So we need to define rows count. Let's have 3 rows. Then each column's data array length 3.

Define:

shipmentRows = 3

colOrigin = Col("Origin", ["NYC", "LA", "Chicago"], "string") // but need same length as rows (3). We'll have 3 entries.

colDest = Col("Destination", ["Chicago", "NYC", "Denver"], "string")

colETA = Col("ETA", ["2025-10-01", "2025-10-03", "2025-09-28"], "string") maybe dates.

colStatus = Col("Status", ["In Transit", "In Transit", "Delayed"], "string") // one delayed.

But need to ensure each column has same number of values (3). Good.

Now table = Table(columns: [colOrigin, colDest, colETA, colStatus])

But need to define those columns first.

- delayed callout: Callout(variant: "warning", title: "Delayed Shipments", description: "3 shipments delayed") maybe.

- on-time percentage badge: Badge("85%", "success") maybe.

- volume split by carrier: HorizontalBarChart(labels: ["Carrier A", "Carrier B", "Carrier C"], series: [Series("Volume", [120, 80, 150])], variant: "grouped", xLabel: "Volume", yLabel: "Carrier")? Wait HorizontalBarChart expects labels (categories) and series (each series values). Since we have one series, we can define series as Series("Volume", [120,80,150]). So labels length 3.

Define:

carrierLabels = ["Carrier A", "Carrier B", "Carrier C"]
carrierSeries = Series("Volume", [120, 80, 150])
chartVolume = HorizontalBarChart(labels: carrierLabels, series: [carrierSeries], variant: "grouped", xLabel: "Volume", yLabel: "Carrier")

But note series expects (Series)[] i.e., array of Series. So we need [carrierSeries].

- search by route: Form with a field. Let's create a Form named "route-search". FormControl with Input for search. But we also need a button maybe. Let's create:

searchForm = Form("route-search", searchButtons, [searchControl])
searchControl = FormControl("Route", searchInput)
searchInput = Input("route", "Search route", "text") // type text

searchButtons = Buttons([searchBtn])
searchBtn = Button("Search", null, "primary") // action maybe null to send message.

But requirement just "a way to search by route". So this should suffice.

- average cost per shipment badge: Badge("$45", "success") maybe.

- weekly volume chart: LineChart with weekly labels (W1..W8) and series volume values. Define weeklyLabels = ["W1","W2","W3","W4","W5","W6","W7","W8"]; weeklySeries = Series("Volume", [30,45,50,40,60,55,70,80]) maybe. Then lineChart = LineChart(labels: weeklyLabels, series: [weeklySeries], variant: "natural", xLabel: "Week", yLabel: "Shipments").

- flag a shipment: maybe a Button "Flag shipment". But need a way; could be a Button with action maybe "flag". We'll include a Button "Flag shipment" as part of actions.

- last refreshed: TextCallout(variant: "neutral", title: "Data Refreshed", description: "Last refreshed: 2025-09-20 14:30 UTC") Or maybe a Badge. Use TextCallout.

Now we need to ensure all defined variables are referenced from root's children list.

Root children list must include all components in reading order. Let's list:

root = Card([header, shipmentsTable, delayedCallout, onTimeBadge, volumeChart, searchForm, avgCostBadge, weeklyChart, flagButton, refreshedCallout])

But need to ensure each component is defined before use. We'll define variables in order.

Define:

header = CardHeader("Logistics Coordinator Board", "Key metrics and shipments")

shipmentsTable = Table(columns: [originCol, destCol, etaCol, statusCol])

originCol = Col("Origin", ["NYC", "LA", "Chicago"], "string")
destCol = Col("Destination", ["Chicago", "NYC", "Denver"], "string")
etaCol = Col("ETA", ["2025-10-01", "2025-10-03", "2025-09-28"], "string")
statusCol = Col("Status", ["In Transit", "In Transit", "Delayed"], "string")

delayedCallout = Callout(variant: "warning", title: "Delayed Shipments", description: "3 shipments delayed")

onTimeBadge = Badge("85%", "success")

volumeChart = HorizontalBarChart(labels: ["Carrier A", "Carrier B", "Carrier C"], series: [Series("Volume", [120, 80, 150])], variant: "grouped", xLabel: "Volume", yLabel: "Carrier")

searchForm = Form("route-search", searchButtons, [searchControl])
searchControl = FormControl("Route", searchInput)
searchInput = Input("route", "Search route", "text")
searchButtons = Buttons([searchBtn])
searchBtn = Button("Search", null, "primary")

avgCostBadge = Badge("$45", "success")

weeklyChart = LineChart(labels: ["W1","W2","W3","W4","W5","W6","W7","W8"], series: [Series("Volume", [30,45,50,40,60,55,70,80])], variant: "natural", xLabel: "Week", yLabel: "Shipments")

flagButton = Button("Flag shipment", null, "primary") // maybe action null to send message.

refreshedCallout = TextCallout(variant: "neutral", title: "Data Refreshed", description: "Last refreshed: 2025-09-20 14:30 UTC")

Now ensure each defined variable is referenced in root children list.

Check:

header referenced - yes.

shipmentsTable referenced - yes.

originCol etc referenced inside shipmentsTable; they are defined but not referenced elsewhere. However rule: every variable (except root) MUST be referenced by at least one other variable. The columns are referenced inside shipmentsTable, which is referenced in root. So they are referenced.

delayedCallout referenced - yes.

onTimeBadge referenced - yes.

volumeChart referenced - yes.

searchForm referenced - yes.

searchControl referenced - yes.

searchInput referenced - yes.

searchButtons referenced - yes.

searchBtn referenced - yes.

avgCostBadge referenced - yes.

weeklyChart referenced - yes.

flagButton referenced - yes.

refreshedCallout referenced - yes.

Now need to ensure root children list includes all components in reading order. Let's decide order:

Reading order likely:

- CardHeader (title)
- Table (shipments)
- Callout (delayed)
- Badge (on-time)
- HorizontalBarChart (volume by carrier)
- Form (search)
- Badge (average cost)
- LineChart (weekly volume)
- Button (flag)
- TextCallout (refreshed)

But maybe we want the search form earlier? Not crucial. Ensure readability.

Now need to ensure all component arguments follow positional order.

Check each component signature.

CardHeader(title?: string, subtitle?: string) – we have title and subtitle.

Table(columns: (Col)[]) – we have columns list.

Col(label: string, data: (string | number)[], type?: "string" | "number" | "action") – we have label, data array, type.

Callout(variant: "info"|..., title: string, description: string) – we have variant, title, description.

Badge(text: string, variant?: ...) – we have text and variant.

HorizontalBarChart(labels: (string | number)[], series: (Series)[], variant?: ..., xLabel?: string, yLabel?: string) – we have labels, series array, variant, xLabel, yLabel.

Form(name: string, buttons: (Button)[], fields: (FormControl)[]) – we need name, buttons, fields. We'll set name "route-search". Buttons: [searchBtn]; fields: [searchControl].

FormControl(label: string, input: Input | TextArea | Select | DatePicker | Slider | CheckBoxGroup | RadioGroup, hint?: string) – we have label "Route", input searchInput.

Input(name: string, placeholder?: string, type?: ..., rules?: ..., value?: string) – we have name "route", placeholder "Search route", type "text". rules none, value none.

Buttons(buttons: (Button)[], direction?: "row" | "column") – we have [searchBtn]; direction maybe default row.

Button(label: string, action?: (string | number)[], variant?: ..., type?: ..., size?: ...) – we have label "Search", action null (so sends label), variant "primary". type maybe default "normal". size maybe default "medium". We'll just give label, action null, variant "primary". No other args.

LineChart(labels: (string | number)[], series: (Series)[], variant?: "linear"|"natural"|"step", xLabel?: string, yLabel?: string) – we have labels, series array, variant "natural", xLabel, yLabel.

Now ensure we have Series definition: Series(category: string, values: (string | number)[]) – we need to define Series objects. In HorizontalBarChart series: [Series("Volume", [120,80,150])]; In LineChart series: [Series("Volume", [30,45,...])].

Define:

volumeSeries = Series("Volume", [120, 80, 150])
weeklySeries = Series("Volume", [30,45,50,40,60,55,70,80])

Now ensure that Series is defined before use. We'll define them as variables.

Now check that all defined variables are referenced. The Series variables are referenced inside chart definitions, which are referenced in root. So they are referenced.

Now ensure root = Card([...]) is first line.

Now we need to ensure we include all required items:

1. shipments in transit with origin, destination, ETA and status for each – covered by Table.

2. delayed shipments called out – covered by Callout.

3. on-time percentage this month – Badge.

4. volume split by carrier – HorizontalBarChart.

5. a way to search by route – Form with Input.

6. average cost per shipment – Badge.

7. weekly volume across past two months – LineChart.

8. a way to flag a shipment – Button.

9. when numbers were last refreshed – TextCallout.

All covered.

Now need to ensure we use correct enum values. For Badge variant "success" is allowed. For Callout variant "warning" is allowed. For TextCallout variant "neutral" allowed.

Check that we used "warning" for Callout (allowed). "success" for Badge (allowed). "neutral" for TextCallout (allowed). "primary" for Button variant (allowed). "grouped" for HorizontalBarChart variant (allowed). "natural" for LineChart variant (allowed). "card" etc not needed.

Check that we used correct argument order.

Now ensure we didn't use named arguments. All arguments are positional.

Now verify that each component's arguments are in correct order.

Let's write out definitions line by line.

First line: root = Card([...]) – we need to list children in order.

We'll need to ensure we have parentheses correctly.

Let's draft:

root = Card([header, shipmentsTable, delayedCallout, onTimeBadge, volumeChart, searchForm, avgCostBadge, weeklyChart, flagButton, refreshedCallout])

Now define each variable before use.

Define header:

header = CardHeader("Logistics Coordinator Board", "Key metrics and shipments")

Define columns:

originCol = Col("Origin", ["NYC", "LA", "Chicago"], "string")
destCol = Col("Destination", ["Chicago", "NYC", "Denver"], "string")
etaCol = Col("ETA", ["2025-10-01", "2025-10-03", "2025-09-28"], "string")
statusCol = Col("Status", ["In Transit", "In Transit", "Delayed"], "string")

Define shipmentsTable:

shipmentsTable = Table(columns: [originCol, destCol, etaCol, statusCol])

Define delayedCallout:

delayedCallout = Callout(variant: "warning", title: "Delayed Shipments", description: "3 shipments delayed")

Define onTimeBadge:

onTimeBadge = Badge("85%", "success")

Define volumeSeries:

volumeSeries = Series("Volume", [120, 80, 150])

Define volumeChart:

volumeChart = HorizontalBarChart(labels: ["Carrier A", "Carrier B", "Carrier C"], series: [volumeSeries], variant: "grouped", xLabel: "Volume", yLabel: "Carrier")

Define searchInput:

searchInput = Input("route", "Search route", "text")

Define searchControl:

searchControl = FormControl("Route", searchInput)

Define searchBtn:

searchBtn = Button("Search", null, "primary")

Define searchButtons:

searchButtons = Buttons([searchBtn])

Define searchForm:

searchForm = Form("route-search", searchButtons, [searchControl])

Define avgCostBadge:

avgCostBadge = Badge("$45", "success")

Define weeklySeries:

weeklySeries = Series("Volume", [30,45,50,40,60,55,70,80])

Define weeklyChart:

weeklyChart = LineChart(labels: ["W1","W2","W3","W4","W5","W6","W7","W8"], series: [weeklySeries], variant: "natural", xLabel: "Week", yLabel: "Shipments")

Define flagButton:

flagButton = Button("Flag shipment", null, "primary")

Define refreshedCallout:

refreshedCallout = TextCallout(variant: "neutral", title: "Data Refreshed", description: "Last refreshed: 2025-09-20 14:30 UTC")

Now verify each variable is referenced in root children list.

Root children list includes: header, shipmentsTable, delayedCallout, onTimeBadge, volumeChart, searchForm, avgCostBadge, weeklyChart, flagButton, refreshedCallout.

Check each:

- header referenced - yes.

- shipmentsTable referenced - yes. Its columns are referenced inside definition, but they are defined and referenced within shipmentsTable, which is referenced in root. So columns are referenced.

- delayedCallout referenced - yes.

- onTimeBadge referenced - yes.

- volumeChart referenced - yes. Its series variable referenced.

- searchForm referenced - yes. Its fields, buttons referenced.

- avgCostBadge referenced - yes.

- weeklyChart referenced - yes. Its series variable referenced.

- flagButton referenced - yes.

- refreshedCallout referenced - yes.

Now ensure that all defined variables are referenced by at least one other variable (except root). Let's see:

- header: referenced by root.

- originCol, destCol, etaCol, statusCol: referenced by shipmentsTable, which is referenced in root. So they are referenced.

- shipmentsTable referenced by root.

- delayedCallout referenced by root.

- onTimeBadge referenced by root.

- volumeSeries referenced by volumeChart, which is referenced by root.

- volumeChart referenced by root.

- searchInput referenced by searchControl, which is referenced by searchForm, which is referenced by root. So searchInput is referenced.

- searchControl referenced by searchForm.

- searchBtn referenced by searchButtons, which is referenced by searchForm.

- searchButtons referenced by searchForm.

- avgCostBadge referenced by root.

- weeklySeries referenced by weeklyChart, which is referenced by root.

- weeklyChart referenced by root.

- flagButton referenced by root.

- refreshedCallout referenced by root.

Now check that we used correct types for arrays etc.

Col data arrays: we used strings, okay.

Series data arrays: numbers, okay.

Now ensure we didn't use any named arguments. All arguments are positional.

Check each component call:

CardHeader("Logistics Coordinator Board", "Key metrics and shipments") – two positional args.

Col("Origin", ["NYC", "LA", "Chicago"], "string") – three positional args.

Table(columns: [originCol, destCol, etaCol, statusCol]) – note that we used named argument "columns:" which is not allowed! Wait rule: "Arguments are POSITIONAL (order matters, not names). Write SomeComp([children], "row", "l") NOT SomeComp([children], direction: "row", gap: "l") — colon syntax is NOT supported". So we cannot use named arguments like columns:. Must provide positional argument list only. But the signature for Table is `Table(columns: (Col)[])`. The colon indicates a named argument, but rule says not allowed. However the signature itself uses colon; but the rule says arguments are positional. How to interpret? The signature indicates parameter name, but we must supply arguments positionally, not using colon. But the signature shows `columns:` as the parameter name. In examples, they show `Card(children: (TextContent | ...)[], variant?: ...)` but they say arguments are positional. Actually they say "Arguments are POSITIONAL (order matters, not names). Write SomeComp([children], "row", "l") NOT SomeComp([children], direction: "row", gap: "l") — colon syntax is NOT supported". So you cannot write `Table(columns: [...])` because that's using a named argument (the colon). Instead you must write `Table([...])`? But the signature expects columns as first argument. So we need to call Table with a list of columns as the first argument, without naming it. So we should write `Table([originCol, destCol, etaCol, statusCol])`. However the signature shows `columns:` maybe it's just describing the parameter, not requiring the colon in the call. In examples: `Card(children: (TextContent | ...)[], variant?: ...)` they show colon but rule says not allowed. So maybe they show signature with colon for readability but actual call must be positional. So for Table we need `Table([originCol, destCol, etaCol, statusCol])`. Let's adjust.

Similarly for other component calls that have named arguments in signature (like Form(name: ..., buttons: ..., fields: ...)). We must supply arguments positionally: first argument is name, second is buttons, third is fields. So we must write `Form("route-search", searchButtons, [searchControl])`. That's okay, no colon.

For Callout: signature `Callout(variant: "info" | "warning" | "error" | "success" | "neutral", title: string, description: string)`. So we must supply variant, title, description as positional arguments in order: variant, title, description. So we need `Callout("warning", "Delayed Shipments", "3 shipments delayed")`. But variant expects a string from the set. So we need to pass "warning" as string, not the enum name? The signature says variant: "info" | "warning"... So the argument must be the string "warning". So we should write `Callout("warning", "Delayed Shipments", "3 shipments delayed")`. However they said enum-typed arguments accept ONLY the listed values, exactly as written; never invent variants. The listed values are "info", "warning", "error", "success", "neutral". So we must use "warning" exactly. So we need to pass "warning" as string (including quotes). That's okay.

Similarly for Badge: `Badge(text: string, variant?: ...)`. So we need `Badge("85%", "success")`. Good.

For HorizontalBarChart: signature `HorizontalBarChart(labels: (string | number)[], series: (Series)[], variant?: "grouped" | "stacked", xLabel?: string, yLabel?: string)`. So arguments order: labels, series, variant, xLabel, yLabel. So we need `HorizontalBarChart(["Carrier A","Carrier B","Carrier C"], [Series("Volume", [120,80,150])], "grouped", "Volume", "Carrier")`. Wait series expects a Series object; we need to pass Series("Volume", [120,80,150]) as a Series. So the series argument is a Series object, not an array of Series? The signature says series: (Series)[], i.e., array of Series. So we need to wrap the Series in an array: [Series("Volume", [120,80,150])]. So we need to write `[Series("Volume", [120,80,150])]`. And labels is array of strings. So we need `["Carrier A","Carrier B","Carrier C"]`. So the call: `HorizontalBarChart(["Carrier A","Carrier B","Carrier C"], [Series("Volume", [120,80,150])], "grouped", "Volume", "Carrier")`. Check order: labels, series, variant, xLabel, yLabel. Yes.

For LineChart: signature `LineChart(labels: (string | number)[], series: (Series)[], variant?: "linear" | "natural" | "step", xLabel?: string, yLabel?: string)`. So we need `LineChart(["W1","W2","W3","W4","W5","W6","W7","W8"], [Series("Volume", [30,45,50,40,60,55,70,80])], "natural", "Week", "Shipments")`.

For Form: `Form("route-search", searchButtons, [searchControl])`. That's correct.

For Buttons: `Buttons([searchBtn])` – direction optional, we can omit.

For Button: `Button("Search", null, "primary")` – action null, variant primary.

For Series: `Series("Volume", [120,80,150])` – correct.

For Col: `Col("Origin", ["NYC","LA","Chicago"], "string")` – correct.

For Table: `Table([originCol, destCol, etaCol, statusCol])` – correct.

For CardHeader: `CardHeader("Logistics Coordinator Board", "Key metrics and shipments")` – correct.

For Callout: `Callout("warning", "Delayed Shipments", "3 shipments delayed")` – correct.

For Badge: `Badge("85%", "success")` – correct.

For TextCallout: `TextCallout(variant: "neutral", title: "Data Refreshed", description: "Last refreshed: 2025-09-20 14:30 UTC")` – need positional: variant, title, description. So `TextCallout("neutral", "Data Refreshed", "Last refreshed: 2025-09-20 14:30 UTC")`.

Now we need to ensure we didn't use any named arguments besides those required (the colon). In our definitions we used named arguments for variables (like `originCol = Col(...)`) that's fine because that's assignment, not component call. In component calls we must avoid colon. Let's verify each component call:

- header = CardHeader("Logistics Coordinator Board", "Key metrics and shipments") – ok.

- originCol = Col("Origin", ["NYC", "LA", "Chicago"], "string") – ok.

- destCol = Col("Destination", ["Chicago", "NYC", "Denver"], "string") – ok.

- etaCol = Col("ETA", ["2025-10-01", "2025-10-03", "2025-09-28"], "string") – ok.

- statusCol = Col("Status", ["In Transit", "In Transit", "Delayed"], "string") – ok.

- shipmentsTable = Table([originCol, destCol, etaCol, statusCol]) – no colon, just list.

- delayedCallout = Callout("warning", "Delayed Shipments", "3 shipments delayed") – ok.

- onTimeBadge = Badge("85%", "success") – ok.

- volumeSeries = Series("Volume", [120, 80, 150]) – ok.

- volumeChart = HorizontalBarChart(["Carrier A","Carrier B","Carrier C"], [Series("Volume", [120,80,150])], "grouped", "Volume", "Carrier") – ok.

- searchInput = Input("route", "Search route", "text") – ok.

- searchControl = FormControl("Route", searchInput) – ok.

- searchBtn = Button("Search", null, "primary") – ok.

- searchButtons = Buttons([searchBtn]) – ok.

- searchForm = Form("route-search", searchButtons, [searchControl]) – ok.

- avgCostBadge = Badge("$45", "success") – ok.

- weeklySeries = Series("Volume", [30,45,50,40,60,55,70,80]) – ok.

- weeklyChart = LineChart(["W1","W2","W3","W4","W5","W6","W7","W8"], [Series("Volume", [30,45,50,40,60,55,70,80])], "natural", "Week", "Shipments") – ok.

- flagButton = Button("Flag shipment", null, "primary") – ok.

- refreshedCallout = TextCallout("neutral", "Data Refreshed", "Last refreshed: 2025-09-20 14:30 UTC") – ok.

Now root = Card([...]) – need to list children in order.

We need to ensure that each child is a component instance, not a variable. So we need to include header, shipmentsTable, delayedCallout, onTimeBadge, volumeChart, searchForm, avgCostBadge, weeklyChart, flagButton, refreshedCallout.

Check that all those are defined.

Now ensure that we didn't miss any required items:

1. shipments in transit with origin, destination, ETA and status for each – Table covers.

2. delayed shipments called out – Callout.

3. on-time percentage this month – Badge.

4. volume split by carrier – HorizontalBarChart.

5. a way to search by route – Form with Input.

6. average cost per shipment – Badge.

7. weekly volume across past two months – LineChart.

8. a way to flag a shipment – Button.

9. when numbers were last refreshed – TextCallout.

All covered.

Now ensure that we used correct variant values and enum lists.

Check variant for Callout: "warning" is allowed.

Badge variant "success" allowed.

HorizontalBarChart variant "grouped" allowed.

LineChart variant "natural" allowed.

Button variant "primary" allowed.

TextCallout variant "neutral" allowed.

Now check that we used correct types for arrays etc.

Now ensure that root children list is a complete commitment: every defined variable must be reachable from root. Let's verify:

- header referenced in root.

- shipmentsTable referenced in root.

- delayedCallout referenced in root.

- onTimeBadge referenced in root.

- volumeChart referenced in root.

- searchForm referenced in root.

- avgCostBadge referenced in root.

- weeklyChart referenced in root.

- flagButton referenced in root.

- refreshedCallout referenced in root.

All good.

Now ensure that we didn't define any variable that is not referenced. Let's see:

- originCol, destCol, etaCol, statusCol are referenced inside shipmentsTable, which is referenced in root. So they are referenced.

- volumeSeries referenced in volumeChart, which is referenced.

- weeklySeries referenced in weeklyChart, which is referenced.

- searchInput referenced in searchControl, which is referenced in searchForm, which is referenced.

- searchControl referenced in searchForm.

- searchBtn referenced in searchButtons, which is referenced in searchForm.

- avgCostBadge referenced directly.

- flagButton referenced directly.

All good.

Now ensure that the root children list includes all components in reading order. The order we propose is:

root = Card([header, shipmentsTable, delayedCallout, onTimeBadge, volumeChart, searchForm, avgCostBadge, weeklyChart, flagButton, refreshedCallout])

But maybe we want the search form earlier or later. The reading order should be logical. Let's think: Typically you'd see header, then shipments table, then delayed callout, then on-time badge, then volume chart, then search form, then average cost badge, then weekly chart, then flag button, then refreshed callout. That seems okay.

Now ensure that we didn't forget any component like a separator or something. Not needed.

Now ensure that we didn't use any named arguments inside component calls. Let's double-check each component call line:

- CardHeader("Logistics Coordinator Board", "Key metrics and shipments") – two positional args.

- Col("Origin", ["NYC", "LA", "Chicago"], "string") – three positional args.

- Table([originCol, destCol, etaCol, statusCol]) – list of 4 items, positional.

- Callout("warning", "Delayed Shipments", "3 shipments delayed") – three positional args.

- Badge("85%", "success") – two positional args.

- Series("Volume", [120, 80, 150]) – two positional args.

- HorizontalBarChart(["Carrier A","Carrier B","Carrier C"], [Series("Volume", [120,80,150])], "grouped", "Volume", "Carrier") – five positional args.

- Input("route", "Search route", "text>