Sprint: Verbeteren debug mode (#179)

* feat(PBI-49): add debugProps helper + Vitest test

Adds lib/debug.ts with debugProps(id, component, file) that returns
data-debug-id and data-debug-label attrs in dev mode, empty object in
production. Adds __tests__/lib/debug.test.ts covering both modes.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* docs(PBI-49): add debug-id pattern doc + CLAUDE.md reference

Adds docs/patterns/debug-id.md documenting the named-component boundary
rule (6 punten), helper-voorbeeld, skip-criteria en motivatie voor
handmatige pad-argumenten. Voegt verwijzing toe aan CLAUDE.md
patterns-tabel.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* refactor(PBI-49): migrate 17 shared/ components to debugProps helper

Replace hardcoded data-debug-id + data-debug-label attribute pairs with
{...debugProps(id, component, file)} spread in all 17 components/shared/
files. Existing debug-ids preserved unchanged.

* feat(PBI-49): add debugProps to backlog/, sprint/, solo/ components

* feat(PBI-49): add debugProps to jobs/ + ideas/ components

* feat(PBI-49): add debugProps to products/ + settings/ + notifications/ components

* feat(PBI-49): add debugProps to admin/ + dashboard/ + dialogs/ + mobile/ + split-pane/

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(PBI-49): use attr(data-debug-id) for debug tooltip in globals.css

* refactor(PBI-49): remove data-debug-label from debugProps helper + test

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* refactor(PBI-49): strip unused component/file args from debugProps in shared/

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(PBI-49): add BEM sub-element data-debug-id to StatusBar, NavBar, PanelNavBar

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(PBI-49): add BEM sub-element data-debug-id to components/sprint/*

- new-sprint-dialog: __submit on submit button
- sprint-backlog: __list on SprintBacklogLeft + SprintBacklogRight scroll areas
- sprint-board-client: root wrapper div (display:contents) + __drag-overlay
- sprint-header: __title on goal button, __dates on dates button, __actions on action cluster
- sprint-run-controls: root on controls div, __start/__cancel on action buttons; __blockers-dialog on dialog content
- start-sprint-button: root on trigger button, __dialog on dialog content, __submit on submit button
- sync-active-sprint-cookie: no debug-id (returns null, side-effect only), comment added

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(PBI-49): add BEM sub-element data-debug-id to components/backlog/*

* feat(PBI-49): add BEM sub-element data-debug-id to components/ideas/*

* feat(PBI-49): add BEM sub-element data-debug-id to components/dashboard/* + components/markdown.tsx

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(PBI-49): add BEM sub-element data-debug-id to new-product-button

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(PBI-49): add BEM sub-element data-debug-id to components/solo/*

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(PBI-49): add BEM sub-elements to nav-status-indicators

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(PBI-49): add BEM sub-element data-debug-id to components/jobs/*

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(PBI-49): add BEM sub-element data-debug-id to components/products/*

* feat(PBI-49): add BEM sub-element data-debug-id to components/notifications/*

- answer-modal: __content (scroll area), __submit (footer)
- notifications-bridge: skip comment (bridge, non-rendering wrapper)
- notifications-realtime-mount: skip comment (returns null)
- notifications-sheet: __header, __items (questions list)
- push-toggle: __switch (button), __label (button text) on subscribed/unsubscribed states

* feat(PBI-49): add BEM sub-element data-debug-id to components/settings/*

- leave-product-button: root only (single-button component)
- min-quota-editor: __input (number input), __save (save button)
- profile-editor: __username (bio/short-description input), __save (submit)
- role-manager: __roles (checkbox list), __add (save button)
- token-manager: __tokens (active tokens list), __generate (create button)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(PBI-49): add BEM sub-element data-debug-id to admin, auth, dialogs, entity-dialog, mobile, split-pane

* docs(PBI-49): add debug-labels BEM pattern doc + CLAUDE.md entry

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

components/sprint/sprint-header.tsx

@@ -32,6 +32,7 @@ import {
 } from '@/components/shared/entity-dialog-layout'
 import { updateSprintGoalAction, updateSprintDatesAction, completeSprintAction, setAllSprintTasksDoneAction } from '@/actions/sprints'
 import type { SprintStory } from './sprint-backlog'
+import { debugProps } from '@/lib/debug'
 
 interface Sprint {
   id: string
@@ -130,7 +131,7 @@ export function SprintHeader({ productId: _productId, productName, sprint, isDem
   }
 
   return (
-    <div className="px-4 py-3 border-b border-border bg-surface-container-low shrink-0">
+    <div className="px-4 py-3 border-b border-border bg-surface-container-low shrink-0" {...debugProps('sprint-header', 'SprintHeader', 'components/sprint/sprint-header.tsx')}>
       <div className="flex items-center justify-between gap-4">
         <div className="min-w-0 flex-1">
           <div className="flex items-center gap-2">
@@ -153,7 +154,7 @@ export function SprintHeader({ productId: _productId, productName, sprint, isDem
               </div>
             </form>
           ) : (
-            <button onClick={() => !isDemo && setEditingGoal(true)} className="text-left mt-0.5 group">
+            <button onClick={() => !isDemo && setEditingGoal(true)} className="text-left mt-0.5 group" data-debug-id="sprint-header__title">
               <p className="text-sm font-medium text-foreground group-hover:text-primary transition-colors">
                 {sprint.sprint_goal}
               </p>
@@ -161,9 +162,9 @@ export function SprintHeader({ productId: _productId, productName, sprint, isDem
           )}
         </div>
 
-        <div className="flex items-center gap-2 shrink-0">
+        <div className="flex items-center gap-2 shrink-0" data-debug-id="sprint-header__actions">
           <DemoTooltip show={isDemo}>
-            <Button size="sm" variant="ghost" disabled={isDemo} className="text-muted-foreground" onClick={() => !isDemo && setEditingDates(true)}>
+            <Button size="sm" variant="ghost" disabled={isDemo} className="text-muted-foreground" data-debug-id="sprint-header__dates" onClick={() => !isDemo && setEditingDates(true)}>
               {sprint.start_date && sprint.end_date
                 ? `${toDateInputValue(sprint.start_date)} → ${toDateInputValue(sprint.end_date)}`
                 : 'Datums instellen'}