From d6f60f4a81d9714176ef3d8cc60938c01c55b7d6 Mon Sep 17 00:00:00 2001
From: Adam Malczewski <github@tradam.dev>
Date: Mon, 22 Jun 2026 11:23:43 +0900
Subject: feat: show 5-char git hash next to hamburger for cache-bust detection
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Vite define bakes __APP_VERSION__ (git rev-parse --short=5 HEAD) at build
time — survives bundling into the arch package deploy. Falls back to 'dev'
when not in a git repo. Also fixes two noNonNullAssertion warnings in
place.ts.
---
 src/app/App.svelte        |  6 ++++++
 src/core/metrics/place.ts | 14 ++++++++++----
 src/vite-env.d.ts         |  3 +++
 vite.config.ts            | 14 ++++++++++++++
 4 files changed, 33 insertions(+), 4 deletions(-)

diff --git a/src/app/App.svelte b/src/app/App.svelte
index 3024a44..41e68ef 100644
--- a/src/app/App.svelte
+++ b/src/app/App.svelte
@@ -301,6 +301,12 @@
 				onClose={(id) => store.closeTab(id)}
 				onNewDraft={() => store.newDraft()}
 			/>
+			<span
+				class="shrink-0 select-none px-1 font-mono text-[10px] leading-none text-base-content/30"
+				title="Build version (git short hash)"
+			>
+				{__APP_VERSION__}
+			</span>
 			<button
 				class="btn btn-square btn-ghost btn-sm mx-1 shrink-0"
 				aria-label="Toggle sidebar"
diff --git a/src/core/metrics/place.ts b/src/core/metrics/place.ts
index 091fe8f..2402e3e 100644
--- a/src/core/metrics/place.ts
+++ b/src/core/metrics/place.ts
@@ -111,8 +111,11 @@ export function interleaveTurnMetrics(
 		}
 		if (bestEntry >= 0) {
 			usedEntries.add(bestEntry);
-			segmentEntry.set(seg, entries[bestEntry]!);
-			segmentEntryIndex.set(seg, bestEntry);
+			const e = entries[bestEntry];
+			if (e !== undefined) {
+				segmentEntry.set(seg, e);
+				segmentEntryIndex.set(seg, bestEntry);
+			}
 		}
 	}
 
@@ -123,8 +126,11 @@ export function interleaveTurnMetrics(
 		while (nextUnused < K && usedEntries.has(nextUnused)) nextUnused++;
 		if (nextUnused < K) {
 			usedEntries.add(nextUnused);
-			segmentEntry.set(seg, entries[nextUnused]!);
-			segmentEntryIndex.set(seg, nextUnused);
+			const e = entries[nextUnused];
+			if (e !== undefined) {
+				segmentEntry.set(seg, e);
+				segmentEntryIndex.set(seg, nextUnused);
+			}
 			nextUnused++;
 		}
 	}
diff --git a/src/vite-env.d.ts b/src/vite-env.d.ts
index 4078e74..2a2b515 100644
--- a/src/vite-env.d.ts
+++ b/src/vite-env.d.ts
@@ -1,2 +1,5 @@
 /// <reference types="svelte" />
 /// <reference types="vite/client" />
+
+/** 5-char git short hash, baked at build time (vite.config.ts `define`). */
+declare const __APP_VERSION__: string;
diff --git a/vite.config.ts b/vite.config.ts
index 8ca4beb..bdfabe6 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -1,3 +1,4 @@
+import { execSync } from "node:child_process";
 import { svelte } from "@sveltejs/vite-plugin-svelte";
 import tailwindcss from "@tailwindcss/vite";
 import { svelteTesting } from "@testing-library/svelte/vite";
@@ -15,9 +16,22 @@ export default defineConfig({
 	// disables Vite's DNS-rebinding host check. (The WS URL still runs in the browser — set
 	// VITE_WS_URL to the backend's reachable host when browsing from another device.)
 	server: { port: 24204, host: true, allowedHosts: true },
+	define: {
+		// Bake the 5-char git short hash at build time so it survives bundling
+		// (incl. arch package deploys). Falls back to "dev" when not in a git repo.
+		__APP_VERSION__: JSON.stringify(getGitShortHash()),
+	},
 	test: {
 		environment: "jsdom",
 		globals: true,
 		setupFiles: ["./vitest-setup.ts"],
 	},
 });
+
+function getGitShortHash(): string {
+	try {
+		return execSync("git rev-parse --short=5 HEAD", { encoding: "utf-8" }).trim();
+	} catch {
+		return "dev";
+	}
+}
-- 
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