From dffca699f0bf554314db697c600f0675a793862e Mon Sep 17 00:00:00 2001
From: murashit <murashit@proton.me>
Date: Tue, 7 Jul 2026 22:26:57 +0900
Subject: [PATCH] Show empty thread context as zero percent

---
 .../chat/panel/surface/composer-projection.tsx   |  6 +++++-
 .../chat/panel/surface/projections.test.ts       | 16 ++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/features/chat/panel/surface/composer-projection.tsx b/src/features/chat/panel/surface/composer-projection.tsx
index 526a2a86..0b427a5d 100644
--- a/src/features/chat/panel/surface/composer-projection.tsx
+++ b/src/features/chat/panel/surface/composer-projection.tsx
@@ -98,7 +98,7 @@ function composerMetaViewModel(
   const context = contextSummary(snapshot);
   const selectedModel = resolution.model.effective;
   const effort = resolution.reasoningEffort.effective;
-  const composerContext = contextComposerMeter(context?.percent ?? null);
+  const composerContext = contextComposerMeter(context?.percent ?? emptyThreadContextPercent(snapshot));
   const compactEffort = effort ? compactReasoningEffortLabel(effort) : null;
   const planActive = resolution.collaborationMode.effective === "plan";
   const reviewActive = resolution.autoReview.active;
@@ -122,6 +122,10 @@ function composerMetaViewModel(
   };
 }
 
+function emptyThreadContextPercent(snapshot: RuntimeSnapshot): number | null {
+  return snapshot.activeThreadId ? null : 0;
+}
+
 function runtimeComposerChoices(input: RuntimeComposerChoicesInput): {
   modelChoices: ChatPanelComposerRuntimeChoice[];
   effortChoices: ChatPanelComposerRuntimeChoice[];
diff --git a/tests/features/chat/panel/surface/projections.test.ts b/tests/features/chat/panel/surface/projections.test.ts
index 5bedd794..3bb2c1bd 100644
--- a/tests/features/chat/panel/surface/projections.test.ts
+++ b/tests/features/chat/panel/surface/projections.test.ts
@@ -232,6 +232,22 @@ describe("chat panel surface projections", () => {
     });
   });
 
+  it("shows zero percent composer context before a thread starts", () => {
+    expect(composerProjectionFromState(composerProjectionActionsFixture(), chatStateFixture()).meta).toMatchObject({
+      fatal: null,
+      context: {
+        cells: [
+          { text: "⣀", placeholder: true },
+          { text: "⣀", placeholder: true },
+          { text: "⣀", placeholder: true },
+          { text: "⣀", placeholder: true },
+        ],
+        percent: " 0%",
+      },
+      statusSummary: "Context 0%, plan off, auto-review off, fast off, model default, reasoning effort default",
+    });
+  });
+
   it("keeps zero percent composer context fixed-width and visible", () => {
     let state = chatStateFixture();
     state = chatStateWith(state, { activeThread: { id: "thread-1" } });