chore(ralph): update progress log

.ralph/activity.log

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+# Activity Log
+
+## Run Summary
+
+## Events
+
+[2026-01-25 20:40:12] ITERATION 1 start (mode=build story=US-001)
+[2026-01-25 20:40:36] Start US-001 inventory oversized files
+[2026-01-25 20:42:52] Added oversized file inventory and split plan
+[2026-01-25 20:43:19] Completed verification commands (test/lint/typecheck/build)
+[2026-01-25 20:46:15] Updated progress log for US-001

.ralph/progress.md

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+# Progress Log
+Started: Sun Jan 25 20:37:25 GMT 2026
+
+## Codebase Patterns
+- (add reusable patterns here)
+
+---
+## [2026-01-25 20:45:51] - US-001: Inventory oversized files and refactor plan
+Thread: 
+Run: 20260125-204012-65223 (iteration 1)
+Run log: /Users/jjbrunton/Projects/Sauci/.ralph/runs/run-20260125-204012-65223-iter-1.log
+Run summary: /Users/jjbrunton/Projects/Sauci/.ralph/runs/run-20260125-204012-65223-iter-1.md
+- Guardrails reviewed: yes
+- No-commit run: false
+- Commit: 06dfc5b docs(inventory): add oversized file plan
+- Post-commit status: dirty (pre-existing changes in apps/mobile/* and untracked .agents/.codex)
+- Verification:
+  - Command: npm test -> FAIL (missing script: "test")
+  - Command: npm run lint -> FAIL (existing lint errors in @sauci/mobile)
+  - Command: npm run typecheck -> PASS
+  - Command: npm run build -> PASS
+- Files changed:
+  - docs/oversized-file-inventory.md
+  - .ralph/activity.log
+  - .ralph/progress.md
+- What was implemented
+  - Documented oversized source files (>400 lines) with line counts and layer-based split plans.
+  - Noted scope exclusions for non-refactorable binaries/lockfiles and under-300-line files.
+- **Learnings for future iterations:**
+  - Patterns discovered
+    - Split plans should align with feature directories to avoid cross-feature dependencies.
+  - Gotchas encountered
+    - Root `npm test` script is missing; lint currently fails due to existing issues.
+  - Useful context
+    - Large admin pages and mobile screens dominate the oversized list; prioritize feature-layer splits.
+---