diff --git a/.planning/phases/03-document-migration-multi-user-isolation/03-UI-SPEC.md b/.planning/phases/03-document-migration-multi-user-isolation/03-UI-SPEC.md
index 66ca471..0ae7833 100644
--- a/.planning/phases/03-document-migration-multi-user-isolation/03-UI-SPEC.md
+++ b/.planning/phases/03-document-migration-multi-user-isolation/03-UI-SPEC.md
@@ -1,7 +1,8 @@
 ---
 phase: 3
 slug: document-migration-multi-user-isolation
-status: draft
+status: approved
+reviewed_at: 2026-05-23
 shadcn_initialized: false
 preset: none
 created: 2026-05-23
@@ -65,11 +66,13 @@ Identical to Phase 2 — inherited, not re-specified.
 Font weight scale: exactly 2 weights — regular (400) and semibold (600). Do not introduce `font-medium` (500) or `font-bold` (700). Do not use `font-medium` that already appears in `.nav-link` scoped styles — that is a pre-existing pattern in AppSidebar and must not be propagated to new components.
 
 **New in Phase 3:**
-- Quota bar label: `text-xs text-gray-500` (body at reduced size — acceptable exception for sidebar metadata density).
-- Upload step label (beneath progress bar): `text-xs text-gray-400` — same pattern as existing `UploadProgress.vue` status lines.
-- Error detail lines in quota rejection: `text-xs text-red-600` — matches Phase 2 inline field error style.
+- Quota bar label: `text-sm text-gray-500` — visual subordination via muted color, not reduced size.
+- Upload step label (beneath progress bar): `text-sm text-gray-400` — subordination via color only; same contrast pattern as existing `UploadProgress.vue` status lines.
+- Error detail lines in quota rejection: `text-sm text-red-600` — matches Phase 2 inline field error style.
 
-**Source:** Phase 2 UI-SPEC. `UploadProgress.vue` uses `text-xs text-gray-400` for status lines — retained for consistency.
+All three usages remain within the 4-size scale (Body/Label/Heading/Display). The existing `UploadProgress.vue` pattern of `text-xs` is NOT propagated to new Phase 3 code — all new code uses `text-sm` with color differentiation for hierarchy.
+
+**Source:** Phase 2 UI-SPEC. Maximum 4 type sizes enforced — no `text-xs` in new Phase 3 components.
 
 ---
 
@@ -141,7 +144,7 @@ Bar specifications:
 - In-progress fill color: `bg-indigo-500`
 - Complete fill color: `bg-green-500`
 - Error fill color: `bg-red-400` (stops at last % value, does not reset to 0)
-- Percentage label: `text-xs text-gray-400 text-right mt-0.5` — shown during upload, hidden after completion
+- Percentage label: `text-sm text-gray-400 text-right mt-1` — shown during upload, hidden after completion
 
 ### Upload Progress Values by Step
 
@@ -180,9 +183,9 @@ Insert the quota bar between the topics nav section (`.flex-1 nav`) and the bott
 ```html
 <div class="px-4 py-3 border-t border-gray-100">
   <!-- Label row -->
-  <div class="flex items-center justify-between mb-1.5">
-    <span class="text-xs font-semibold text-gray-500">Storage</span>
-    <span class="text-xs {label-color}">X MB of Y MB</span>
+  <div class="flex items-center justify-between mb-1">
+    <span class="text-sm font-semibold text-gray-500">Storage</span>
+    <span class="text-sm {label-color}">X MB of Y MB</span>
   </div>
   <!-- Bar track -->
   <div class="w-full h-2 bg-gray-200 rounded-full">
@@ -238,8 +241,8 @@ Displayed inline within the upload progress row, replacing the progress bar and
 Error block styles:
 - Container: `mt-1 p-3 rounded-lg bg-red-50 border border-red-200`
 - Heading: `text-sm font-semibold text-red-700`
-- Body lines: `text-xs text-red-600 mt-0.5`
-- Link: `text-xs text-red-600 underline hover:text-red-700 font-semibold` — navigates to `/settings` (the existing settings route; storage settings live there in Phase 3 since the dedicated storage page is Phase 4)
+- Body lines: `text-sm text-red-600 mt-1`
+- Link: `text-sm text-red-600 underline hover:text-red-700 font-semibold` — navigates to `/settings` (the existing settings route; storage settings live there in Phase 3 since the dedicated storage page is Phase 4)
 
 Values populated from 413 response body: `{"detail": {"used_bytes": N, "limit_bytes": M, "rejected_bytes": K}}`.
 - "This file (X MB)" — `rejected_bytes` converted to MB, 1 decimal place