refactor: narrow web image input v1

packages/client/ui-trajectory/src/client/layout.ts

@@ -644,7 +644,6 @@ function assistantSourceBlock(block: AssistantBlock): TrajectorySourceBlock {
     case 'image': return {
       type: 'image',
       content: stringifySourceValue(block.attachment),
-      ...(block.alt !== undefined ? { imageAlt: block.alt } : {}),
     }
     case 'other': return sourceBlock(block.block)
   }

packages/client/ui-trajectory/tests/client-bundle.spec.ts

@@ -60,7 +60,7 @@ describe('tsdown client artifact', () => {
     const { handoff, surface } = await loadArtifact()
     expect(handoff.id).toBe(PLUGIN_ID)
     expect(surface.apply).toBeTypeOf('function')
-    expect(surface.inject).toEqual(['slots', 'conversation', 'sessions'])
+    expect(surface.inject).toEqual(['slots', 'conversation', 'sessionHistory'])
   })
 
   it.skipIf(code === undefined)('mounted as an object plugin, apply registers the view tab on the real ring', async () => {
@@ -72,10 +72,10 @@ describe('tsdown client artifact', () => {
       name: 'root',
       children: { 'conversation.view': { kind: 'list', scope: 'session' } },
     }, (_p: { renderSlot?: unknown }) => null)
-    // The plugin injects 'conversation' as an ordering edge and 'sessions'
+    // The plugin injects 'conversation' as an ordering edge and 'sessionHistory'
     // for its per-session history callback; this bench supplies both.
     ctx.provide('conversation', {})
-    ctx.provide('sessions', {})
+    ctx.provide('sessionHistory', {})
     const fiber = ctx.plugin(surface as { apply: (ctx: Context) => void })
     await fiber.await()
     expect(slots.entries('conversation.view').map(e => e.options.id)).toEqual(['trajectory'])