Add backlog task-5: view navigation and zoomable diagrams

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

backlog/tasks/task-5 - Add-view-navigation-tabs-and-zoomable-diagrams.md

@@ -0,0 +1,45 @@
+---
+id: task-5
+title: Add view navigation tabs and zoomable diagrams
+status: Done
+assignee:
+  - '@claude'
+created_date: '2026-02-13 15:49'
+updated_date: '2026-02-13 15:49'
+labels:
+  - feature
+  - UX
+  - d3
+dependencies: []
+priority: high
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+Added inter-visualization navigation and zoom/pan to rWallet.online diagrams.
+
+**View Navigation:** Added tab bar below the address input on all 3 visualization pages (Multi-Chain Flow, Balance River, Single-Chain Sankey). Tabs preserve the current wallet address via URL params so users can switch views without re-entering the address. Active tab is highlighted. Tab links update dynamically when a new wallet is loaded.
+
+**Zoomable Sankey (wallet-visualization.html):** Wrapped all Sankey content in a d3 zoom group. Users can scroll to zoom in/out and drag to pan. Reset View button returns to default. Scale extent 0.3x–5x.
+
+**Zoomable Multi-Chain Flow (wallet-multichain-visualization.html):** Same zoom/pan pattern applied to the bezier flow chart. Scroll to zoom, drag to pan, Reset View button.
+
+**Files modified:** js/router.js, wallet-visualization.html, wallet-multichain-visualization.html, wallet-timeline-visualization.html (cache bump only).
+
+Commit: c02fa26 — pushed to Gitea + GitHub, deployed to production.
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+<!-- AC:BEGIN -->
+- [x] #1 View nav tabs appear on all 3 visualization pages
+- [x] #2 Tabs preserve wallet address when switching views
+- [x] #3 Active tab highlighted for current page
+- [x] #4 Sankey diagram supports scroll-to-zoom and drag-to-pan
+- [x] #5 Multi-chain flow chart supports scroll-to-zoom and drag-to-pan
+- [x] #6 Reset View button resets zoom to default on both charts
+- [x] #7 Balance River existing zoom still works
+- [x] #8 Tab links update when new wallet address is entered
+- [x] #9 Cache busted to v=5 for router.js on all pages
+- [x] #10 Deployed to production at rwallet.online
+<!-- AC:END -->