feat(FN-2181): add dashboard dev-server process manager and API routes

- Introduce DevServerStore and DevServerProcessManager with a simplified store API contract
- Add dev-server script detection and route legacy manager behavior through the new process manager
- Add a dedicated dev-server router with start/stop/status/log endpoints and SSE event streaming
- Wire dev-server routes into the main route table and hook manager shutdown into server teardown
- Expand tests and architecture docs for store, process, route, detection, and SSE coverage

.changeset/fix-favorites-dedup.md

@@ -0,0 +1,10 @@
+---
+"@gsxdsm/fusion": patch
+---
+
+Fix: Remove duplicate model entries in CustomModelDropdown favorites list
+
+Favorited models were appearing twice in the dropdown - once in the favorites
+section at the top, and again in their provider group. Now favorited models
+only appear in the favorites section, eliminating the duplicate FireworksAI
+(or any provider) section when models are favorited.

.changeset/fix-footer-indicator-and-nodes-label.md

@@ -0,0 +1,8 @@
+---
+"@gsxdsm/fusion": patch
+---
+
+Fix running indicator scroll sync and add nodesView label
+
+- Remove GPU compositing hint (`transform: translateZ(0)`) from executor status bar indicator that was causing it to appear stuck during page scrolling
+- Add missing "nodesView" → "Nodes View" label mapping in experimental features settings

.changeset/fix-running-indicator-scroll.md

@@ -0,0 +1,5 @@
+---
+"@gsxdsm/fusion": patch
+---
+
+Fix running indicator rendering issue during dashboard scroll by adding GPU compositing hint (`transform: translateZ(0)`) to prevent the animated dot from appearing "stuck" or detached from the footer when scrolling.