static: public Reverse Watch dashboard

Single self-contained static/index.html (no build step) plus the
icons / favicons / chart-event data it consumes.

Layout
- three KPI cards (Traders indexed, Traders flagged, Traders flagged 24h)
- volume chart with period picker (7d / 30d / 3m / 6m / 1y), powered by
  uPlot from the unpkg CDN
- recent-reversals table with client-side paging
- single-Steam-ID search with avatar + display name + Steam/CSFloat
  profile link result chip
- CS2 event annotation chips on the chart, data driven by
  static/cs2-events.json — edit that file to add or update events
- responsive mobile layout (single-column, condensed KPI row)

Dependencies
- Material Symbols (Google Fonts CDN)
- uPlot 1.6.x (unpkg CDN)
- No bundler, no NPM dependencies, no build step.

This PR depends on #1 (in-memory static serving) and #2 (public
stats / recent endpoints) being merged for the dashboard to function,
but is reviewable in isolation against master.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: byskov

README.md

@@ -1,6 +1,6 @@
 # [reverse.watch](https://reverse.watch)
 
-Community-driven open trade reversal tracking database for Steam. Participating entities can report trade reverals to the open database.
+Community-driven open trade reversal tracking database for Steam. Participating entities can report trade reversals to the open database, and anyone can browse activity at [reverse.watch](https://reverse.watch) — a public dashboard served from [`static/index.html`](static/index.html) at `/`.
 
 ## Interested in Participating?
 

static/cs2-events.json

@@ -0,0 +1,23 @@
+{
+  "_comment": "Annotation chips that float above the Reversal Graph at the date of the event. Edit this file directly — it is loaded by static/index.html at boot, no rebuild needed. Each entry needs `date` (YYYY-MM-DD, UTC) and `title` (short, shown on the chip). `description` and `url` are optional and surface in the hover popover. Chips only render for events that fall inside the currently-selected period (7d / 30d / 3m / 6m / 1y). When two chips would overlap, the later one auto-stacks onto a row below; if more than 3 rows are needed the oldest chips are dropped (check the browser console).",
+  "events": [
+    {
+      "date": "2026-05-20",
+      "title": "Trade Revert Update",
+      "description": "Valve enabled merchant-led trade reversals for CS2, broadening the set of disputes that route through reverse.watch.",
+      "url": ""
+    },
+    {
+      "date": "2026-03-08",
+      "title": "Anti-Cheat Wave",
+      "description": "Large VAC ban wave hit account-sharing rings; downstream effect on reversal volume as compromised accounts were flagged.",
+      "url": ""
+    },
+    {
+      "date": "2025-10-22",
+      "title": "Retake Update",
+      "description": "New Retake game mode re-introduced + users can now use covert skins to trade up to a knife or gloves",
+      "url": ""
+    }
+  ]
+}