chore: gitignore generated _templ.go files, track .templ sources

Generated _templ.go files are deterministic output from .templ sources,
same as output.css from input.css. Remove them from version control to
reduce diff noise and merge conflicts. Add build:templ and live:templ
tasks to the Taskfile so generation happens as part of the build.

features/lobby/components/gamelist.templ

@@ -0,0 +1,109 @@
+package components
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/ryanhamamura/c4/game"
+	"github.com/starfederation/datastar-go/datastar"
+)
+
+templ GameList(games []GameListItem) {
+	if len(games) > 0 {
+		<div class="mt-8 text-left">
+			<h3 class="mb-4 text-center text-lg font-bold">Your Games</h3>
+			<div class="flex flex-col gap-2">
+				for _, g := range games {
+					@gameListEntry(g)
+				}
+			</div>
+		</div>
+	}
+}
+
+templ gameListEntry(g GameListItem) {
+	<div class="flex items-center gap-2 p-2 bg-base-200 rounded-lg transition-colors hover:bg-base-300">
+		<a
+			href={ templ.SafeURL("/games/" + g.ID) }
+			class="flex-1 flex justify-between items-center px-2 py-1 no-underline text-base-content"
+		>
+			<div class="flex flex-col gap-1">
+				<span class="font-bold">{ opponentDisplay(g) }</span>
+				<span class={ statusClass(g) }>{ statusText(g) }</span>
+			</div>
+			<div>
+				<span class="text-xs opacity-60">{ formatTimeAgo(g.LastPlayed) }</span>
+			</div>
+		</a>
+		<button
+			type="button"
+			class="btn btn-ghost btn-sm btn-square hover:btn-error"
+			data-on:click={ datastar.DeleteSSE("/games/%s", g.ID) }
+		>
+			&times;
+		</button>
+	</div>
+}
+
+func statusText(g GameListItem) string {
+	switch game.GameStatus(g.Status) {
+	case game.StatusWaitingForPlayer:
+		return "Waiting for opponent"
+	case game.StatusInProgress:
+		if g.IsMyTurn {
+			return "Your turn!"
+		}
+		return "Opponent's turn"
+	}
+	return ""
+}
+
+func statusClass(g GameListItem) string {
+	switch game.GameStatus(g.Status) {
+	case game.StatusWaitingForPlayer:
+		return "text-sm opacity-60"
+	case game.StatusInProgress:
+		if g.IsMyTurn {
+			return "text-sm text-success font-bold"
+		}
+		return "text-sm"
+	}
+	return ""
+}
+
+func opponentDisplay(g GameListItem) string {
+	if g.OpponentName == "" {
+		return "Waiting for opponent..."
+	}
+	return "vs " + g.OpponentName
+}
+
+func formatTimeAgo(t time.Time) string {
+	if t.IsZero() {
+		return ""
+	}
+	duration := time.Since(t)
+
+	if duration < time.Minute {
+		return "just now"
+	}
+	if duration < time.Hour {
+		mins := int(duration.Minutes())
+		if mins == 1 {
+			return "1 minute ago"
+		}
+		return fmt.Sprintf("%d minutes ago", mins)
+	}
+	if duration < 24*time.Hour {
+		hours := int(duration.Hours())
+		if hours == 1 {
+			return "1 hour ago"
+		}
+		return fmt.Sprintf("%d hours ago", hours)
+	}
+	days := int(duration.Hours() / 24)
+	if days == 1 {
+		return "yesterday"
+	}
+	return fmt.Sprintf("%d days ago", days)
+}