i18n: extract things, history, projects, labels, filters, timer and points

Part of #145.

Fourteen files across seven feature areas that had no namespace yet: the
things create/edit modals and their history, the chore history detail and
edit modals, the activity feed, the points view and its redemption modal,
the project view with its selector and icon picker, the label view, the
advanced filter builder and the timer edit modal.

Seven new namespaces registered in `src/i18n/config.js` in one change
rather than one per PR, so the `ns:` array is touched once and my other
extraction PRs cannot conflict with this one. Namespaces stay
feature-scoped as described in #145; if you'd rather fold any of these
into `common` or `chores`, say which and I'll rework it.

Dictionaries: `history` 57 keys, `points` 50, `timer` 25, `projects` 16,
`things` 14, `filters` 13, `labels` 5.

English only — no translations, no behaviour change. Every t() value is
checked against this branch's base: the string must appear
character-for-character in the code it replaces (226 call sites).

Three values in `UserPoints` are matched loosely and worth naming. The
base builds the leaderboard heading and subtitle around a ternary —
`{mode === 'points' ? 'Points' : 'Tasks'} Leaderboard` and `Rankings based
on {…} during the selected time period` — so neither full sentence exists
contiguously in the source. Each key holds exactly what one branch
renders. The sentences are kept whole rather than split around the
ternary, since a sentence assembled from fragments cannot be reordered by
a translator.

src/views/Projects/ProjectView.jsx

@@ -11,6 +11,7 @@ import {
   Typography,
 } from '@mui/joy'
 import { useEffect, useState } from 'react'
+import { useTranslation } from 'react-i18next'
 import { useNavigate } from 'react-router-dom'
 import ProjectModal from '../Modals/Inputs/ProjectModal'
 
@@ -40,6 +41,7 @@ const ProjectCardContent = ({
   onCardClick,
   onToggleActions,
 }) => {
+  const { t } = useTranslation('projects')
   // Check if current user owns this project
   const isOwnedByCurrentUser = project.created_by === currentUserId
   const isDefaultProject = project.id === 'default'
@@ -144,7 +146,7 @@ const ProjectCardContent = ({
                 fontWeight: 'md',
               }}
             >
-              Default
+              {t('defaultChip')}
             </Chip>
           )}
         </Typography>
@@ -178,7 +180,7 @@ const ProjectCardContent = ({
               color: 'primary.500',
             }}
           >
-            {taskCount} tasks
+            {t('tasks', { count: taskCount })}
           </Chip>
 
           {!isOwnedByCurrentUser && !isDefaultProject && (
@@ -193,7 +195,7 @@ const ProjectCardContent = ({
                 fontWeight: 'md',
               }}
             >
-              Shared
+              {t('shared')}
             </Chip>
           )}
         </Box>
@@ -218,6 +220,7 @@ const ProjectCardContent = ({
 }
 
 const ProjectView = () => {
+  const { t } = useTranslation('projects')
   const { data: projects, isProjectsLoading, isError } = useProjects()
   const { data: userProfile } = useUserProfile()
   const { data: chores = { res: [] } } = useChores(false) // false to exclude archived
@@ -250,11 +253,11 @@ const ProjectView = () => {
     const project = userProjects.find(p => p.id === id)
     setConfirmationModel({
       isOpen: true,
-      title: 'Delete Project',
-      message: `Are you sure you want to delete "${project?.name}"? This will remove the project but keep all tasks (they'll move to the Default Project).`,
-      confirmText: 'Delete',
+      title: t('delete.title'),
+      message: t('delete.message', { name: project?.name }),
+      confirmText: t('common:delete'),
       color: 'danger',
-      cancelText: 'Cancel',
+      cancelText: t('common:cancel'),
       onClose: confirmed => {
         if (confirmed === true) {
           handleDeleteProject(id)
@@ -347,7 +350,7 @@ const ProjectView = () => {
   if (isError) {
     return (
       <Typography color='danger' textAlign='center'>
-        Failed to load projects. Please try again.
+        {t('loadError')}
       </Typography>
     )
   }
@@ -360,11 +363,10 @@ const ProjectView = () => {
             level='h3'
             sx={{ fontWeight: 'lg', color: 'text.primary' }}
           >
-            Projects
+            {t('common:navigation.projects')}
           </Typography>
           <Typography level='body-sm' sx={{ color: 'text.secondary' }}>
-            Organize your tasks into projects. Create custom workspaces to keep
-            your tasks organized and easily accessible.
+            {t('blurb')}
           </Typography>
         </Stack>
       </Box>
@@ -378,8 +380,8 @@ const ProjectView = () => {
         <ProjectCardContent
           project={{
             id: 'default',
-            name: 'Default Project',
-            description: 'All tasks without a specific project',
+            name: t('chores:toolbar.defaultProject'),
+            description: t('defaultDescription'),
             icon: 'FolderOpen',
             color: '#1976d2',
             created_by: userProfile?.id,
@@ -389,7 +391,7 @@ const ProjectView = () => {
           onCardClick={() =>
             handleCardClick({
               id: 'default',
-              name: 'Default Project',
+              name: t('chores:toolbar.defaultProject'),
               icon: 'FolderOpen',
               color: '#1976d2',
             })
@@ -429,7 +431,7 @@ const ProjectView = () => {
                       >
                         <EditIcon sx={{ fontSize: 20 }} />
                         <Typography level='body-xs' sx={{ mt: 0.5 }}>
-                          Edit
+                          {t('common:edit')}
                         </Typography>
                       </Box>
                     </SwipeAction>
@@ -450,7 +452,7 @@ const ProjectView = () => {
                       >
                         <DeleteIcon sx={{ fontSize: 20 }} />
                         <Typography level='body-xs' sx={{ mt: 0.5 }}>
-                          Delete
+                          {t('common:delete')}
                         </Typography>
                       </Box>
                     </SwipeAction>