fix(i18n): Translate interpolated UI text through a tx template tag (#98)

About 270 UI strings were JS template literals with interpolation passed to exact catalog lookup, so they could never be translated; about 25 more spliced lowercase English fragments into sentences.

`tx` now also works as a template tag (`` tx`Remove data source '${name}'?` ``): it looks up the entry by the literal parts (`{name}` placeholders), translates interpolated values that have entries, and remembers generated text so it re-translates after a language switch or when the catalog loads later. Call sites use the tag; spliced fragments are written as whole sentences per variant. Adds 280 Chinese translations and removes stale ones.

The catalog guard now also fails on untagged template literals reaching exact lookup (unless allowlisted with a reason), tagged text missing from the catalog, case-changed or ternary-suffix interpolations, and duplicate template patterns.

Claude-Session: https://claude.ai/code/session_01VUYsdXA2nkF5v6zsC93dpn

src/features/github/PullRequestsView.tsx

@@ -35,6 +35,7 @@ import {
 import { addComment, checkoutPullRequest, openCommentLocation, openFileDiff, openUrl, submitReview } from "./ops";
 import { cancelBusy, loadDetails, refreshAll, select, setQuery, useGithub, type DetailTab } from "./store";
 import styles from "./Github.module.css";
+import { tx } from "@/platform/i18n";
 
 const STATES: Array<{ value: PrStateFilter; label: string }> = [
   { value: "open", label: "Open" },
@@ -515,9 +516,9 @@ function Details() {
         aria-label="Pull request"
         items={[
           { id: "overview", label: "Overview" },
-          { id: "files", label: `Files ${pr.files.length}` },
-          { id: "commits", label: `Commits ${pr.commits.length}` },
-          { id: "conversation", label: `Conversation ${pr.timeline.length + comments.length}` },
+          { id: "files", label: tx`Files ${pr.files.length}` },
+          { id: "commits", label: tx`Commits ${pr.commits.length}` },
+          { id: "conversation", label: tx`Conversation ${pr.timeline.length + comments.length}` },
         ]}
       />
       {tab === "overview" && <Overview pr={pr} />}

src/features/github/dialogs.tsx

@@ -5,6 +5,7 @@ import type { ReviewEvent } from "@/platform/ipc";
 import { call, commands } from "@/platform/ipc";
 import { Checkbox, Dialog, Input, Select, T } from "@/ui";
 import styles from "./Github.module.css";
+import { tx } from "@/platform/i18n";
 
 interface Entry {
   id: number;
@@ -134,7 +135,7 @@ function CreateDialog(props: {
         />
         <div className={styles.formRow}>
           <Checkbox checked={draft} onChange={setDraft} label="Draft" />
-          <Checkbox checked={push} onChange={setPush} label={`Push '${props.head}' first`} />
+          <Checkbox checked={push} onChange={setPush} label={tx`Push '${props.head}' first`} />
         </div>
       </div>
     </Dialog>
@@ -165,7 +166,7 @@ function ReviewDialog(props: {
   return (
     <Dialog
       open
-      title={`Review #${props.number}`}
+      title={tx`Review #${props.number}`}
       onClose={() => props.onDone(null)}
       width={520}
       buttons={[