ui: panel restructure — active-studio subpanel, compact details, queue promoted

Coherent UI pass against the user's feedback that the panel had grown
into a wall of stacked rows. Six concrete changes, one commit:

1. Active-Studio details split into STAGE_PT_active_studio.
   The per-Studio details (lock, name, parent, group, output,
   capture toggles, notes, tags, stored props, post-render actions)
   used to live inside STAGE_PT_main, inflating the main panel by
   ~15 rows and pushing every other subpanel off-screen. Now they
   live in their own collapsible subpanel that polls False when no
   Studio is active (panel hidden entirely, no empty header).

2. Capture toggles compacted to one icon-toggle row.
   Was 5 stacked rows of named checkboxes (Camera / World /
   Visibility / Render Settings / Output Path). Now a single row of
   5 icon toggles with property tooltips — saves 4 vertical rows
   without losing affordance.

3. Lock demoted to subpanel header icon.
   Was a full-width button under Render. Now a small lock/unlock
   icon next to the Studio name in the Active Studio header — out
   of the way until you actually need to toggle it. Subpanel body
   greys out when locked, same as before.

4. Resolved-path hint reformatted as folder-above-filename.
   The "→ /Users/.../Renders/Studio_…0001.png" hint used to truncate
   ugly. Now renders as a small two-line box: the (truncated-from-
   the-left if needed) directory above, the full filename below
   with the FILE_TICK icon. Long Renders folders read clean.

5. Default Output Path moved to the bottom of STAGE_PT_main.
   Useful but rarely changed — was eating prime panel real estate
   at the top. Now sits below the Apply/Update/Render row where
   it's still discoverable but doesn't dominate.

6. Subpanel stack reordered via bl_order:
       0 Stage              (list + controls)
       1 Active Studio      (auto-hidden when empty)
       2 Render Queue       (promoted from bottom; primary workflow)
       3 Bulk Edit          (default closed)
       4 Groups             (default closed)
       5 Stored Properties  (default closed)
   Render Queue used to be at the bottom; promoting it puts the
   render workflow near the top where you actually use it.

Other:
- Render Queue panel is no longer DEFAULT_CLOSED (it's now a top-of-
  stack workflow panel, deserves to be open by default).

Test: bumped test_queue_panel_registered to assert the new bl_order
+ that DEFAULT_CLOSED is gone. Total suite: 170/171 (lone
pre-existing dirty-state reload flake unchanged).

Author: BlueLazyFish

stage/ui/lister.py

@@ -49,6 +49,9 @@ class STAGE_PT_lister(Panel):
     bl_region_type = 'UI'
     bl_category = "Stage"
     bl_options = {'DEFAULT_CLOSED'}
+    # Bottom of the stack — it's a global-search panel, not in the daily
+    # workflow flow (active Studio → queue → bulk → groups).
+    bl_order = 5
 
     def draw(self, context):
         layout = self.layout