feat: comprehensive UI overhaul + budget allocation redesign

Audit & Quality:
- RTL: replaced 121 LTR-only utilities (text-left, pl-, left-) with logical properties
- A11y: focus traps + ARIA on Modal/SlidePanel/TabbedModal, clickable divs→buttons
- Theming: bg-white→bg-surface (170 instances), text-gray→semantic tokens
- Performance: useMemo on filters, loading="lazy" on 24 images
- CSS: prefers-reduced-motion, removed dead animations

Component Splits:
- PostDetailPanel: 1332→623 lines + 4 sub-components
- ArtefactDetailPanel: 972→590 lines + 1 sub-component

Brand Identity — Rawaj (رواج):
- New name, DM Sans font, deep teal palette (#0d9488)
- Custom SVG logo, forest-tinted dark mode
- All emails branded with app name in subject line

Design Refinement:
- Dashboard: merged posts+deadlines into tabbed ActivityFeed, inline stats
- Quieter: removed card lift, brand glow, gradient text, mesh backgrounds
- CampaignDetail: prominent budget card, compact team avatars, Lucide icons
- Consistent page titles via Header.jsx, standardized section headers
- Finance page fully i18n'd (20+ hardcoded strings replaced)

Budget Allocation Redesign:
- Single source of truth: BudgetEntries (Campaign.budget deprecated)
- Validation at all levels: main→campaign→track, expenses blocked if insufficient
- Budget request workflow with CEO approval via public link
- BudgetRequests table, CRUD routes, public approval page
- Budget mutex for race condition prevention
- Idempotent migration for existing campaign budgets

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

client/src/i18n/en.json

@@ -1,6 +1,6 @@
 {
-  "app.name": "Digital Hub",
-  "app.subtitle": "Platform",
+  "app.name": "Rawaj",
+  "app.subtitle": "Marketing Hub",
   "nav.dashboard": "Dashboard",
   "nav.campaigns": "Campaigns",
   "nav.finance": "Finance & ROI",
@@ -70,7 +70,7 @@
   "dashboard.noPostsYet": "No posts yet. Create your first post!",
   "dashboard.upcomingDeadlines": "Upcoming Deadlines",
   "dashboard.noUpcomingDeadlines": "No upcoming deadlines this week. 🎉",
-  "dashboard.loadingHub": "Loading Digital Hub...",
+  "dashboard.loadingHub": "Loading Rawaj...",
   "posts.title": "Post Production",
   "posts.newPost": "New Post",
   "posts.editPost": "Edit Post",
@@ -271,7 +271,7 @@
   "settings.english": "English",
   "settings.arabic": "Arabic",
   "settings.restartTutorial": "Restart Tutorial",
-  "settings.tutorialDesc": "Need a refresher? Restart the interactive tutorial to learn about all the features of Digital Hub.",
+  "settings.tutorialDesc": "Need a refresher? Restart the interactive tutorial to learn about all the features of Rawaj.",
   "settings.general": "General",
   "settings.onboardingTutorial": "Onboarding Tutorial",
   "settings.tutorialRestarted": "Tutorial Restarted!",
@@ -315,7 +315,7 @@
   "tutorial.newPost.desc": "Start creating content here. Pick your brand, platforms, and assign it to a team member.",
   "tutorial.filters.title": "Filter & Focus",
   "tutorial.filters.desc": "Use filters to focus on specific brands, platforms, or team members.",
-  "login.title": "Digital Hub",
+  "login.title": "Rawaj",
   "login.subtitle": "Sign in to continue",
   "login.forgotPassword": "Forgot password?",
   "login.defaultCreds": "Default credentials:",
@@ -396,6 +396,16 @@
   "campaigns.editCampaign": "Edit Campaign",
   "campaigns.deleteCampaign": "Delete Campaign?",
   "campaigns.deleteConfirm": "Are you sure you want to delete this campaign? All associated data will be removed. This action cannot be undone.",
+  "campaigns.tracks": "Tracks",
+  "campaigns.addTrack": "Add Track",
+  "campaigns.noTracks": "No tracks yet. Add organic, paid, or SEO tracks to organize this campaign.",
+  "campaigns.postsLinked": "posts linked",
+  "campaigns.team": "Team",
+  "campaigns.assignMembers": "Assign Members",
+  "campaigns.linkedPosts": "Linked Posts",
+  "campaigns.notFound": "Campaign not found.",
+  "common.goBack": "Go back",
+  "finance.allocated": "allocated",
   "tracks.details": "Details",
   "tracks.metrics": "Metrics",
   "tracks.trackName": "Track Name",
@@ -503,6 +513,59 @@
   "budgets.dateExpensed": "Date",
   "dashboard.expenses": "Expenses",
   "finance.expenses": "Total Expenses",
+  "finance.totalReceived": "Total Received",
+  "finance.totalSpent": "Total Spent",
+  "finance.remaining": "Remaining",
+  "finance.revenue": "Revenue",
+  "finance.globalROI": "Global ROI",
+  "finance.budgetAllocation": "Budget Allocation",
+  "finance.manageBudgets": "Manage Budgets",
+  "finance.campaigns": "Campaigns",
+  "finance.projects": "Projects",
+  "finance.unallocated": "Unallocated",
+  "finance.budgetUtilization": "Budget Utilization",
+  "finance.globalPerformance": "Global Performance",
+  "finance.impressions": "Impressions",
+  "finance.clicks": "Clicks",
+  "finance.conversions": "Conversions",
+  "finance.campaignBreakdown": "Campaign Breakdown",
+  "finance.allocatedFunds": "Allocated Funds",
+  "finance.requestBudget": "Request Budget",
+  "finance.budgetRequests": "Budget Requests",
+  "finance.pendingApproval": "pending CEO approval",
+  "finance.justification": "Justification",
+  "finance.earmarkFor": "Earmark for",
+  "finance.submitRequest": "Submit Request",
+  "finance.cancelRequest": "Cancel Request",
+  "finance.approved": "Approved",
+  "finance.rejected": "Rejected",
+  "finance.cancelled": "Cancelled",
+  "finance.pending": "Pending",
+  "finance.ceoNote": "CEO Note",
+  "finance.requestPending": "budget request(s) pending CEO approval",
+  "finance.insufficientBudget": "Insufficient budget",
+  "finance.availableBudget": "Available",
+  "finance.requestMore": "Request more funds",
+  "finance.noCeoEmail": "CEO email not configured. Go to Settings.",
+  "finance.amount": "Amount",
+  "finance.justificationPlaceholder": "Why is this budget needed?",
+  "finance.optional": "Optional",
+  "settings.budgetApproval": "Budget Approval",
+  "settings.ceoEmail": "CEO / Budget Approver Email",
+  "settings.ceoEmailHint": "Email address that receives budget approval requests",
+  "budgetApproval.title": "Budget Approval",
+  "budgetApproval.amount": "Requested Amount",
+  "budgetApproval.requestedBy": "Requested by",
+  "budgetApproval.justification": "Justification",
+  "budgetApproval.earmarkedFor": "Earmarked for",
+  "budgetApproval.approve": "Approve",
+  "budgetApproval.reject": "Reject",
+  "budgetApproval.addNote": "Add a note (optional)",
+  "budgetApproval.approved": "This request has been approved.",
+  "budgetApproval.rejected": "This request has been rejected.",
+  "budgetApproval.expired": "This request has expired.",
+  "budgetApproval.alreadyHandled": "This request has already been processed.",
+  "finance.ofBudget": "of budget",
   "settings.uploads": "Uploads",
   "settings.maxFileSize": "Maximum File Size",
   "settings.maxFileSizeHint": "Maximum allowed file size for attachments (1-500 MB)",
@@ -629,7 +692,7 @@
   "review.alreadyReviewed": "This artefact has already been reviewed.",
   "review.statusLabel": "Status",
   "review.reviewedBy": "Reviewed by",
-  "review.poweredBy": "Powered by Samaya Digital Hub",
+  "review.poweredBy": "Powered by Rawaj",
   "review.loadFailed": "Failed to load artefact",
   "review.actionFailed": "Action failed",
   "review.actionCompleted": "Action completed successfully",
@@ -694,6 +757,8 @@
   "team.selectRole": "Select role...",
   "common.team": "Team",
   "common.noTeam": "No team",
+  "common.none": "None",
+  "common.success": "Success",
   "common.error": "An error occurred",
   "settings.roles": "Roles",
   "settings.rolesDesc": "Define job roles like Designer, Strategist, etc. These are assigned to team members separately from permission levels.",
@@ -717,6 +782,9 @@
   "header.budgets": "Budgets",
   "header.issues": "Issues",
   "header.settings": "Settings",
+  "header.translations": "Translations",
+  "calendar.unscheduledPosts": "Unscheduled Posts",
+  "calendar.statusLegend": "Status Legend",
   "header.users": "User Management",
   "header.projectDetails": "Project Details",
   "header.campaignDetails": "Campaign Details",