feat: bulk delete, team dispatch, calendar views, timeline colors

- Multi-select bulk delete in all 5 list views (Artefacts, Posts, Tasks,
  Issues, Assets) with cascade deletes and confirmation modals
- Team-based issue dispatch: team picker on public issue form, team filter
  on Issues page, copy public link from Team page and Issues header,
  team assignment in IssueDetailPanel
- Month/Week toggle on PostCalendar and TaskCalendarView
- Month/Week/Day zoom on project and campaign timelines (InteractiveTimeline)
  and ProjectDetail GanttView, with Month as default
- Custom timeline bar colors: clickable color dot with 12-color palette
  popover on project, campaign, and task timeline bars
- Artefacts default view changed to list
- BulkSelectBar reusable component
- i18n keys for all new features (en + ar)

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

client/src/pages/Login.jsx

@@ -34,7 +34,7 @@ export default function Login() {
       await login(email, password)
       navigate('/')
     } catch (err) {
-      setError(err.message || 'Invalid email or password')
+      setError(err.message || t('login.invalidCredentials'))
     } finally {
       setLoading(false)
     }
@@ -44,7 +44,7 @@ export default function Login() {
     e.preventDefault()
     setError('')
     if (setupPassword !== setupConfirm) {
-      setError('Passwords do not match')
+      setError(t('login.passwordMismatch'))
       return
     }
     setLoading(true)
@@ -55,7 +55,7 @@ export default function Login() {
       setNeedsSetup(false)
       setEmail(setupEmail)
     } catch (err) {
-      setError(err.message || 'Setup failed')
+      setError(err.message || t('login.setupFailed'))
     } finally {
       setLoading(false)
     }
@@ -78,10 +78,10 @@ export default function Login() {
             <Megaphone className="w-8 h-8 text-white" />
           </div>
           <h1 className="text-3xl font-bold text-white mb-2">
-            {needsSetup ? 'Initial Setup' : t('login.title')}
+            {needsSetup ? t('login.initialSetup') : t('login.title')}
           </h1>
           <p className="text-slate-400">
-            {needsSetup ? 'Create your superadmin account to get started' : t('login.subtitle')}
+            {needsSetup ? t('login.initialSetupDesc') : t('login.subtitle')}
           </p>
         </div>
 
@@ -89,7 +89,7 @@ export default function Login() {
         {setupDone && (
           <div className="flex items-center gap-2 p-3 mb-4 bg-green-500/10 border border-green-500/30 rounded-lg">
             <CheckCircle className="w-5 h-5 text-green-400 shrink-0" />
-            <p className="text-sm text-green-400">Account created. You can now log in.</p>
+            <p className="text-sm text-green-400">{t('login.accountCreated')}</p>
           </div>
         )}
 
@@ -99,7 +99,7 @@ export default function Login() {
             <form onSubmit={handleSetup} className="space-y-5">
               {/* Name */}
               <div>
-                <label className="block text-sm font-medium text-slate-300 mb-2">Name</label>
+                <label className="block text-sm font-medium text-slate-300 mb-2">{t('login.fullName')}</label>
                 <div className="relative">
                   <User className="absolute left-3 top-1/2 -translate-y-1/2 w-5 h-5 text-slate-500" />
                   <input
@@ -107,7 +107,7 @@ export default function Login() {
                     value={setupName}
                     onChange={(e) => setSetupName(e.target.value)}
                     className="w-full pl-11 pr-4 py-3 bg-slate-900/50 border border-slate-700 rounded-lg text-white placeholder-slate-500 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent transition-all"
-                    placeholder="Your name"
+                    placeholder={t('login.fullNamePlaceholder')}
                     required
                     autoFocus
                   />
@@ -116,7 +116,7 @@ export default function Login() {
 
               {/* Email */}
               <div>
-                <label className="block text-sm font-medium text-slate-300 mb-2">Email</label>
+                <label className="block text-sm font-medium text-slate-300 mb-2">{t('login.email')}</label>
                 <div className="relative">
                   <Mail className="absolute left-3 top-1/2 -translate-y-1/2 w-5 h-5 text-slate-500" />
                   <input
@@ -133,7 +133,7 @@ export default function Login() {
 
               {/* Password */}
               <div>
-                <label className="block text-sm font-medium text-slate-300 mb-2">Password</label>
+                <label className="block text-sm font-medium text-slate-300 mb-2">{t('login.password')}</label>
                 <div className="relative">
                   <Lock className="absolute left-3 top-1/2 -translate-y-1/2 w-5 h-5 text-slate-500" />
                   <input
@@ -141,7 +141,7 @@ export default function Login() {
                     value={setupPassword}
                     onChange={(e) => setSetupPassword(e.target.value)}
                     className="w-full pl-11 pr-4 py-3 bg-slate-900/50 border border-slate-700 rounded-lg text-white placeholder-slate-500 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent transition-all"
-                    placeholder="Choose a strong password"
+                    placeholder={t('login.passwordPlaceholder')}
                     required
                     minLength={6}
                   />
@@ -150,7 +150,7 @@ export default function Login() {
 
               {/* Confirm Password */}
               <div>
-                <label className="block text-sm font-medium text-slate-300 mb-2">Confirm Password</label>
+                <label className="block text-sm font-medium text-slate-300 mb-2">{t('login.confirmPassword')}</label>
                 <div className="relative">
                   <Lock className="absolute left-3 top-1/2 -translate-y-1/2 w-5 h-5 text-slate-500" />
                   <input
@@ -158,7 +158,7 @@ export default function Login() {
                     value={setupConfirm}
                     onChange={(e) => setSetupConfirm(e.target.value)}
                     className="w-full pl-11 pr-4 py-3 bg-slate-900/50 border border-slate-700 rounded-lg text-white placeholder-slate-500 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent transition-all"
-                    placeholder="Re-enter your password"
+                    placeholder={t('login.confirmPasswordPlaceholder')}
                     required
                     minLength={6}
                   />
@@ -182,10 +182,10 @@ export default function Login() {
                 {loading ? (
                   <span className="flex items-center justify-center gap-2">
                     <div className="w-5 h-5 border-2 border-white/30 border-t-white rounded-full animate-spin" />
-                    Creating account...
+                    {t('login.creatingAccount')}
                   </span>
                 ) : (
-                  'Create Superadmin Account'
+                  t('login.createAccount')
                 )}
               </button>
             </form>