Andrew Aquino baed1455cf feat(site/src/pages/TemplateBuilder): scroll to module when clicking sidebar row (#27351)
## What

Clicking a selected module in the right-hand `SelectionSummary` sidebar
now jumps to the module settings step and scrolls that module's card
into view.

Addresses [DEVEX-587](https://linear.app/codercom/issue/DEVEX-587). This
is an isolated slice of #27077 (which bundles several unrelated
changes); only the "click a module to scroll to it" behavior is included
here.

## Changes

- `SelectionSummary`: gains an optional `onNavigateModule` prop. When
provided, each selected module row renders as an accessible `<button>`
(hover + focus-ring) labeled `Configure <name>`; otherwise rows stay
non-interactive.
- `ModuleSettingsStep`: each module card wrapper gets a stable
`id={module-config-<id>}` scroll anchor plus `scroll-mt-24` so the
sticky top nav does not cover the title.
- `TemplateBuilderPageView`: adds `navigateToModule`, which switches to
the module settings step and scrolls the target module into view once it
renders. If the module settings step is skipped (no configurable
variables), the click is a no-op.
- `SelectionSummary.stories`: adds a `NavigateModuleClick` interaction
story and updates `WithLongNameModule` to the new button semantics.

## Explicitly out of scope

The rest of #27077 is not included: gallery height/card clamp,
sensitive-var banner relocation, trash-icon removal wiring, the
scroll-past required-field highlight subsystem, and the broader
navigable-sidebar work (step labels, base-row navigation, back-stack
semantics).

## Testing

- `pnpm check` (biome) clean
- `pnpm lint:types` (tsc) clean
- `pnpm vitest run --project=unit src/pages/TemplateBuilder` — 46 pass
- `pnpm vitest run --project=storybook src/pages/TemplateBuilder` — 34
pass (incl. new `NavigateModuleClick`)

<details>
<summary>Implementation plan / decision log</summary>

### Goal

Open a new PR containing only the changes that satisfy DEVEX-587:
clicking a selected module in the right-hand `SelectionSummary` sidebar
should jump to the module settings step and scroll that module's card
into view.

### Base has moved since #27077

PR #27077 was cut against an older `main`. Today's `main` was
refactored:

- Steps are URL-driven; `steps.ts` already provides `StepId`, per-step
`group` (1/2/3), and `nearestVisible()`.
- `TemplateBuilderPageView` already has `navigateToStep(index: number)`
and a `useEffect` that resets window scroll on every `currentStep.id`
change.
- The sidebar no longer has a deselect ("X") button. The PR's
entanglement between "make row a nav button" and "move deselect to a
trash icon" therefore does not exist on current `main`, so module
navigation can be added without removing behavior and without pulling in
the trash-icon item.

So the isolated diff was written against current `main`, not reused
verbatim from the PR. It is smaller than the PR's own hunks and does not
include `maxReachedStep`, step-label navigation, or base-row navigation.

### Decisions

- Scope for this PR: module-row navigation only.
- Skipped-settings fallback: no-op. When no selected module exposes
configurable variables, the `module-settings` step is skipped and
clicking a module row does nothing (there is no card to scroll to).

### Scroll timing

`navigateToStep` triggers a window scroll reset via an existing effect
keyed on `currentStep.id`. To cooperate, `navigateToModule` stores the
target module id in a ref and a follow-up effect (declared after the
scroll-reset effect, so it runs second) calls `scrollIntoView` inside
`requestAnimationFrame` once `module-settings` has rendered. When
already on `module-settings`, it scrolls immediately.

### Follow-up (deferred): full navigable sidebar

Not part of this PR, documented for later. The remainder of #27077's
item #2, rebased onto current `main`:

- `onNavigateStep?: (stepId: StepId) => void` on `SelectionSummary`.
- Clickable step labels: `Base Template` -> `base-infra`, `Modules` ->
`module-select`, `Customizations` -> `customizations`.
- Clickable selected base-template row -> `base-parameters` (fall back
to `base-infra` when that step is skipped for the chosen base).
- Back-stack semantics via a `maxReachedStep` prop so steps at or below
the furthest-reached group stay `complete` and clickable even after
navigating backward, while strictly-higher groups render as inert
`upcoming`.
- `StepIndicator` and `BaseTemplateSelection` render as `<button>` when
a navigation handler is supplied, else stay inert.
- Stories: `NavigationClicks`, `BackwardNavigation`, and
`UpcomingStepsInert`.

</details>

---

Coder Agents generated, on behalf of @aqandrew.
2026-08-06 08:26:49 -07:00
2022-04-04 11:55:06 -05:00

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