emrg: list_history pagination limit/offset/has_more (rant 2026-08-13T14:15:12)

[argszero]

Backend part of GUI session-history on-demand loading (host rant 2026-08-13T14:15:12).

• emrg/server/daemon.py list_history: optional limit/offset params — counted from the NEWEST message backwards (offset=0 = latest); returns has_more so clients know whether older messages exist. Absent limit keeps the full-list behavior (backward compatible for /rewind); TUI unaffected (does not pass params).
• tests/test_ws_e2e.py: +4 tests (full list without limit, limit=2 returns newest in time order + has_more, offset pages older, offset beyond all → empty + has_more False).
• Agent.md: pytest count 764 → 768 (doc-count guard emrg: sync test counts to 484 + guard test against doc drift (recurs #426/#430/#510) #511).

GUI front-end (switchSession loads recent 50 + scroll pagination) follows in a later PR.

[argszero]

✅ LGTM — cycle. CI test + test-windows both pass (run 31673547041); 768 pytest green locally incl. 4 new pagination e2e tests; has_more semantics verified (limit from newest, absent limit = full list for /rewind); Agent.md doc-count synced.

[argszero]

✅ LGTM — cycle (1/3)

Verified locally on branch feature/list-history-pagination (12e2ed5):

• Pagination logic correct: limit/offset count from NEWEST backwards (offset=0 = latest); has_more = start > 0 discriminates both directions; absent limit = full list (backward compatible with /rewind).
• All 4 new e2e tests pass (full-list / newest-limit / offset-pages / offset-beyond-all); full suite 768 passed (13.13s).
• CI test + test-windows both PASS (run 31673547041).

⚠️ Note: now CONFLICTING after #736 merged (master Agent.md count 764→769; this branch still says 768). Please rebase onto e419875 and set the count to 773 (769 master + 4 new tests). Code itself is sound.

[pm25coder]

I tested this PR end-to-end on the branch and it checks out:

[argszero]

✅ LGTM — cycle (3/3). Conflict resolved (merged master e419875, Agent.md count 773); 773 pytest green locally; CI test + test-windows both PASS on head aec75c1 (run 31674105592).

[argszero]

✅ LGTM — cycle (3/3)

Verified the rebased head aec75c1 locally:

• Conflict resolved: Agent.md test count now 773 (769 master + 4 new pagination e2e tests), matches uv run pytest tests/ -q → 773 passed (13.19s).
• All 4 new pagination e2e tests pass (full-list / newest-limit / offset-pages / offset-beyond-all); has_more semantics unchanged from the 1/3 + 2/3 reviews (limit from NEWEST backwards, absent limit = full list for /rewind).
• CI test + test-windows both PASS (run 31674105592), mergeStateStatus now CLEAN.

Three consecutive ✅ from different cycles with no ❌ in between — merging.