docs: reserve seam for complete capabilities

packages/client/ui-primitives/src/clipboard.ts

@@ -1,5 +1,5 @@
 // Host clipboard write shared by Web UI copy controls. Success feedback stays
-// with each control; this seam only reports whether the host accepted a write.
+// with each control; this helper only reports whether the host accepted a write.
 
 /**
  * Write text to the host clipboard, preferring the async Clipboard API and

packages/client/ui-primitives/src/markdown/incremental.ts

@@ -95,7 +95,7 @@ export class IncrementalMarkdownParser {
     // to verify the whole retained prefix, and startsWith compares bytes two
     // orders of magnitude faster than parsing them — the cost this class
     // exists to remove. Passing append/reset deltas instead would push
-    // append bookkeeping across the session-projection seam for a check
+    // append bookkeeping across the session-projection update boundary for a check
     // that stays sub-millisecond at realistic reply sizes.
     if (!text.startsWith(this.prevText)) {
       this.prevText = ''

packages/client/ui-primitives/tests/diff-block.spec.tsx

@@ -4,7 +4,7 @@
 // its singular/plural, the head/tail height cap and its expand control, the
 // empty-diffs null render, and the copy control writing the prefixed diff text
 // on both the accepted and the refused clipboard paths. writeClipboard's own
-// return contract is pinned in terminal-block.spec.tsx (the shared seam), so
+// return contract is pinned in terminal-block.spec.tsx (the shared return contract), so
 // only its DOM consequence is asserted here.
 
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'

packages/client/ui-primitives/tests/terminal-block.spec.tsx

@@ -3,7 +3,7 @@
 // arms, the prompt line's run-state dot, the exit-status pill, the head/tail height cap and its expand control,
 // and the copy control writing the raw output on both the accepted and the
 // refused clipboard paths. writeClipboard's own return contract is pinned here
-// too, since it is the seam both copy controls in this package share; the
+// too, since it is the return contract both copy controls in this package share; the
 // resolution of ANSI runs into styles is pinned in ansi.spec.ts, so only its
 // DOM consequence (which runs get a span wrapper) is asserted here.