Reduce transcript buffer threshold from 300 to 100 chars

webapp/src/lib/services/__tests__/transcriptBuffer.test.ts

@@ -17,7 +17,7 @@ describe("TranscriptBuffer", () => {
     expect(text).toContain("world");
   });
 
-  it("reports ready when buffer reaches 300 char threshold", () => {
+  it("reports ready when buffer reaches 100 char threshold", () => {
     const shortResult = buffer.append("short");
     expect(shortResult.ready).toBe(false);
 
@@ -58,7 +58,7 @@ describe("TranscriptBuffer", () => {
 
   it("threshold getter returns MIN_CHARS_TO_PROCESS", () => {
     expect(buffer.threshold).toBe(MIN_CHARS_TO_PROCESS);
-    expect(buffer.threshold).toBe(300);
+    expect(buffer.threshold).toBe(100);
   });
 
   it("tracks charsBuffered accurately across multiple appends", () => {

webapp/src/lib/services/transcriptBuffer.ts

@@ -5,7 +5,7 @@
  * are fully isolated.
  */
 
-export const MIN_CHARS_TO_PROCESS = 300; // ~30 sec of speech
+export const MIN_CHARS_TO_PROCESS = 100; // ~10 sec of speech
 const CONTEXT_OVERLAP = 200; // keep last N chars on flush
 
 export interface AppendResult {

webapp/src/lib/stores/__tests__/arbitrageStore.test.ts

@@ -79,7 +79,7 @@ describe("arbitrageStore", () => {
       streamedMarkets: [{ id: "m1" }] as never[],
       latestAnalysis: { detected: true } as never,
       isBuffering: true,
-      bufferProgress: { chars: 100, threshold: 300 },
+      bufferProgress: { chars: 100, threshold: 100 },
     });
 
     useArbitrageStore.getState().clearStreamedMarkets();
@@ -102,11 +102,11 @@ describe("arbitrageStore", () => {
   });
 
   it("setBuffering updates isBuffering and bufferProgress", () => {
-    useArbitrageStore.getState().setBuffering({ chars: 150, threshold: 300 });
+    useArbitrageStore.getState().setBuffering({ chars: 50, threshold: 100 });
     expect(useArbitrageStore.getState().isBuffering).toBe(true);
     expect(useArbitrageStore.getState().bufferProgress).toEqual({
-      chars: 150,
-      threshold: 300,
+      chars: 50,
+      threshold: 100,
     });
 
     useArbitrageStore.getState().setBuffering(null);