feat: join independent wall junctions

Issue: #141
User-Visible: yes

docs/ARCHITECTURE.md

@@ -318,6 +318,16 @@ physical bodies are unioned with room walls for rendering and light occlusion,
 and subtracted from clean room floor area. Openings (doors, windows and gates)
 still belong only to derived room walls and never cut an independent object.
 
+Independent linear objects have two deliberate projections. Raw flat-capped
+quads preserve source identity for hit/selection/drag/properties/delete/history
+and furniture magnet behaviour. `physicalBodySet()` also derives exact
+endpoint↔endpoint and endpoint↔line topology, adds bounded mitre/bevel patches
+without persisted nodes or segment splits, and exposes the joined geometry to
+presentation and physics. Degree-one caps remain flat; an interior X crossing
+is only a boolean overlap. The full card caches this structural frame by
+space/config geometry, while static cards use a weak server-snapshot cache;
+cursor and HA state updates do not repeat the saved O(N²) node search.
+
 Rooms may not overlap
 (`pointStrictlyInside` + `roomsOverlap`; being ON a shared wall is legal — real neighbouring
 walls overlap collinearly rather than match exactly). **Merge/Split** use boolean geometry from
@@ -334,7 +344,10 @@ before the shell is restored. Consequently a Split edge ending at an exterior
 vertex cannot contribute a child-room mitre to the facade. Per-room rings remain
 an interior join/nested-room representation, and atomic quads provide a safe
 physical interval when an acute child ring cannot be subtracted. Paper and
-masonry paths are emitted by that same geometry pass. The full card retains the
+masonry paths are emitted by that same geometry pass. Computed independent
+junction patches enter as extras only after room opening cuts, so an opening
+cannot cut a coincident partition and room exterior authority remains intact.
+The full card retains the
 pair in `_wallUnionCache`; static cards retain it in a weak server-snapshot
 cache guarded by a structural geometry fingerprint. This is computed render
 state only: it never rewrites rooms or wall entries, and an HA state tick does

docs/CHANGELOG.md

@@ -2,6 +2,12 @@
 
 ## Unreleased
 
+- Connected Room outline and Partition segments now form one seamless thick
+  wall immediately, including the live rubber-band. Right and oblique corners
+  use bounded mitre/bevel joins, T-connections have no visible butt face, each
+  segment keeps its own thickness, and free ends remain flat consistently in
+  Plan, View, static cards, hidden isometric, clean-floor and light geometry
+  ([#141](https://github.com/Matysh/houseplan-card/issues/141)).
 - Room outline and Partition drawing now shows wall centre lines and exact
   endpoints above existing walls. The enlarged target previews whether the
   next click will join an endpoint or create a wall-bound T-connection, while

docs/CHANGELOG.ru.md

@@ -8,6 +8,12 @@
 
 ## Unreleased
 
+- Соединённые отрезки «Контура комнаты» и «Перегородки» теперь сразу, включая
+  активный rubber-band, образуют одну бесшовную толстую стену. Прямые и косые
+  углы получают ограниченный mitre/bevel, T-соединение не показывает торец,
+  каждый отрезок сохраняет свою толщину, а свободные концы остаются плоскими в
+  Plan, View, статичной карточке, скрытой изометрии, чистой площади и световой
+  геометрии ([#141](https://github.com/Matysh/houseplan-card/issues/141)).
 - При рисовании инструментами «Контур комнаты» и «Перегородка» поверх
   существующих стен теперь видны их осевые линии и точные конечные узлы.
   Увеличенная точка заранее показывает соединение с концом стены или создание

docs/ISOMETRIC.md

@@ -53,6 +53,11 @@ physical bodies have been resolved. It normalizes outer/hole winding, builds one
 evenodd top path and at most one visible side per ring edge, then uses a stable
 depth/order tie-break. Complexity is O(E) in canonical ring edges.
 
+For connected drafts and partitions those extras already contain computed
+bounded junction patches. Isometric wall tops/sides therefore use the same
+seamless L/T footprint as flat full/static cards; raw per-record rectangles are
+reserved for editor identity and never projected as competing wall faces.
+
 The content fingerprint includes rooms, wall geometry/thickness, open cuts,
 openings, partitions, drafts, columns, scale/grid inputs, camera, wall height and
 algorithm version. It deliberately excludes `_cfgEpoch`, HA state, hover and

docs/LIGHT.md

@@ -26,7 +26,9 @@ plan geometry and shares it between every lamp in the space.
 
 - the wall bodies exactly as the plan draws them (`wallBodiesGeometry`), with
   their real thickness and mitred junctions;
-- independent bodies: partitions, columns, room drafts;
+- independent bodies: partitions, columns and room drafts. Exact connected
+  draft/partition segments enter as one joined volume, not as raw rectangles
+  whose former butt faces could become false barriers;
 - the bare outline of any room edge that carries no thickness — a wall is still
   a wall when it is drawn as a line.
 
@@ -107,6 +109,12 @@ set is invisible — the plan simply keeps lighting through a wall that now
 exists. The same fingerprint, plus position and radius, keys the per-source
 region cache (`_glowClipCache`).
 
+The masonry boolean receives room walls after passage cuts plus the cached
+joined independent body set. Its outer/hole rings are the authoritative
+barriers for both visibility and the fail-dark source guard. A boolean failure
+falls back to the raw independent bodies as opaque obstacles; it never turns a
+malformed wall transparent.
+
 ## Source, state and service identity
 
 The geometry above consumes `resolvedLightSources()`; it never discovers light

docs/STATUS.md

@@ -22,7 +22,7 @@ metadata). Only an explicit owner-approved emergency hotfix may skip this gate.
 | Item | State |
 |---|---|
 | Version | **v1.64.0-beta.1** everywhere (manifest, const.py, package.json, CARD_VERSION) — prerelease candidate on the v1.63.0 stable base |
-| Current local cycle | v1.64.0-beta.1 packages the merged #122 hidden isometric Stage 2, #131 read-only cold-start fix and #107 persistent virtual-light toggles. The independent #124 exact-SHA view-toggle performance debt remains open under the owner's accepted exception. |
+| Current local cycle | v1.64.0-beta.1 packages the merged #122 hidden isometric Stage 2, #131 read-only cold-start fix and #107 persistent virtual-light toggles. Issue #141 is in implementation on its issue branch: connected draft/partition L and T nodes now use one computed joined wall volume across flat/static/hidden-iso, clean-floor and light consumers while raw objects retain editor identity; Linux smoke/golden/performance remain pre-release gates. The independent #124 exact-SHA view-toggle performance debt remains open under the owner's accepted exception. |
 | Hidden Labs Stage | #89 Stage 1 ships in v1.63.0-beta.1. #122 Stage 2 is included in the v1.64.0-beta.1 candidate and evolves the same hidden, expiring `iso` experiment with matte walls, a low exterior floor edge, restrained shared shadows and live vertical door/window/gate panels. Flat remains default; editors and `houseplan-space-card` remain flat; live floor effects and HA actions remain unchanged. Public activation is explicitly a separate task. |
 | Workflow | Owner's rule since 2026-08-07: ordinary fixes/features are made **locally, without tests and without commits**. A requested pre-release gets a production build plus the smallest targeted unit/smoke set covering the changed surfaces, one tested `dev` commit/tag and a GitHub Release with `prerelease=true`; `main` stays untouched. The complete local frontend/backend/smoke gate runs only before a stable release, after which `main` is fast-forwarded to the exact tested `dev` SHA and the GitHub Release uses `prerelease=false`. Release bodies are short and bilingual (Russian first): only significant user changes get individual bullets, while minor/code-only work is grouped as `Мелкие исправления и улучшения` / `Small fixes and improvements`; every body ends with separate links to the Russian and English changelogs. Detailed RU/EN changelog bullets may link the corresponding closed GitHub Issues; open or partially delivered issues are never presented as shipped. Telegram announcements are sent only for stable releases; beta and RC publication is silent. `docs/RELEASE-NOTES.md` is the current canonical body instance; `npm run release:prerelease -- <tag> --issues=… --yes` is the primary local publication path and the manual `Publish prerelease` workflow is its GitHub-only equivalent once present on `main`. Nothing is copied to the home instance by hand |
 | GitHub | https://github.com/Matysh/houseplan-card — [Issues](https://github.com/Matysh/houseplan-card/issues) are the canonical task records; their labels carry priority and workflow status (`PROCESS.md` §9). GitHub Projects is no longer used. `main` carries stable releases; pre-release tags may point directly at `dev`. Work lands on `dev` and is merged into `main` for a stable release, so `dev` is normally equal to or ahead of `main`, never behind. Push via SSH key `ha_jb` (remote git@github.com:…); API releases via the fine-grained PAT in `~/.git-credentials` (Contents R/W, issued 2026-07-23) |

docs/TESTING.md

@@ -2089,6 +2089,16 @@ require hands on real hardware — they remain for the human pass.
       source inside masonry lights nothing. Window rays are blocked by the same
       bodies. `show_borders: false` changes paint only [auto:
       physical-geometry.test; manual visual].
+- [ ] **Seamless junctions**: saved draft/partition L corners (right, acute and
+      obtuse), unequal thickness, endpoint-on-line T and a branch touching a
+      room wall use one bounded joined body; near-miss, X crossing, malformed
+      segments and flat free caps keep their documented semantics. The active
+      rubber-band has the same contour before and after commit, target records
+      are not split, Plan/View/static/hidden-iso paths agree, clean floor and
+      light use the joined corner, and preview/render never writes config
+      [auto: wall-thickness.test, physical-geometry.test,
+      smoke_wall_junctions, wall-junctions golden scenarios; manual golden
+      artifact review].
 - [ ] **Lifecycle/performance**: an external config revision cancels live
       move/rotate state before replacing geometry. Drag preview performs no
       polygon boolean work; clean floor and Glow clips are reused until the

docs/USER-GUIDE.ru.md

@@ -275,6 +275,13 @@ desktop: для точного рисования, Resize, модификато
 предпросмотра рекомендуется редактор на компьютере; tap на сенсорном экране
 тоже выполняет привязку, но отдельный hover до касания не показывается.
 
+Толстые отрезки, соединённые в такой точке, сразу показываются как одна стена:
+прямые и косые углы получают ограниченный mitre/bevel без зуба или щели, а
+T-соединение входит в проходящую стену без видимого торца. Это действует уже у
+активного rubber-band до клика и сохраняется после клика, в View и на статичной
+карточке. Толщина каждого ранее поставленного отрезка остаётся своей; свободный
+конец незамкнутой стены остаётся плоским.
+
 Каждый законченный отрезок незамкнутого контура сохраняется сразу. В той же
 сессии инструмент продолжит его автоматически; после перезагрузки выберите
 кликом один из концов. Замкнутый контур можно сохранить как комнату или выбрать
@@ -345,6 +352,7 @@ Glow и солнечные лучи, но при Resize комнаты оста
 | Общая стена | Одна физическая стена между комнатами |
 | Чистая площадь | Считается по внутренней грани стен |
 | Углы | Соседние тела стен соединяются; на малом масштабе штриховка скрывается, тело остаётся |
+| Независимые стыки | Контуры и перегородки с точным общим узлом образуют один ограниченный mitre/bevel; T-стык не дробит исходную стену |
 | Соседние одинаковые участки | Нормализуются в один участок при редактировании/оптимизации |
 | Виртуальный участок | Не имеет тела и толщины; реальные остатки сохраняют свою толщину |
 

docs/WALL-THICKNESS.md

@@ -65,6 +65,15 @@ thinner than 3 CSS px on screen, the shared full/static render policy suppresses
 only the hatch so it does not collapse into noise; the solid fill remains. Mitre
 joins; bevel when the mitre spike exceeds `MITRE_LIMIT × thickness`.
 
+Independent draft/partition segments keep flat raw quads for editor identity,
+but exact endpoint↔endpoint and endpoint↔line nodes add computed join patches
+before the presentation union. Each incident ray keeps its own half-depth;
+ordinary corners use the same bounded `MITRE_LIMIT = 4` rule and excessive
+spikes become bevels. A degree-one endpoint receives no patch and therefore
+keeps its flat cap. This topology is render-only: a T does not split or rewrite
+the saved target segment. The live open-outline/rubber-band preview calls the
+same primitive with saved per-segment thicknesses plus the current field value.
+
 Openings cut the body full-depth; jambs cap the cut; window glass mid-tunnel;
 door swing from the **inner face**. Association uses wall direction ≈ opening
 angle (mod 180°), then nearest span — never a perpendicular neighbour at a T.
@@ -167,3 +176,13 @@ occlusion even when borders are hidden. A source inside/on a physical body is
 fully occluded instead of leaking around its own masonry. The same fail-dark
 placement rule applies to window tunnels and exterior door/gate openings;
 interior passages remain valid source positions (#92).
+
+`physicalBodySet()` separates raw draft/partition/column bodies from computed
+junction patches and their joined geometry. Raw bodies remain authoritative for
+hit testing, selection, drag, properties, deletion, history and furniture
+magnet semantics. Flat full/static render, hidden isometric, clean floor, Glow,
+sun and source placement consume the joined set through the canonical masonry
+pass, so an old butt face cannot become a visible seam or a false light barrier.
+Exact near-misses remain separate, an interior↔interior X crossing keeps normal
+boolean-union semantics, and malformed legacy segments fall back opaque without
+writing configuration.