fix(talk_app): Add missing read-only and chat permissions checks for reactions and message input

[provokateurin]

Fixes #2624

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 28.90%. Comparing base (3feb9de) to head (a511491).
Report is 8 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2656   +/-   ##
=======================================
  Coverage   28.90%   28.90%           
=======================================
  Files         371      371           
  Lines      136616   136622    +6     
=======================================
+ Hits        39484    39490    +6     
  Misses      97132    97132           

Flag	Coverage Δ		*Carryforward flag
account_repository	98.47% <ø> (ø)
cookie_store	99.48% <ø> (ø)		Carriedforward from 3feb9de
dashboard_app	96.05% <ø> (ø)
dynamite	31.05% <ø> (ø)		Carriedforward from 3feb9de
dynamite_end_to_end_test	61.69% <ø> (ø)		Carriedforward from 3feb9de
dynamite_runtime	85.40% <ø> (ø)		Carriedforward from 3feb9de
interceptor_http_client	97.18% <ø> (ø)		Carriedforward from 3feb9de
neon_dashboard	96.05% <ø> (ø)		Carriedforward from 3feb9de
neon_framework	61.43% <ø> (ø)
neon_http_client	94.32% <ø> (ø)		Carriedforward from 3feb9de
neon_notifications	100.00% <ø> (ø)		Carriedforward from 3feb9de
neon_storage	94.66% <ø> (ø)		Carriedforward from 3feb9de
neon_talk	99.45% <ø> (ø)		Carriedforward from 3feb9de
nextcloud	24.33% <ø> (ø)		Carriedforward from 3feb9de
notifications_app	97.40% <ø> (ø)
notifications_push_repository	98.11% <ø> (ø)
sort_box	90.90% <ø> (ø)		Carriedforward from 3feb9de
talk_app	99.01% <100.00%> (+<0.01%)	⬆️

*This pull request uses carry forward flags. Click here to find out more.

Files with missing lines	Coverage Δ
...ramework/packages/talk_app/lib/src/pages/room.dart	100.00% <100.00%> (ø)
...ork/packages/talk_app/lib/src/widgets/message.dart	98.80% <100.00%> (+<0.01%)	⬆️
...k/packages/talk_app/lib/src/widgets/reactions.dart	100.00% <100.00%> (ø)

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