diff --git a/.beads/issues.jsonl b/.beads/issues.jsonl
index 83a2e65..355b911 100644
--- a/.beads/issues.jsonl
+++ b/.beads/issues.jsonl
@@ -43,22 +43,23 @@
{"id":"ifcurl-ei8","title":"Fix syncCameraUrl: convert WebGL coords to IFC world space","description":"syncCameraUrl in viewer.py currently records camera.position/direction/up directly from Three.js, which are in WebGL/Three.js coordinate space (Y-up, different scale/orientation than IFC). The ifc:// URL spec expects IFC world coordinates (Z-up, matching BCF viewpoint conventions). Need to find the IFC→Three.js transform that @thatopen/components applies when loading a model, then apply its inverse in syncCameraUrl before serialising the camera params. Repos cloned for reference: ~/src/engine_components and ~/src/engine_fragment.","status":"closed","priority":2,"issue_type":"bug","owner":"bruno@postle.net","created_at":"2026-04-23T05:53:06Z","created_by":"Bruno Postle","updated_at":"2026-04-23T06:14:36Z","closed_at":"2026-04-23T06:14:36Z","close_reason":"Split into atomic tasks: ifcurl-ldk, ifcurl-j2s, ifcurl-cmd","dependency_count":0,"dependent_count":0,"comment_count":0}
{"id":"ifcurl-i1s","title":"Test Phase 3b web viewer end-to-end","description":"After deploying the footer template (ifcurl-ach), test the full flow: open an .ifc file in Forgejo at localhost:3000, click 'View in 3D', verify the viewer loads the model. CDN versions (@thatopen/components 2.4.0, three 0.160.0, web-ifc 0.0.66) may need adjustment if the API has changed.","status":"closed","priority":2,"issue_type":"task","assignee":"Bruno Postle","owner":"bruno@postle.net","created_at":"2026-04-23T05:48:01Z","created_by":"Bruno Postle","updated_at":"2026-04-23T20:05:04Z","started_at":"2026-04-23T19:54:56Z","closed_at":"2026-04-23T20:05:04Z","close_reason":"Closed","dependencies":[{"issue_id":"ifcurl-i1s","depends_on_id":"ifcurl-49o","type":"blocks","created_at":"2026-04-23T07:14:12Z","created_by":"Bruno Postle","metadata":"{}"},{"issue_id":"ifcurl-i1s","depends_on_id":"ifcurl-4yu","type":"blocks","created_at":"2026-04-23T07:14:11Z","created_by":"Bruno Postle","metadata":"{}"},{"issue_id":"ifcurl-i1s","depends_on_id":"ifcurl-ach","type":"blocks","created_at":"2026-04-23T06:48:10Z","created_by":"Bruno Postle","metadata":"{}"},{"issue_id":"ifcurl-i1s","depends_on_id":"ifcurl-ahd","type":"blocks","created_at":"2026-04-23T07:02:54Z","created_by":"Bruno Postle","metadata":"{}"}],"dependency_count":4,"dependent_count":1,"comment_count":0}
{"id":"ifcurl-ach","title":"Deploy Phase 3b footer template to Forgejo","description":"The footer.tmpl file that injects a 'View in 3D' button on .ifc file pages has been written but not yet deployed. Deploy it to /etc/forgejo/templates/custom/footer.tmpl and verify the button appears when viewing an .ifc file on localhost:3000.","status":"closed","priority":2,"issue_type":"task","owner":"bruno@postle.net","created_at":"2026-04-23T05:47:53Z","created_by":"Bruno Postle","updated_at":"2026-04-23T06:14:35Z","closed_at":"2026-04-23T06:14:35Z","close_reason":"Split into atomic tasks: ifcurl-ohq, ifcurl-49o","dependencies":[{"issue_id":"ifcurl-ach","depends_on_id":"ifcurl-ahd","type":"blocks","created_at":"2026-04-23T07:02:40Z","created_by":"Bruno Postle","metadata":"{}"}],"dependency_count":1,"dependent_count":1,"comment_count":0}
+{"id":"ifcurl-0n8","title":"viewer: storey filter has no 'show all' / reset option","description":"Clicking a storey row in the model overview panel isolates that storey via hider.isolate(). There is no way to reset back to the full model view. Clicking the active storey row should toggle it off (show all), and/or a 'show all' button should appear at the top of the Storeys section when a storey is active. Note: the storey click handler at line ~1016 already has toggle-off logic (if activeRow === row → hider.set(true)) but it only works if you click the same row a second time — the bug is that clicking a different storey, then trying to go back, leaves no 'all storeys' option visible.","status":"open","priority":3,"issue_type":"bug","owner":"bruno@postle.net","created_at":"2026-04-26T07:33:19Z","created_by":"Bruno Postle","updated_at":"2026-04-26T07:33:19Z","dependency_count":0,"dependent_count":0,"comment_count":0}
{"id":"ifcurl-21x","title":"viewer: smooth transition when URL settings change","description":"Changing the visibility dropdown, selector, or other settings triggers a full page reload, causing the screen to go blank for several seconds while the model re-fetches and re-parses. Options: (a) CSS fade-in on load only — minimal change; (b) capture canvas snapshot before navigate and show as placeholder during reload; (c) in-place model reload without page navigation — best UX but requires refactoring main() to support hot-reload. Option (b) requires preserveDrawingBuffer:true in the WebGL renderer.","status":"closed","priority":3,"issue_type":"feature","assignee":"Bruno Postle","owner":"bruno@postle.net","created_at":"2026-04-26T07:13:24Z","created_by":"Bruno Postle","updated_at":"2026-04-26T07:17:15Z","started_at":"2026-04-26T07:15:10Z","closed_at":"2026-04-26T07:17:15Z","close_reason":"Closed","dependency_count":0,"dependent_count":0,"comment_count":0}
{"id":"ifcurl-npy","title":"viewer: add zoom-all / reset-view button","description":"When the camera has panned or zoomed away from the building, there is no way to get back to a full view of the model. Add a 'zoom all' or 'reset view' button in the toolbar that calls cameraControls.fitToBox(model.box, true) to fit the entire model back in view.","status":"closed","priority":3,"issue_type":"feature","assignee":"Bruno Postle","owner":"bruno@postle.net","created_at":"2026-04-26T07:12:59Z","created_by":"Bruno Postle","updated_at":"2026-04-26T07:17:14Z","started_at":"2026-04-26T07:15:07Z","closed_at":"2026-04-26T07:17:14Z","close_reason":"Closed","dependency_count":0,"dependent_count":0,"comment_count":0}
{"id":"ifcurl-8yw","title":"viewer: add visibility dropdown when selector is active","description":"When a selector is set in the viewer toolbar, show a drop-down next to the selector input to choose between highlight (ghost non-selected), ghost (alias for highlight), and isolate (hide non-selected). Currently visibility can only be set by editing the raw URL.","status":"closed","priority":3,"issue_type":"feature","owner":"bruno@postle.net","created_at":"2026-04-26T06:57:52Z","created_by":"Bruno Postle","updated_at":"2026-04-26T07:17:13Z","closed_at":"2026-04-26T07:17:13Z","close_reason":"Closed","dependency_count":0,"dependent_count":0,"comment_count":0}
-{"id":"ifcurl-olo","title":"viewer: 'View in 3D' link should open in a new tab","description":"The link to the viewer should open in a new tab (target=_blank) so the user stays on the Forgejo page. It previously opened in a new window but now opens in the same window, causing the user to navigate away from Forgejo.","status":"open","priority":3,"issue_type":"bug","owner":"bruno@postle.net","created_at":"2026-04-26T06:24:44Z","created_by":"Bruno Postle","updated_at":"2026-04-26T06:24:44Z","dependency_count":0,"dependent_count":0,"comment_count":0}
-{"id":"ifcurl-mts","title":"viewer: selector text box too narrow","description":"The selector input field in the viewer UI is not wide enough, making it awkward to type or read selector expressions. It should be wider to accommodate typical selector strings like 'IfcWall, Name=\"Core Wall\"'.","status":"open","priority":3,"issue_type":"bug","owner":"bruno@postle.net","created_at":"2026-04-26T06:22:33Z","created_by":"Bruno Postle","updated_at":"2026-04-26T06:22:33Z","dependency_count":0,"dependent_count":0,"comment_count":0}
+{"id":"ifcurl-olo","title":"viewer: 'View in 3D' link should open in a new tab","description":"The link to the viewer should open in a new tab (target=_blank) so the user stays on the Forgejo page. It previously opened in a new window but now opens in the same window, causing the user to navigate away from Forgejo.","status":"closed","priority":3,"issue_type":"bug","assignee":"Bruno Postle","owner":"bruno@postle.net","created_at":"2026-04-26T06:24:44Z","created_by":"Bruno Postle","updated_at":"2026-04-26T07:44:10Z","started_at":"2026-04-26T07:35:12Z","closed_at":"2026-04-26T07:44:10Z","close_reason":"footer.tmpl already has target=_blank; fix was already in the repo, deployment pending","dependency_count":0,"dependent_count":0,"comment_count":0}
+{"id":"ifcurl-mts","title":"viewer: selector text box too narrow","description":"The selector input field in the viewer UI is not wide enough, making it awkward to type or read selector expressions. It should be wider to accommodate typical selector strings like 'IfcWall, Name=\"Core Wall\"'.","status":"closed","priority":3,"issue_type":"bug","assignee":"Bruno Postle","owner":"bruno@postle.net","created_at":"2026-04-26T06:22:33Z","created_by":"Bruno Postle","updated_at":"2026-04-26T07:43:43Z","started_at":"2026-04-26T07:35:13Z","closed_at":"2026-04-26T07:43:43Z","close_reason":"Closed","dependency_count":0,"dependent_count":0,"comment_count":0}
{"id":"ifcurl-irp","title":"viewer: no render_diff preview shown on Forgejo commit pages","description":"When viewing a commit in Forgejo that contains .ifc file changes (e.g. /bruno/simple-ifc/commit/61e64e05d783e621d77869feadfc218a0858c499), no 3D diff preview image is injected. The footer.tmpl is supposed to detect .ifc diffs on commit pages and inject an img tag pointing to /render_diff. Either the detection is not firing or the render_diff request is failing.","status":"closed","priority":3,"issue_type":"bug","owner":"bruno@postle.net","created_at":"2026-04-25T22:17:59Z","created_by":"Bruno Postle","updated_at":"2026-04-25T22:57:57Z","closed_at":"2026-04-25T22:57:57Z","close_reason":"Fixed by render_diff fixes in commit 837a9d1","dependency_count":0,"dependent_count":0,"comment_count":0}
{"id":"ifcurl-3sz","title":"preview: visibility=highlight renders non-selected elements as opaque grey instead of transparent grey","description":"In the rendered PNG, visibility=highlight shows selected elements normally but non-selected elements appear as opaque grey rather than transparent grey (semi-transparent). The highlight mode should make non-selected elements translucent so the selected elements are visually emphasised against a faded context.","status":"closed","priority":3,"issue_type":"bug","assignee":"Bruno Postle","owner":"bruno@postle.net","created_at":"2026-04-25T22:15:42Z","created_by":"Bruno Postle","updated_at":"2026-04-25T23:03:49Z","started_at":"2026-04-25T22:59:19Z","closed_at":"2026-04-25T23:03:49Z","close_reason":"Not a bug — opaque grey is the model's actual IFC material colors displayed normally in highlight mode, which is correct per spec","dependency_count":0,"dependent_count":0,"comment_count":0}
{"id":"ifcurl-d7m","title":"viewer: visibility=highlight renders as isolate (non-selected elements should be transparent grey)","description":"In the viewer, visibility=highlight and visibility=isolate produce identical results — only selected elements are shown. The correct behaviour for highlight is to show selected elements normally and render all other elements as transparent grey. Isolate should hide non-selected elements entirely. The preview service already handles both modes correctly.","notes":"First fix attempt (commit 7aa4ef8) used highlightByID('select', ...) but selected elements still hidden — highlightByID may not prevent hider from hiding them, or the Highlighter 'select' style still isolates. Needs further investigation into OBC Highlighter vs Hider interaction.","status":"closed","priority":3,"issue_type":"bug","assignee":"Bruno Postle","owner":"bruno@postle.net","created_at":"2026-04-25T22:15:41Z","created_by":"Bruno Postle","updated_at":"2026-04-26T07:17:13Z","started_at":"2026-04-25T22:59:21Z","closed_at":"2026-04-26T07:17:13Z","close_reason":"Closed","dependency_count":0,"dependent_count":0,"comment_count":0}
{"id":"ifcurl-xy9","title":"viewer: orthographic projection not implemented (works in preview)","description":"The viewer ignores the 'scale' parameter that selects orthographic projection. The preview service renders orthographic views correctly, but the 3D viewer in the browser always shows perspective. The viewer needs to switch to an orthographic camera when the IFC URL contains 'scale=' instead of 'fov='.","status":"open","priority":3,"issue_type":"bug","owner":"bruno@postle.net","created_at":"2026-04-25T22:15:38Z","created_by":"Bruno Postle","updated_at":"2026-04-25T22:15:38Z","dependency_count":0,"dependent_count":0,"comment_count":0}
{"id":"ifcurl-a9x","title":"viewer: typing in selector box does not filter or apply selector","description":"Typing an IfcOpenShell selector expression (e.g. 'IfcWall') into the selector input box has no effect. The selector should be applied to the model, updating the view to show only matching elements.","status":"closed","priority":3,"issue_type":"bug","owner":"bruno@postle.net","created_at":"2026-04-25T21:37:17Z","created_by":"Bruno Postle","updated_at":"2026-04-25T22:36:10Z","closed_at":"2026-04-25T22:36:10Z","close_reason":"selector box now working in viewer","dependency_count":0,"dependent_count":0,"comment_count":0}
{"id":"ifcurl-66h","title":"viewer: browse branches/tags button does not navigate to selected ref","description":"The browse branches and tags button does not appear to do anything when clicked. The ref input box has a datalist populated with heads/main but selecting a branch/tag and clicking browse does not navigate to that ref.","status":"open","priority":3,"issue_type":"bug","owner":"bruno@postle.net","created_at":"2026-04-25T21:37:16Z","created_by":"Bruno Postle","updated_at":"2026-04-25T21:37:16Z","dependency_count":0,"dependent_count":0,"comment_count":0}
-{"id":"ifcurl-njq","title":"viewer: 'open new issue' link uses https:// but Forgejo may be on http://","description":"The 'open new issue' link hardcodes https:// scheme, but the Forgejo instance may be served over http:// (e.g. on localhost for development). Should use the same scheme as the current page or derive it from the Forgejo base URL.","status":"open","priority":3,"issue_type":"bug","owner":"bruno@postle.net","created_at":"2026-04-25T21:37:14Z","created_by":"Bruno Postle","updated_at":"2026-04-25T21:37:14Z","dependency_count":0,"dependent_count":0,"comment_count":0}
+{"id":"ifcurl-njq","title":"viewer: 'open new issue' link uses https:// but Forgejo may be on http://","description":"The 'open new issue' link hardcodes https:// scheme, but the Forgejo instance may be served over http:// (e.g. on localhost for development). Should use the same scheme as the current page or derive it from the Forgejo base URL.","status":"closed","priority":3,"issue_type":"bug","assignee":"Bruno Postle","owner":"bruno@postle.net","created_at":"2026-04-25T21:37:14Z","created_by":"Bruno Postle","updated_at":"2026-04-26T07:43:42Z","started_at":"2026-04-26T07:35:13Z","closed_at":"2026-04-26T07:43:42Z","close_reason":"Closed","dependency_count":0,"dependent_count":0,"comment_count":0}
{"id":"ifcurl-uo9","title":"viewer: BCF export does not include preview PNG","description":"BCF export produces a valid BCF file but the viewpoint snapshot (preview PNG) is missing. BCF spec requires a snapshot image in each viewpoint. The ifcurl render service should be called to generate this.","status":"open","priority":3,"issue_type":"bug","owner":"bruno@postle.net","created_at":"2026-04-25T21:37:13Z","created_by":"Bruno Postle","updated_at":"2026-04-25T21:37:13Z","dependency_count":0,"dependent_count":0,"comment_count":0}
{"id":"ifcurl-07d","title":"viewer: model overview only shows storeys, other element types not listed","description":"The model overview panel lists storeys which can be toggled, but no other element types appear. Expected to see walls, slabs, columns etc. The tree/overview is incomplete or only partially populated.","status":"open","priority":3,"issue_type":"bug","owner":"bruno@postle.net","created_at":"2026-04-25T21:37:12Z","created_by":"Bruno Postle","updated_at":"2026-04-25T21:37:12Z","dependency_count":0,"dependent_count":0,"comment_count":0}
{"id":"ifcurl-1pa","title":"viewer: clip planes button only changes cursor, does not add clip plane","description":"Clicking the clip button changes the cursor to a crosshair but does not actually add a clipping plane to the model. The clip plane interaction is not implemented or not wired up.","status":"open","priority":3,"issue_type":"bug","owner":"bruno@postle.net","created_at":"2026-04-25T21:37:10Z","created_by":"Bruno Postle","updated_at":"2026-04-25T21:37:10Z","dependency_count":0,"dependent_count":0,"comment_count":0}
-{"id":"ifcurl-2m9","title":"viewer: move 'copy IFC URL' button to immediately after URL text box","description":"The copy-to-clipboard button for the IFC URL should be placed directly adjacent to the URL text input, not elsewhere in the UI. Currently the layout separates them, which is confusing.","status":"open","priority":3,"issue_type":"bug","owner":"bruno@postle.net","created_at":"2026-04-25T21:36:47Z","created_by":"Bruno Postle","updated_at":"2026-04-25T21:36:47Z","dependency_count":0,"dependent_count":0,"comment_count":0}
+{"id":"ifcurl-2m9","title":"viewer: move 'copy IFC URL' button to immediately after URL text box","description":"The copy-to-clipboard button for the IFC URL should be placed directly adjacent to the URL text input, not elsewhere in the UI. Currently the layout separates them, which is confusing.","status":"closed","priority":3,"issue_type":"bug","assignee":"Bruno Postle","owner":"bruno@postle.net","created_at":"2026-04-25T21:36:47Z","created_by":"Bruno Postle","updated_at":"2026-04-26T07:43:43Z","started_at":"2026-04-26T07:35:13Z","closed_at":"2026-04-26T07:43:43Z","close_reason":"Closed","dependency_count":0,"dependent_count":0,"comment_count":0}
{"id":"ifcurl-6ys","title":"Research alternative URL schemes before ifc:// is committed to","description":"The ifc:// scheme name is not yet set in stone. It's worth researching whether a different scheme would be more appropriate or less likely to conflict with existing tooling.\\n\\nLook at how other tools handle similar problems:\\n- pip uses git+https:// and git+ssh:// (prefix on top of existing schemes)\\n- Are there existing ifc:// registrations or tools that would conflict?\\n- What scheme patterns are used by other domain-specific version-controlled asset tools?\\n- Alternatives to consider: ifcgit://, git+ifc://, ifc+git://, or a vendor-prefixed form\\n- Check IANA registered schemes and common-use unregistered schemes for conflicts\\n\\nGoal: make a confident decision to keep ifc:// or switch, before the scheme is baked into any external integrations.","notes":"Research complete. Summary:\n\n- ifc is NOT registered with IANA. bcf, bim also unregistered. Clean namespace.\n- No existing tool or buildingSMART standard uses ifc:// — no conflict risk.\n- BCF (bcf://) would be confusing — BCF is a live buildingSMART standard, don't use it.\n- pip-style compound schemes (ifc+git://, ifc+https://) look appealing but hurt more than they help: they fragment the transport-inference design, improve nothing for OS handlers or terminal clickability, and are harder to explain.\n- Forgejo: CUSTOM_URL_SCHEMES defaults to allowing all schemes — ifc:// links render fine out of the box.\n- GitHub/terminals: bare custom URLs are never auto-linked regardless of scheme choice. Explicitly formatted markdown links work fine.\n\nDecision: keep ifc://\n\nAction to add to roadmap: submit a provisional IANA registration (First Come First Served, ~1 hour, just an email to iana@iana.org with scheme name, syntax summary, security notes, and a spec URL). Do this when Phase 1 spec stabilises.","status":"closed","priority":3,"issue_type":"task","assignee":"Bruno Postle","owner":"bruno@postle.net","created_at":"2026-04-25T09:08:13Z","created_by":"Bruno Postle","updated_at":"2026-04-25T11:17:44Z","started_at":"2026-04-25T11:04:50Z","closed_at":"2026-04-25T11:17:44Z","close_reason":"Keep ifc://. Namespace is clean (no IANA registration, no prior art). Compound schemes (ifc+git://) would break transport-inference design with no practical benefit. Action item: provisional IANA registration when Phase 1 spec stabilises.","dependency_count":0,"dependent_count":0,"comment_count":0}
{"id":"ifcurl-gy8","title":"Viewer: 'View in 3D' uses commit hash but no UI affordance to switch to branch tip","description":"The 'View in 3D' button in footer.tmpl always generates an ifc:// URL with a commit hash (@abc123...). This is correct for reproducibility, but users who want to track 'the latest version of main' must manually change the URL from @\u003chash\u003e to @heads/main. There is no indication in the viewer that the model is pinned to a specific commit. Add a visual indicator (e.g. 'commit abc1234 · switch to heads/main') in the viewer toolbar when the ref is a commit hash, offering a one-click switch to the branch tip. The branch name could be inferred from Forgejo's API given the commit hash.","status":"closed","priority":3,"issue_type":"feature","assignee":"Bruno Postle","owner":"bruno@postle.net","created_at":"2026-04-24T11:04:58Z","created_by":"Bruno Postle","updated_at":"2026-04-25T18:12:57Z","started_at":"2026-04-25T18:02:24Z","closed_at":"2026-04-25T18:12:57Z","close_reason":"Closed","dependency_count":0,"dependent_count":0,"comment_count":0}
{"id":"ifcurl-dag","title":"Viewer: no model metadata panel — disciplines, spatial structure, element counts","description":"Beyond individual element selection, reviewers and designers need a model overview: what disciplines/types are present, how many elements, what building storeys exist, what's the spatial structure (site/building/storey/space hierarchy). A collapsible side panel showing IFC spatial tree and type breakdown would give immediate context and allow navigating by storey or discipline. Without this, reviewers must already know the model structure before opening the viewer.","status":"closed","priority":3,"issue_type":"feature","assignee":"Bruno Postle","owner":"bruno@postle.net","created_at":"2026-04-24T11:04:55Z","created_by":"Bruno Postle","updated_at":"2026-04-25T19:04:25Z","started_at":"2026-04-25T18:38:17Z","closed_at":"2026-04-25T19:04:25Z","close_reason":"Closed","dependency_count":0,"dependent_count":0,"comment_count":0}
diff --git a/forgejo/custom/public/assets/viewer.html b/forgejo/custom/public/assets/viewer.html
index bf14e08..0319dab 100644
--- a/forgejo/custom/public/assets/viewer.html
+++ b/forgejo/custom/public/assets/viewer.html
@@ -145,12 +145,12 @@
+
-