refactor(state): improve use of state helpers

[sudo-tee]

No description provided.

[Copilot]

Pull request overview

This PR refactors state mutations across the codebase to rely more consistently on state “domain” helpers and introduces batching/in-place mutation helpers in the state store to reduce direct state manipulation and consolidate multi-key updates.

Changes:

• Add state.store.batch() and state.store.mutate() and refactor existing mutations to use them (plus new unit tests).
• Introduce higher-level state helpers (e.g. ui.set_code_context, ui.mark_windows_hidden, renderer.reset, renderer.set_stats) and update call sites.
• Harden the minimal test init by stubbing Treesitter via pcall(require, 'vim.treesitter').

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
tests/unit/state_spec.lua	Adds coverage for batch() notification deferral and mutate() emitting behavior.
tests/minimal/init.lua	Changes Treesitter stubbing approach for tests.
lua/opencode/ui/ui.lua	Replaces direct window-state mutation with state.ui.* helpers.
lua/opencode/ui/renderer.lua	Consolidates renderer state reset and uses new helpers for permission updates and stats updates.
lua/opencode/ui/autocmds.lua	Uses state.ui.set_code_context() instead of two separate setters.
lua/opencode/state/ui.lua	Adds set_code_context() and mark_windows_hidden(); batches some multi-key resets.
lua/opencode/state/store.lua	Introduces batching + in-place mutation helpers; refactors set/append/remove accordingly.
lua/opencode/state/session.lua	Batches session activation/clear; adds message count increment and silent update helper.
lua/opencode/state/renderer.lua	Adds pending-permissions mutator helper, combined stats setter, and renderer reset.
lua/opencode/state/model.lua	Adds batched clear() and refactors mode->model override update.
lua/opencode/state/jobs.lua	Adds set_server_port() helper.
lua/opencode/state/init.lua	Minor type/comment tweak.
lua/opencode/state/context.lua	Adds update_current_context_config() helper.
lua/opencode/state.lua	Updates module type annotation.
lua/opencode/server_job.lua	Adjusts server port update logic during local spawn readiness.
lua/opencode/image_handler.lua	Removes redundant context_updated_at update after delegating to context module.
lua/opencode/core.lua	Uses new model clear helper and consolidated UI code-context setter.
lua/opencode/context.lua	Uses in-place config mutation helper; removes redundant context_updated_at updates.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.