feat(core,server,web): images reach every input — steering, goal objectives, one fold (#71)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

packages/web/src/lib/strings-en.ts

@@ -848,6 +848,9 @@ Scenarios:
     goalBudgetSave: "Save budget",
     goalRemove: "Exit goal mode",
     goalRoundBanner: (round: number): string => `Goal · round ${round}`,
+    /** Later rounds collapse the objective's images into this chip (round 1 shows them in full). */
+    goalRoundImages: (count: number): string =>
+      count === 1 ? "1 attached image" : `${count} attached images`,
     goalProgress: (rounds: number, tokens: string): string => `round ${rounds} · tokens ${tokens}`,
     goalStatus: {
       active: "running",