fix: resolve fst-no-std version conflict causing pizza-engine CI check failure (#1074)

* feat: add deep research report workflow and viewer

* docs: update  changelog

* ci: update pizza repository reference from infinilabs to pizza-rs org

* fix deep research completion state

* fix: prevent deep research stream timeout

* fix: update deep research cancel copy

* fix: apply rustfmt formatting to attachment.rs

* fix: resolve fst-no-std version conflict in pizza-engine CI check

The 'check (macos-latest)' CI job fails because pizza-engine (added as a
CI dependency) uses infinilabs/fst-no-std while its transitive dependency
fst-regex uses pizza-rs/fst-no-std. Cargo treats these as two separate
crates, causing:

1. Automaton trait incompatibility between the two fst_no_std instances
2. MapBuilder, Error::Io, and Set::from_iter not found because the
   infinilabs fork gates them behind 'std' feature while pizza-engine
   only enabled 'alloc'

Fix:
- Add [patch."https://github.com/infinilabs/fst-no-std"] to
  src-tauri/Cargo.toml to redirect the infinilabs fork to
  pizza-rs/fst-no-std, unifying both into a single crate instance.
  This patch is a no-op for normal builds without pizza-engine.
- Update the CI workflow to also add fst-no-std with std feature so that
  Error::Io (gated by std) and MapBuilder are available after the redirect.

* Update Cargo.toml

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Medcl <m@medcl.net>

docs/content.en/docs/release-notes/_index.md

@@ -15,6 +15,7 @@ Information about release notes of Coco App is provided here.
 
 - feat: support app search even if Spotlight is disabled #1028
 - feat: read localized names from root InfoPlist.strings #1029
+- feat: add deep research report workflow and viewer #1074
 
 ### 🐛 Bug fix