feat(browser): iframe browser with element inspector and paste fallback

Inspect button injects hover overlay + click handler into same-origin
iframes to extract outerHTML + computed CSS. For cross-origin sites,
paste mode lets users paste HTML from DevTools. Extracted content goes
into the composer as context.

Author: Swofty-Developments

crates/tauri-app/Cargo.toml

@@ -7,7 +7,7 @@ edition.workspace = true
 tauri-build = { version = "2", features = [] }
 
 [dependencies]
-tauri = { version = "2", features = ["unstable"] }
+tauri = { version = "2", features = [] }
 tauri-plugin-dialog = "2"
 tauri-plugin-shell = "2"
 codeforge-session = { path = "../session" }