Relocate truncate helpers to shared util

Move general-purpose truncateAddr/truncateTxid out of the feed-specific
post-display module into src/util so the recent-profiles view depends on
the shared utility layer rather than a sibling feature module.

By architect.

docs/reviews/reduce-dry-duplication-summary.md

@@ -0,0 +1,56 @@
+# Architectural Review Summary — reduce-dry-duplication
+
+## Task and commits reviewed
+- Task: `reduce-dry-duplication`
+- Source commit merged and reviewed: `eed9d70f6f` (`Reduce DRY duplication in services and components`, from refactorer)
+- Reviewed as a batch via `ready_for_next.sh`; merged into `swarmforge-architect` as a fast-forward and processed.
+
+## Architectural findings and fixes applied
+Reviewed the refactorer's DRY reduction for UI/Core separation, dependency rule,
+information hiding/encapsulation, and local code quality.
+
+Findings (mostly sound, two notes):
+1. **MemoDb service consolidation** (`src/services/memo-db.js`) — `getRecentProfiles`/
+   `getRecentPosts` → `getRecent`, and `getProfile`/`getProfilePic`/`getName` →
+   `getLevelResource`. Preserves error semantics (recent → always throws; level → null
+   on 404). Good cohesion, HTTP details stay in the service. **No change needed.**
+2. **AppUtil `pasteFromClipboard`** (`src/util/index.js`) — centralizes clipboard-paste
+   into the shared utility; components no longer duplicate clipboard reading. Good
+   information hiding. **No change needed.**
+3. **`PlaceholderView` extraction** — shared placeholder used by placeholder2/3.
+   Cohesive. **No change needed.**
+4. **`wallet-summary` blur toggle generalization** — `toggleBlur(field)` via dynamic
+   setter name reduces duplication. Functional and correct; the dynamic
+   `set${Capitalized}` construction is a mild readability tradeoff but acceptable to
+   preserve the DRY intent. **No change.**
+5. **Cross-feature dependency (fixed)** — `recent-profiles` imported the general-purpose
+   `truncateAddr`/`truncateTxid` from the feed-specific `post-feed/post-display`.
+   For cohesion and dependency direction, these pure string helpers belong in the
+   shared utility layer. **Applied fix:** moved `truncateAddr`/`truncateTxid` to
+   `src/util/index.js`; `post-display` now imports from util and re-exports them for
+   its existing consumers; `recent-profiles` imports directly from `src/util`.
+   This removes a sibling-feature → sibling-feature module coupling and keeps generic
+   display helpers in the shared utility.
+
+## Verification results
+- **Mutation** (`mutate4javascript --scan`): memo-db.js 4 sites, util/index.js 6 sites,
+  post-display.js 8 sites. No JS unit test suite exists in this project
+  (`npm test` → `echo 'no tests'`); there is no coverage harness, so all sites are
+  uncovered and no survivors can be killed by tests. JSX component files cannot be
+  parsed by the mutation tool (no `jsx` Babel plugin); they are UI adapters and are
+  outside the currently testable boundary.
+- **DRY** (`dry4javascript src`): **no duplicate candidates found** — the reduction
+  is effective and my fix introduced no duplication.
+- **Gherkin acceptance mutation (soft)**: not runnable — this project has no
+  `.feature` files, no acceptance pipeline, and no runner adapter.
+- Property tests: none present in this project.
+
+## Suite status
+- No JavaScript unit/acceptance suite exists (`npm test` echoes "no tests").
+- `bb.edn` test task covers the swarmforge helper scripts only (unrelated to this UI work).
+
+## Handoffs sent
+- `git_handoff` → coder, refactorer (priority `00`, task `reduce-dry-duplication`),
+  to review the architectural commit.
+
+By architect.