docs: record file-viewer design-review spot-check (no changes)

Reviewed the text/image/PDF/CSV file-viewer implementations in
CodeBrowserScreen.kt as part of the ongoing design-review pass; live
spot-checked the text viewer on a real .gitignore. No bug or design gap
found.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docs/development-log.md

@@ -914,3 +914,27 @@ This is the append-only implementation and handoff record shared by Codex and Cl
 - Next recommended task: continue the design-review pass — the text/image/CSV/PDF file viewers have
   not yet been reviewed this session.
 - Next owner: Claude, continuing per the standing direction.
+
+## 2026-08-29 (continued) — design-review pass: file viewers spot-checked, no changes
+
+- Agent and role: Claude, direct continuation of the same live session, continuing the design-review
+  pass per "쭉 이어서 개발이랑 디자인 진행해줄래?" after landing TASK-042 and its follow-up.
+- What was checked: read `CodeBrowserScreen.kt`'s `FileContent`/`ImageContent`/`PdfContent` rendering
+  in full — text (monospace, `SelectionContainer`, copy button, explicit truncation flag), image
+  (zoomable/swipeable gallery with a page-style index counter across sibling images in the same
+  folder), PDF (same zoom/swipe interaction, per-page rendering via Android's own `PdfRenderer`), and
+  CSV (table). Live-verified the text path on-device: opened a real `.gitignore` in
+  RobotAutomationDevelopment-Dept/LGPRI_RD_PROJECT_RectangleWelder — renders correctly (monospace,
+  "코드 복사" button, full content visible, no truncation needed for this file's size).
+- Result: no bug or design gap found. The text/image/PDF/CSV viewers already follow this app's
+  established conventions (explicit truncation state rather than silent clipping, plain-text status
+  labels avoided where a colored badge now exists, zoom/swipe interaction consistent between image and
+  PDF).
+- Files changed: none — this log entry only.
+- Known limitations: image/CSV/PDF viewers were reviewed by reading the implementation and were not
+  individually live-spot-checked this pass — none of the industrial C#/C++ repositories browsed this
+  session had an example image/CSV/PDF file readily reachable within a reasonable navigation depth to
+  open one live.
+- Next recommended task: no further design-review gaps are currently queued; awaiting the next live
+  bug report or explicit direction from the human product owner.
+- Next owner: Claude.