* perf(app): optimize wrapped measurements and checkpoint native layout experiment
Compute full grapheme geometry only for final wrap fragments. Preserve shaped-text search behavior while bounding additive wrap probes. Keep the Android background layout experiment isolated from the normal diff renderer; native renderer integration and iOS bindings remain unfinished.
* perf(server): reduce cold diff generation work
Keep active diff reads owned across invalidation and wait for the initial watcher inventory before cold generation. Batch patch and blob reads while preserving per-file size isolation, bounded output, and daemon responsiveness. Avoid constructing fallback tokens when full-file highlighting already covers both sides.
* test(server): exercise oversized highlighted diff rejection
The single-line fixture now bypasses highlighting under the long-line guard, so it no longer reaches the structured payload limit. Use short dense lines to keep testing oversized rejection and continued socket usability.
* fix(server): queue fresh diffs for forced reads
A forced request following a repository mutation must not reuse an older active build. Invalidate that result and coalesce waiting callers onto one subsequent build. Give the cache a named object input and completed-value type.
* test(server): share deferred diff loader setup
* test(server): name completed diff cache setup
* refactor(server): use aliases for new diff imports
* fix(server): keep shipped diff imports resolvable by Node
The TypeScript build preserves path aliases without a runtime resolver. Restore relative imports for shipped code and declarations, and correct the server import guideline that prompted the regression.
* perf(app): reduce avoidable work when opening large diffs
Large snapshots were recursively reconstructed for reference stability, while native scroll worklets captured complete file models. Preserve identity at the data producers and prepare text for the visible window without rebuilding unchanged files.
* test(app): await commit diff query completion without polling
* chore(app): remove profiling artifacts from the source tree
* perf(app): keep large diffs responsive
Render file headers on the canvas and bound expensive text shaping to the active viewport while preserving sticky, hover, and horizontal-scroll behavior. Let native scroll cancellation arbitrate header presses so finger scrolling cannot expand files.
* test(app): assert canvas diff header accessibility
* test(app): assert canvas diff header semantics
Reuse measured diff geometry when review controls open, keeping the interaction responsive on large changes. Preserve complete tab-track snapshots while exact content widths settle so new tabs and retained workspaces do not flash or truncate.
Keep diff headers and painted content on the same scroll clock while preserving native scrolling and independent per-file horizontal offsets.
Complete review, selection, typography, tree, and palette parity without returning line rendering to React.
Mohamed Boudra