refactor(stats): 'Web / unsynced' bucket label → 'Web'; analytics tests isolated from the live reader

The bucket name read as confusing — 'unsynced' implied data loss when
the push is always captured; it only lacks a device credential. The
bucket is just 'Web' now (service fallback, stats.ts fallback, panel
copy, tests).

Also: analytics_test exact-zero assertions (EmptyHistory,
NoReadingHistory) ran against testuser, which is a LIVE reader — real
sessions accrued on it mid-suite and both flapped. They now run under
the fresh regular user, like the stats tests; the 'testuser is a live
reader' rule is recorded in AGENTS.md.

templates/stats_templ.go

@@ -58,7 +58,7 @@ func Stats(user User) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 4, ") · totals derive from your devices' sync pushes, not a stopwatch.</p></div><div class=\"card p-4 mb-6 flex flex-wrap items-center justify-between gap-3\"><div class=\"flex gap-2\" id=\"stats-range-selector\"><button data-range=\"7\" @click=\"selectRange('7')\" class=\"stats-range-btn btn btn-secondary text-sm\">Last 7 days</button> <button data-range=\"30\" @click=\"selectRange('30')\" class=\"stats-range-btn btn btn-secondary text-sm\">30 days</button> <button data-range=\"90\" @click=\"selectRange('90')\" class=\"stats-range-btn btn btn-secondary text-sm\">90 days</button> <button data-range=\"year\" @click=\"selectRange('year')\" class=\"stats-range-btn btn btn-secondary text-sm\">This year</button></div><p class=\"text-xs\" style=\"color: var(--text-secondary)\" id=\"stats-window-label\"></p></div><div class=\"grid grid-cols-2 lg:grid-cols-5 gap-4 mb-8\"><div class=\"stat-card\"><h3 class=\"text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Reading Time</h3><p id=\"stats-total-minutes\" class=\"text-3xl font-bold\" style=\"color: var(--accent)\">–</p></div><div class=\"stat-card\"><h3 class=\"text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Pages</h3><p id=\"stats-total-pages\" class=\"text-3xl font-bold\" style=\"color: var(--accent)\">–</p></div><div class=\"stat-card\"><h3 class=\"text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Streaks</h3><p id=\"stats-streaks\" class=\"text-lg font-bold leading-tight mt-1\" style=\"color: var(--text-primary)\">–</p></div><div class=\"stat-card\"><h3 class=\"text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Books Finished</h3><p id=\"stats-books-finished\" class=\"text-3xl font-bold\" style=\"color: var(--accent)\">–</p></div><div class=\"stat-card\"><h3 class=\"text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Most Active</h3><p id=\"stats-most-active\" class=\"text-sm font-bold leading-snug mt-2\" style=\"color: var(--text-primary)\">–</p></div></div><div class=\"grid grid-cols-1 lg:grid-cols-2 gap-6 mb-8\"><div class=\"card p-6\"><h3 class=\"text-sm font-semibold uppercase tracking-wide mb-4\" style=\"color: var(--text-secondary)\">Daily Reading Minutes</h3><div class=\"h-64\"><canvas id=\"stats-daily-minutes-chart\"></canvas></div></div><div class=\"card p-6\"><h3 class=\"text-sm font-semibold uppercase tracking-wide mb-4\" style=\"color: var(--text-secondary)\">Pages per Day</h3><div class=\"h-64\"><canvas id=\"stats-daily-pages-chart\"></canvas></div></div></div><div class=\"grid grid-cols-1 lg:grid-cols-2 gap-6 mb-8\"><div class=\"card p-6\"><h3 class=\"text-sm font-semibold uppercase tracking-wide mb-4\" style=\"color: var(--text-secondary)\">By Library</h3><div id=\"stats-library-breakdown\" class=\"space-y-3\"><div class=\"text-center py-6 text-sm\" style=\"color: var(--text-secondary)\">Loading…</div></div></div><div class=\"card p-6\"><h3 class=\"text-sm font-semibold uppercase tracking-wide mb-4\" style=\"color: var(--text-secondary)\">Most Read</h3><div id=\"stats-top-books\" class=\"space-y-3\"><div class=\"text-center py-6 text-sm\" style=\"color: var(--text-secondary)\">Loading…</div></div></div></div><div id=\"stats-empty\" class=\"card p-8 text-center hidden\"><p class=\"text-sm mb-2\" style=\"color: var(--text-primary)\">No reading sessions recorded in this range yet.</p><p class=\"text-xs\" style=\"color: var(--text-secondary)\">Sessions are captured every time a device syncs reading progress (KOReader, the app, the web reader).</p></div></div>")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 4, ") · totals derive from your devices' sync pushes, not a stopwatch.</p></div><div class=\"card p-4 mb-6 flex flex-wrap items-center justify-between gap-3\"><div class=\"flex gap-2\" id=\"stats-range-selector\"><button data-range=\"7\" @click=\"selectRange('7')\" class=\"stats-range-btn btn btn-secondary text-sm\">Last 7 days</button> <button data-range=\"30\" @click=\"selectRange('30')\" class=\"stats-range-btn btn btn-secondary text-sm\">30 days</button> <button data-range=\"90\" @click=\"selectRange('90')\" class=\"stats-range-btn btn btn-secondary text-sm\">90 days</button> <button data-range=\"year\" @click=\"selectRange('year')\" class=\"stats-range-btn btn btn-secondary text-sm\">This year</button></div><p class=\"text-xs\" style=\"color: var(--text-secondary)\" id=\"stats-window-label\"></p></div><div class=\"grid grid-cols-2 lg:grid-cols-5 gap-4 mb-8\"><div class=\"stat-card\"><h3 class=\"text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Reading Time</h3><p id=\"stats-total-minutes\" class=\"text-3xl font-bold\" style=\"color: var(--accent)\">–</p></div><div class=\"stat-card\"><h3 class=\"text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Pages</h3><p id=\"stats-total-pages\" class=\"text-3xl font-bold\" style=\"color: var(--accent)\">–</p></div><div class=\"stat-card\"><h3 class=\"text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Streaks</h3><p id=\"stats-streaks\" class=\"text-lg font-bold leading-tight mt-1\" style=\"color: var(--text-primary)\">–</p></div><div class=\"stat-card\"><h3 class=\"text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Books Finished</h3><p id=\"stats-books-finished\" class=\"text-3xl font-bold\" style=\"color: var(--accent)\">–</p></div><div class=\"stat-card\"><h3 class=\"text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Most Active</h3><p id=\"stats-most-active\" class=\"text-sm font-bold leading-snug mt-2\" style=\"color: var(--text-primary)\">–</p></div></div><div class=\"grid grid-cols-1 lg:grid-cols-2 gap-6 mb-8\"><div class=\"card p-6\"><h3 class=\"text-sm font-semibold uppercase tracking-wide mb-4\" style=\"color: var(--text-secondary)\">Daily Reading Minutes</h3><div class=\"h-64\"><canvas id=\"stats-daily-minutes-chart\"></canvas></div></div><div class=\"card p-6\"><h3 class=\"text-sm font-semibold uppercase tracking-wide mb-4\" style=\"color: var(--text-secondary)\">Pages per Day</h3><div class=\"h-64\"><canvas id=\"stats-daily-pages-chart\"></canvas></div></div></div><div class=\"grid grid-cols-1 lg:grid-cols-3 gap-6 mb-8\"><div class=\"card p-6\"><h3 class=\"text-sm font-semibold uppercase tracking-wide mb-4\" style=\"color: var(--text-secondary)\">By Library</h3><div id=\"stats-library-breakdown\" class=\"space-y-3\"><div class=\"text-center py-6 text-sm\" style=\"color: var(--text-secondary)\">Loading…</div></div></div><div class=\"card p-6\"><h3 class=\"text-sm font-semibold uppercase tracking-wide mb-4\" style=\"color: var(--text-secondary)\">By Device</h3><p class=\"text-xs mb-3\" style=\"color: var(--text-secondary)\">Where the sync pushes came from — registered device names, plus a Web bucket for pushes that carry no device credential (the web reader).</p><div id=\"stats-device-breakdown\" class=\"space-y-3\"><div class=\"text-center py-6 text-sm\" style=\"color: var(--text-secondary)\">Loading…</div></div></div><div class=\"card p-6\"><h3 class=\"text-sm font-semibold uppercase tracking-wide mb-4\" style=\"color: var(--text-secondary)\">Most Read</h3><div id=\"stats-top-books\" class=\"space-y-3\"><div class=\"text-center py-6 text-sm\" style=\"color: var(--text-secondary)\">Loading…</div></div></div></div><div id=\"stats-empty\" class=\"card p-8 text-center hidden\"><p class=\"text-sm mb-2\" style=\"color: var(--text-primary)\">No reading sessions recorded in this range yet.</p><p class=\"text-xs\" style=\"color: var(--text-secondary)\">Sessions are captured every time a device syncs reading progress (KOReader, the app, the web reader).</p></div></div>")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}