docs: correct spec assumptions (storage line, status pill, footer workers)

- 'NAS UI' tag was a misinterpretation of the watched-folder path; the
  spec now calls it the storage line and notes J621 is folder-based
- Status pill documents the real backend fields: environment, actual
  host OS, page generation time, e621 API request time
- Footer strip is marked as a proposal; the workers count is real data
  from the stats page, not invented thread counts
- Removed the remaining 'Write to NAS' / 'Ingest to NAS' phrasing

frontend/design.md_j621_frontend_spec.md

@@ -2,7 +2,7 @@
 
 > **Version:** 1.4.2-stable  
 > **Theme Foundation:** Catppuccin Mocha + e621 Authentic Taxonomy Architecture  
-> **Target Platform:** Desktop-first, fully responsive self-hosted NAS / Home Server Media Web Application  
+> **Target Platform:** Desktop-first, fully responsive self-hosted home-server media web application (the library is a watched folder on disk, not a NAS appliance)  
 > **Reference Design System:** `Mocha Archive Terminal` (`{{DATA:DESIGN_SYSTEM:DESIGN_SYSTEM_3}}`)
 
 ---
@@ -77,13 +77,14 @@ All tag chips, counters, and sidebar taxonomy badges strictly adhere to e621's e
 
 ### 4.1 Global Frame (Shell)
 - **Top App Bar (`#11111b`, height: 56px):**
-  - Left: Brand mark `J621` badge (`#cba6f7` badge with `NAS UI` tag).
+  - Left: Brand mark `J621` badge (`#cba6f7`) followed by the **storage line** — the path of the watched folder that J621 indexes (e.g. `/mnt/media/library`). J621 is folder-based: this is just a path on disk, not a NAS/appliance indicator.
   - Center: Nav pills: `Library`, `Online`, `Pools`, `Followed`, `Upload`, `Duplicates`, and `Stats [STAFF]`.
-  - Right: System latency pill (`ENV: PROD · LINUX · 18ms (e621: 4ms)`), user avatar.
+  - Right: System status pill with real backend values, never hardcoded: environment (`DEV`/`PROD`), the actual host OS, page generation time, and the total e621 API request time for that page load — e.g. `ENV: PROD · LINUX · 18ms (e621: 4ms)`. Followed by the user avatar.
 - **Global Footer Status Strip (`#11111b`, height: 32px):**
-  - Left: `📁 Local Storage: /data/media/j621/archive`
+  - The strip placement is a proposal; its values are real and drawn from the existing stats data.
-  - Center: `⚡ Active Workers: 4 Parsing | Sync Queue: 0 Pending`
+  - Left: the watched folder path — `📁 Local Storage: /mnt/media/library`.
-  - Right: `J621 Engine v1.4.2-stable`
+  - Center: `⚡ Active Workers: N running | Queue: M pending` — the count of active optimization/ingest jobs and queued downloads (the original app surfaced this on its stats page; the footer simply keeps it visible).
+  - Right: the build actually running — `J621 <version>` / commit hash.
 - **Collapsible Sidebar (Behavior):**
   - **Closed by default** across all gallery and viewer views to prioritize screen real estate.
   - Toggled via `☰` button or quick keyboard shortcut (`Ctrl+B` or `⌘B`).
@@ -105,7 +106,7 @@ All tag chips, counters, and sidebar taxonomy badges strictly adhere to e621's e
 - **2-Column Layout:**
   - **Left Rail (320px):** Categorized tag hierarchy (`Artist`, `Copyright`, `Species`, `General`, `Meta`) with tag search links `?` and follow `+` toggles. Specs sheet (Post ID, MD5, dimensions, format, source URL).
   - **Right Main Area:**
-    - Action Header: `Download to Local Library`, `Write to NAS`, `Favorite`, `Add to Pool`.
+    - Action Header: `Download` (local files) / `Download to Library` (online posts), `Favorite`, `Add to Pool` — downloading writes into the watched folder; there is no separate "NAS" step. Favorites and pools are e621-side actions.
     - Media Canvas: Centered high-resolution image or loopable WebM/MP4 viewer with pan/zoom.
     - Context Panels: Artist commentary, local storage allocation paths (`/data/media/j621/...`), inode/checksum integrity report, and user comment stream.
 
@@ -138,5 +139,5 @@ All tag chips, counters, and sidebar taxonomy badges strictly adhere to e621's e
    - `/`: Focus search bar
    - `Ctrl+K` / `⌘K`: Quick command palette & tag finder
    - `[` / `]`: Previous / Next post in detail view
-   - `D`: Trigger "Download / Ingest to NAS"
+   - `D`: Trigger Download (or "Download to Library" while browsing online posts)
    - `F`: Toggle favorite / follow