…5115)

* Bump ReportGenerator from 5.5.5 to 5.5.6

---
updated-dependencies:
- dependency-name: ReportGenerator
  dependency-version: 5.5.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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* Update Examples link in README.md (#5104)

* Reframe layout docs around responsive UI and instructional style (#5110)

* Initial plan

* docs: reframe layout docs around responsive UI

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* docs: polish responsive layout wording

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* docs: tighten instructional sentence style

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* docs: fix remaining instructional prose

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* Fixes #5114. Remove main from publish branch triggers; use tags only

Main branch pushes were triggering the publish workflow without a release
tag, causing GitVersion to produce invalid NuGet versions (e.g. 2.0.0-5420).

- Remove main from branches trigger; stable releases now publish only on v* tag push
- Develop branch pushes continue publishing pre-release packages automatically
- Update template dispatch conditions to match tag-based flow

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… only (gui-cs#5115)

* Bump ReportGenerator from 5.5.5 to 5.5.6

---
updated-dependencies:
- dependency-name: ReportGenerator
  dependency-version: 5.5.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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* Update Examples link in README.md (gui-cs#5104)

* Reframe layout docs around responsive UI and instructional style (gui-cs#5110)

* Initial plan

* docs: reframe layout docs around responsive UI

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* docs: polish responsive layout wording

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* docs: tighten instructional sentence style

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* docs: fix remaining instructional prose

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* Fixes gui-cs#5114. Remove main from publish branch triggers; use tags only

Main branch pushes were triggering the publish workflow without a release
tag, causing GitVersion to produce invalid NuGet versions (e.g. 2.0.0-5420).

- Remove main from branches trigger; stable releases now publish only on v* tag push
- Develop branch pushes continue publishing pre-release packages automatically
- Update template dispatch conditions to match tag-based flow

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

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* Fixes #5114. Remove main from publish branch triggers; use tags only (#5115)

* Bump ReportGenerator from 5.5.5 to 5.5.6

---
updated-dependencies:
- dependency-name: ReportGenerator
  dependency-version: 5.5.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

* Update Examples link in README.md (#5104)

* Reframe layout docs around responsive UI and instructional style (#5110)

* Initial plan

* docs: reframe layout docs around responsive UI

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* docs: polish responsive layout wording

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* docs: tighten instructional sentence style

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* docs: fix remaining instructional prose

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* Fixes #5114. Remove main from publish branch triggers; use tags only

Main branch pushes were triggering the publish workflow without a release
tag, causing GitVersion to produce invalid NuGet versions (e.g. 2.0.0-5420).

- Remove main from branches trigger; stable releases now publish only on v* tag push
- Develop branch pushes continue publishing pre-release packages automatically
- Update template dispatch conditions to match tag-based flow

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

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* Release v2.0.1 (#5116)

* Update Examples link in README.md (#5104)

* Reframe layout docs around responsive UI and instructional style (#5110)

* Initial plan

* docs: reframe layout docs around responsive UI

* Fix XML comment has cref attribute 'Buttons' that could not be resolved CS1574 (#5118)

* docs: tweak hero gif stats per #5108 (#5121)

Co-authored-by: Tig <tig@users.noreply.github.com>

* Fixes #5088 - Margin Shadow sizing wrong (#5101)

* Add tests for ShadowStyle inheritance and reset behavior

Added two unit tests to ShadowTests.cs:
- ShadowStyle_Getter_Does_Not_Inherit_From_SuperView ensures a child view does not inherit ShadowStyle from its SuperView and that round-tripping the property does not create a MarginView or add shadow thickness.
- Setting_ShadowStyle_Null_Resets_ShadowSize verifies that setting ShadowStyle to null resets the MarginView's ShadowSize to Size.Empty, preventing residual state.

* Fixes #5088 - Changed Margin.ShadowStyle to only use the local value and reset ShadowSize to Size.Empty when unset. Adjusted related tests to match new behavior.

Refactored ShadowStyleDemo window and editor initialization for clarity and consistency, updated shadow window positioning and scheme usage, and improved child view arrangement.

* Update Tests/UnitTestsParallelizable/ViewBase/Adornment/ShadowTests.cs

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Fixes #5072. TableView reserves space for later columns when laying out (#5083)

* Fixes #5072. TableView reserves space for later columns when laying out

A wide column (e.g. a long Description) previously consumed all available
viewport width and pushed subsequent columns off-screen. Each visible
column now reserves at least its header width (or configured MinWidth)
during layout so wide columns are clamped instead of starving later
columns.

The reservation only inspects column headers and styles — it never
iterates cell rows — so paginated or very large ITableSource
implementations remain performant.

* Tighten TableView column-bounds test to use strict inequality

Right-edge check now uses < Viewport.Width instead of <= per code review.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* Restore foreach loop in TableView.CalculateContentSize

Use a manual index counter rather than converting the loop to for, and
revert the unrelated borderWidth local-variable extraction. The fix only
needs the index to compute the slice of remaining columns to reserve
space for.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* Updated table col width calculation and added wide example

* Fixed tests and updated comment wording based on copilot pr feedback

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-authored-by: Tig <tig@users.noreply.github.com>

* Fixes #5119. Popover isn't recalculating it's position when terminal is resizing (#5120)

* Fixes #5119. Popover isn't recalculating it's position when terminal is resizing

* Add one more unit test for popover screen resize

* Fix unit test

---------

Co-authored-by: Tig <tig@users.noreply.github.com>

* Fixes #5122. Visible popovers are always layout and redrawn in every iteration unnecessarily. (#5123)

* Fixes #5075. TableView ShowVerticalCellLines renders incorrectly with custom ColorGetter (#5128)

* Fixes #5075. TableView ShowVerticalCellLines=false renders incorrectly with custom ColorGetter

When ShowVerticalCellLines is false and a ColumnStyle.ColorGetter is in use
(e.g. FileDialog), the 1-char gap between cells retained the row scheme's
attribute, producing visible "stripes" through custom-colored cells.

TruncateOrPad intentionally renders cells to (Width - 1) chars, leaving 1
char for the cell boundary. RenderRow now extends the cell's own background
into that gap when the separator is the default invisible space.
RenderSeparator skips drawing in the same case (RenderRow owns the gap).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* FileDialog: use ShowVerticalCellLines=false now that #5075 fix is in.

Per PR review on #5128, switch FileDialog's TableView to render without
vertical cell lines so its custom ColorGetter (file-type colors) shows
through cleanly. The TableView fix in this PR ensures the 1-char gap
between cells now picks up the cell's own background instead of the
row scheme's, so removing the lines no longer leaves color stripes.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-authored-by: BDisp <bd.bdisp@gmail.com>

* Fixes #5132. TableView Home/End navigation with FullRowSelect (#5133)

* Fixes #5068. TableView appends ellipsis indicator when cell content is truncated (#5129)

* Reverts #5133. Revert TableView Home/End FullRowSelect change (#5136)

* Revert "Fixes #5132. TableView Home/End navigation with FullRowSelect (#5133)"

This reverts commit 6361f3368.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Docs: Document Home/End rebinding for FullRowSelect in TableView

Adds a tip to the FullRowSelect section showing how to rebind Home/End
to Command.Start/Command.End for row-level navigation, referencing the
UICatalogRunnable pattern.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

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* Fixes #5130. Fix OutputBufferImpl race condition on Contents reference (#5131)

* Adds concurrency test for OutputBufferImpl race condition

Adds AddStr_And_ClearContents_Concurrent_DoesNotThrow test that
reproduces the race condition in OutputBufferImpl where ClearContents
replaces the Contents reference while AddStr is concurrently iterating.

See #5130.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Adds concurrency tests, benchmark, and plan for #5130

- Expanded OutputBufferImplConcurrencyTests with 4 tests covering:
  AddStr+ClearContents, FillRect+ClearContents, Move+AddStr+ClearContents,
  and a three-way concurrent test
- Added OutputBufferBenchmark for perf baseline (AddStr, FillRect,
  ClearContents, SetSize, TypicalDrawCycle)
- Added implementation plan in plans/

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Refactor OutputBufferImpl for thread safety

Replaced locking on Contents with a dedicated _contentsLock object to ensure safe concurrent access to buffer state (Contents, DirtyLines, Clip, etc.). Refactored buffer management methods (ClearContents, SetSize, FillRect, Move, IsValidLocation) to use the new lock. Updated FillRect and AddGrapheme to avoid race conditions. Improved documentation and comments for concurrency. Moved SetCellUrl/GetCellUrl implementations under the lock. In OutputBufferImplConcurrencyTests, reordered and moved helper methods for clarity; no test logic changes. No public API changes, but internal concurrency is now robust.

* Refactor StringExtensions for style and consistency

Refactored methods to use expression-bodied members and improved code style (constants, variable declarations, and formatting). Added and then removed `IsSurrogatePair` and `MakePrintable` extension methods, resulting in no net functional changes. All updates are stylistic and organizational.

* Fix race condition in FillRect(Rectangle, char) overload

The char overload called Move() + AddRune() without holding _contentsLock,
allowing concurrent threads to corrupt Col/Row between the two calls and
write characters to wrong positions.

Fix: delegate to FillRect(Rectangle, Rune) which holds the lock atomically.

Added test proving the race (detected wrong-position writes in <13ms before fix).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Added null check in OutputBufferImpl.cs WriteGrapheme. Introduced locking in RuneExtensions.cs for thread-safe Unicode width calculation.

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: BDisp <bd.bdisp@gmail.com>

* Fixes #5137 - BREAKING CHANGE - Rename `TableSelection.Cursor` to `TableSelection.SelectedCell` (#5142)

* Initial plan

* Rename TableSelection.Cursor to TableSelection.SelectedCell

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---------

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* Fixes #5145. ReadOnly TextView mouse selection still cannot include final character in v2.0.1 (#5146)

* Fixes #5137. Add custom header styling for TableView (#5138)

* Initial plan

* Add custom header styling for TableView (Options B+C)

- Add HeaderColorGetterArgs class for contextual header color info
- Add HeaderColorGetterDelegate for per-column header color override
- Add ColumnStyle.HeaderColorGetter property
- Add TableStyle.HeaderScheme property for global header scheme
- Update RenderHeaderMidline to apply header styling
- Update CharacterMap scenario to italicize sorted column header
- Add unit tests for both per-column and global header styling

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---------

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* Fixes #5112. AOT config warning cleanup (#5134)

* Fix NativeAOT configuration cloning and warning cleanup

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix config converter regressions and serialization cleanup

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove stale AOT propagation annotations

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix NativeAOT configuration cloning and warning cleanup

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix config converter regressions and serialization cleanup

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove stale AOT propagation annotations

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix PR 5134 config review feedback

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Simplify AttributeJsonConverter style parsing

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Correctly serialize null properties in ScopeJsonConverter

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Tig <tig@users.noreply.github.com>

* Fixes #5149. Improve DropDownList keyboard use when closed (#5151)

* Initial plan

* Improve DropDownList keyboard: Space to open, Up/Down to navigate, CollectionNavigation support

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* Address code review: split compound conditions into separate guard clauses

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* Code cleanup

---------

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* Fixes #5157. Add `RunAsync(IRunnable, CancellationToken)` (#5159)

* Fixes #5158. Refactor `FileDialog` base type from Dialog to Dialog<IReadOnlyList<string>?> (#5160)

* Fixes #5103. Disable NerdFonts default in FileDialogExamples scenario (#5150)

* Initial plan

* Fixes #5103. Disable NerdFonts default in FileDialogExamples scenario

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---------

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Co-authored-by: tig <585482+tig@users.noreply.github.com>
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* fix: Key.Equals honors GetHashCode contract; drops Handled from identity (#5170) (#5179)

Key.Equals(object?) included Handled in the comparison while GetHashCode
returned only _keyCode.GetHashCode(), violating the .NET contract that
equal objects must have equal hash codes. This broke KeyBindings (a
ConcurrentDictionary<Key, KeyBinding>) when Handled flipped between
storing and lookup.

Handled is per-event state, not part of binding identity, so it is
removed from the equality comparison. KeyEqualityComparer already used
KeyCode-only equality and is consistent.

Two existing tests in KeyTests.cs that asserted the buggy behavior
(Equals_ShouldReturnTrue_WhenEqual and
Equals_Handled_Changed_ShouldReturnFalse_WhenNotEqual) have been
updated to assert the correct contract-honoring behavior.

https://claude.ai/code/session_01CdoS4YQ7v9aNPZaNsYnxjv

Co-authored-by: Claude <noreply@anthropic.com>

* docs: clarify AI test markers — // Claude and // CoPilot are both acceptable (#5189)

CLAUDE.md and .claude/rules/testing-patterns.md disagreed on the AI marker
convention (one said "// Claude - Opus 4.5", the other "// CoPilot - ChatGPT v4").
Empirically both are used: Tests/UnitTestsParallelizable + Tests/UnitTests.NonParallelizable
contain ~105 files with "// Claude" markers and ~93 with "// CoPilot". Update both
guidance files to list the two forms as equally acceptable and tell reviewers not to
flag inconsistency between them. Triggered by Copilot review nits across PRs #5177-#5188.

https://claude.ai/code/session_01CdoS4YQ7v9aNPZaNsYnxjv

Co-authored-by: Claude <noreply@anthropic.com>

* fix: UnixRawModeHelper safe restore on crash + valid-state guard (#5164) (#5186)

* fix: UnixRawModeHelper safe restore on crash + valid-state guard (#5164)

When the input thread crashes before the driver Dispose() runs, the Unix
terminal is left in raw mode and the user's shell is left unusable.

This change adds three safety nets so the original termios is restored on
any abnormal exit path:

- Finalizer: last-resort restore if Dispose() is bypassed (e.g. fatal
  native crash, immediate process abort).
- AppDomain.ProcessExit hook registered after a successful TryEnable;
  unregistered in Dispose() to avoid leaking the helper for the lifetime
  of the process.
- Console.CancelKeyPress hook so Ctrl+C also restores cleanly.

Also adds a _haveSavedTermios guard so Restore() is a hard no-op unless
tcgetattr previously succeeded - preventing an uninitialized termios
struct from ever being written back to the terminal.

Tests in UnitTests.Parallelizable cover:
- Restore() without TryEnable() is a no-op and does not throw.
- Restore() is idempotent.
- Dispose() without TryEnable() is a no-op and double-Dispose is safe.
- The type has a finalizer (last-resort restore contract).
- TryEnable() failure paths leave _haveSavedTermios = false.

The full crash-during-input-thread scenario is integration-only (requires
a real tty); the unit tests cover the observable contract.

https://claude.ai/code/session_01CdoS4YQ7v9aNPZaNsYnxjv

* fix: check tcsetattr return; document CancelKeyPress limitation (#5164)

Address Copilot review feedback on PR #5186:

- Restore() and the finalizer now check the tcsetattr return code. On
  non-zero return, log the errno via the existing Logging infrastructure.
  Restore() leaves IsRawModeEnabled set to true when the syscall fails so
  callers and the finalizer know the terminal was not restored. The
  finalizer logs only and never throws.
- Document the Console.CancelKeyPress limitation: with ISIG disabled in
  raw mode, a keyboard Ctrl+C arrives as a 0x03 byte rather than SIGINT,
  so the hook is unlikely to fire while raw mode is active. The
  subscription remains as belt-and-braces defense for hosts that do not
  disable ISIG and for externally-delivered SIGINT events; the primary
  safety nets are AppDomain.ProcessExit and the finalizer.

https://claude.ai/code/session_01CdoS4YQ7v9aNPZaNsYnxjv

* fix: drop unreachable finalizer from UnixRawModeHelper (#5164 review)

The finalizer in UnixRawModeHelper was dead code: the instance is rooted
by its AppDomain.CurrentDomain.ProcessExit and Console.CancelKeyPress
event-handler subscriptions, so it can never become finalization-eligible
while those hooks are wired. Drop the finalizer and the now-unneeded
GC.SuppressFinalize call. Restoration relies on explicit Dispose as the
primary path with the ProcessExit hook as the safety net for normal
process exit; CancelKeyPress remains a best-effort fallback. Update the
class-level remarks and the obsolete reflection-based finalizer test
accordingly (6 tests -> 5).

https://claude.ai/code/session_01CdoS4YQ7v9aNPZaNsYnxjv

---------

Co-authored-by: Claude <noreply@anthropic.com>

* docs: clarify SessionBegun/SessionEnded as token lifecycle hooks (#5162) (#5188)

* docs: clarify SessionBegun/SessionEnded as token lifecycle hooks (#5162)

https://claude.ai/code/session_01CdoS4YQ7v9aNPZaNsYnxjv

* docs: tighten SessionBegun/SessionEnded XML accuracy (#5162)

Address Copilot review feedback on PR #5188 by aligning the
SessionBegun and SessionEnded XML docs with the actual ordering and
contract in ApplicationImpl.Begin/End.

- SessionBegun summary: describe the real firing point (after the
  token is pushed onto SessionStack and TopRunnable is set, but
  before IsRunningChanged/IsModalChanged fire) instead of "immediately
  after token construction".
- SessionEnded summary: drop "token-disposal hook"/"about to be
  released" framing; SessionToken is not IDisposable. Describe the
  real state (state has unwound, IsRunningChanged(false) has fired,
  Runnable is null) without overstating the SessionStack invariant
  (End only pops when wasModal && popped == token).
- Replace "manually dispose of the SessionToken" guidance in both
  remarks blocks with the actual caller responsibility: subscribe to
  SessionEnded and call End(SessionToken) themselves.
- End(SessionToken) remarks: replace "disposes the sessionToken" with
  "clears SessionToken.Runnable on sessionToken" to match the code.

https://claude.ai/code/session_01CdoS4YQ7v9aNPZaNsYnxjv

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: BDisp <bd.bdisp@gmail.com>

* fix: ApplicationImpl.Invoke throws NotInitializedException after Dispose (#5163) (#5185)

* fix: ApplicationImpl.Invoke throws NotInitializedException after Dispose (#5163)

Both `Invoke(Action)` and `Invoke(Action<IApplication>)` overloads
silently dropped actions when called before `Init()` or after
`Dispose()`: the thread-affinity fast path is skipped (no main thread
or top runnable) and the `TimedEvents.Add` fallback queues onto a
stopped queue.

Add an `Initialized` guard at the top of both overloads so the post-
Dispose / pre-Init case fails loudly with `NotInitializedException`,
matching the pattern already used by `Run(IRunnable, ...)` in the
same file.

The deeper thread-affinity race between the fast-path read of
`TopRunnableView` / `MainThreadId` and concurrent shutdown is
intentionally out of scope - that requires a redesign noted in the
issue and is not covered here.

https://claude.ai/code/session_01CdoS4YQ7v9aNPZaNsYnxjv

* fix: address review comments on Invoke disposed-throws (#5163)

- Pass nameof(Invoke) to NotInitializedException so the formatted
  "{member} cannot be accessed before Initialization" message is
  grammatically correct.
- Add ArgumentNullException.ThrowIfNull(action) to the non-generic
  Invoke(Action) overload so a null action fails deterministically
  (consistent with Begin/Run argument validation).
- Wrap Init in try/finally in the AfterDispose tests so a thrown
  Init does not leak the process-wide SynchronizationContext.

https://claude.ai/code/session_01CdoS4YQ7v9aNPZaNsYnxjv

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: BDisp <bd.bdisp@gmail.com>

* fix: ConcurrentDictionaryJsonConverter rejects duplicate keys (#5173) (#5181)

* fix: ConcurrentDictionaryJsonConverter rejects duplicate keys (#5173)

The Read implementation was calling TryAdd and ignoring its return value,
so duplicate keys in input JSON were silently dropped. Now throws a
JsonException on duplicate, mirroring the DictionaryJsonConverter fix.

https://claude.ai/code/session_01CdoS4YQ7v9aNPZaNsYnxjv

* style: normalize space-before-paren in ConcurrentDictionaryJsonConverter (#5173 review)

Apply project's space-before-paren convention to the Read method body,
matching DictionaryJsonConverter<T>. Addresses review feedback on
PR #5181 where the new TryAdd duplicate-key check used the convention
but adjacent calls in the same method body did not.

https://claude.ai/code/session_01CdoS4YQ7v9aNPZaNsYnxjv

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: BDisp <bd.bdisp@gmail.com>

* refactor: remove Region.DrawOuterBoundary debug API (#5168) (#5183)

Per maintainer feedback, DrawOuterBoundary was a debug helper added during
Region's development phase, not a supported public API. There are zero
internal callers across the framework (verified via grep); the only consumer
was the RegionScenario UICatalog demo, which now iterates GetRectangles()
and adds rectangle edges to the LineCanvas directly. Shared edges between
adjacent rectangles overlap; LineCanvas line-style joining handles the
visual result, matching how Border/Adornment already draw.

The 30+ structural smoke tests in DrawOuterBoundaryTests.cs are removed;
none used DriverAssert or verified visual output.

https://claude.ai/code/session_01CdoS4YQ7v9aNPZaNsYnxjv

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: BDisp <bd.bdisp@gmail.com>

* fix: KeyBindings preserves Key on bindings created via Add (#5171) (#5177)

The KeyBindings constructor passed a binding factory to CommandBindingsBase
that dropped the key parameter, calling `new KeyBinding(commands, source)`
where `source` was bound to the View? overload's target/data slot. Result:
every binding created via Add(key, ...) had Key = null and Target = null.

Forward the key (and explicit nulls for target/data) to the
(commands, key, source, target, data) constructor so KeyBinding.Key is
populated.

https://claude.ai/code/session_01CdoS4YQ7v9aNPZaNsYnxjv

Co-authored-by: Claude <noreply@anthropic.com>

* fix: Region.XOR computes correct symmetric difference (#5167) (#5178)

The XOR branch in Region.Combine mutated `this` via Exclude(region) and
then computed (region - this) against the already-mutated `this`,
producing a non-symmetric result. Snapshot both operands first and
compute (thisOriginal \ regionOriginal) ∪ (regionOriginal \ thisOriginal).

https://claude.ai/code/session_01CdoS4YQ7v9aNPZaNsYnxjv

Co-authored-by: Claude <noreply@anthropic.com>

* Fixes #issue. Correct AI guidance API entries for typed views and wrappers (#5191)

* Initial plan

* docs: correct AI API guidance for wrappers and typed values

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* Fixes #5148. Add selection and copy-to-clipboard to Markdown view (#5152)

* Initial plan

* Add selection, copy, and context menu to Markdown view

- Add MarkdownView.Selection.cs with selection state, SelectAll(), Copy(),
  ClearSelection(), IsInSelection(), GetSelectedText(), context menu lifecycle
- Update MarkdownView.Mouse.cs: add Command.SelectAll/Copy/Context, OnMouseEvent
  for drag selection, update OnActivated for drag-aware link handling,
  update OnHasFocusChanged for context menu lifecycle
- Update MarkdownView.Drawing.cs to highlight selected cells
- Update Markdown.cs: clear selection on text change, update docs
- Add MarkdownViewSelectionTests.cs with 12 tests

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* Fix code review issues: use explicit type int and App is not null pattern

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* Fix selection visibility and persistence after mouse release

- Fix selection attribute: use GetAttributeForRole(VisualRole.Focus) instead of
  reversing per-segment colors — gives reliable contrast across all schemes/themes
- Fix selection disappearing on mouse release: remove the LeftButtonReleased →
  Activate binding (inherited from base SetupMouse) so OnActivated fires only on
  LeftButtonClicked; previously OnActivated fired twice causing _isDragging to be
  reset before the Click, which then cleared the selection
- Add two regression tests: Selection_Persists_After_LeftButtonReleased and
  Plain_Click_Clears_Selection

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* Code cleanup

* Refactor MarkdownView mouse selection handling

Route mouse press and drag events through OnActivated by binding LeftButtonPressed and LeftButtonPressed|PositionReport to Command.Activate. Update selection logic accordingly and add unit tests to verify mouse bindings and drag-selection behavior.

* Add SelectedText property and markdown fidelity tests

Added public SelectedText property to Markdown view, returning the current selection as plain text or null if inactive. Documented that the output may differ from the markdown source. Introduced Copilot-marked tests verifying that selection and copy operations should preserve markdown structure (e.g., list markers, code fences). Tests currently fail, documenting known fidelity issues in the selection/copy implementation. No changes to selection/copy logic yet.

* Preserve markdown syntax in selection and copy

Improves MarkdownView selection/copy fidelity by reconstructing code block fences (with language tags) and list markers in selected/copied text. Returns original markdown source for full-document selections. Updates and adds tests to verify round-trip and partial selection correctness.

* Add test for table markdown preservation in selection

Adds PartialSelection_IncludingTable_SelectedText_Preserves_Table_Markdown to verify that partial selections including tables retain Markdown syntax. Documents current failure: table rows are missing from selected text due to placeholder rendering.

* Support GFM table markdown copy from selection

Reconstruct and output valid GitHub Flavored Markdown pipe-table syntax when selecting and copying table content. Store TableData in RenderedLine, and use it to generate markdown table lines with correct alignment and structure during selection.

* Potential fix for pull request finding

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* Potential fix for pull request finding

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* Fix right-click on unfocused Markdown view being a no-op

Handle RightButtonClicked in OnMouseEvent before command bindings fire:
- If view is not focused, SetFocus() first — this synchronously triggers
  OnHasFocusChanged(true) which creates the ContextMenu
- Then call ShowContextMenu(mouse.ScreenPosition) so the menu appears
  at the click location
- Remove RightButtonClicked → Command.Context mouse binding (now
  handled entirely in OnMouseEvent)
- Also fix keyboard context menu anchor: GetContextMenuScreenPosition()
  already provides ViewportToScreen fallback for the keyboard path;
  simplified the null-check in ShowContextMenu to use it
- Rename ambiguous local 'anchor' → 'viewportPosition' in
  GetContextMenuScreenPosition()
- Simplify LeftButtonReleased ungrab: remove redundant IsGrabbed check
  (UngrabMouse is a no-op when not grabbed)
- Add regression tests: RightClick_On_Unfocused_View_Creates_And_Shows_ContextMenu
  and RightClick_On_Focused_View_Shows_ContextMenu

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* Fix drag clamping, table duplication, SubView selection drawing, and IsFullDocumentSelected

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* Fix code review: use explicit int types in CountOccurrences helper

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* Fixes #3995. Add notify-clet.yml: dispatch to gui-cs/clet on develop publish + release tag (#5197)

* Initial plan

* Add notify-clet.yml: dispatch to gui-cs/clet on develop publish + release tag

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Co-authored-by: tig <585482+tig@users.noreply.github.com>

* Fixes #5192. Fix MarkdownView GetContentHeight overestimating height with tables (#5194)

* Initial plan

* Fix MarkdownView GetContentHeight overestimating height with tables

In BuildRenderedLines, tableView.Frame.Height was read after Recalculate()
set the Height Dim but before layout could update Frame. The Frame retained
a stale value from the initial Recalculate(80) in the TableData setter
(where width defaulted to 80 because Frame.Width was 0).

Fix: Add RenderedHeight property to MarkdownTable that is always up-to-date
after Recalculate(), and use it instead of Frame.Height in BuildRenderedLines.

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* Improve XML doc for RenderedHeight property

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* Fix table height overestimate in mixed-width documents

When a long unwrapped line (e.g. code) makes contentWidth > viewportWidth,
tables (Dim.Fill) render at the wider content width and may need fewer
wrapped rows. Add a pre-scan pass to compute _maxLineWidth from unwrapped
blocks first, then use max(viewportWidth, _maxLineWidth) as the table
layout width. This ensures table placeholder lines match the actual
rendered height at the final content width.

Add regression test proving the fix for this mixed-width scenario.

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* Address review: use OfType pattern matching instead of string comparison

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* Fixes #5193. Emit OSC 8 hyperlink sequences in Driver.ToAnsi() (#5195)

* Initial plan

* Emit OSC 8 hyperlink sequences in BuildAnsiForRegion for ToAnsi() output

When cells have associated URLs (set by Link/Markdown views via
Driver.CurrentUrl), ToAnsi() now emits OSC 8 open/close sequences
around the link text. This makes links clickable in terminals that
support OSC 8 (Windows Terminal, iTerm2, GNOME Terminal, etc.).

The live rendering path (OutputBase.Write) already handled this;
only the ToAnsi() export path was missing URL tracking.

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* Potential fix for pull request finding

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* Add fast-path in GetCellUrl to skip lock when no URLs exist, add row-boundary test

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* Fix thread-safety: re-check _urlMap inside lock after fast-path null check

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* notify-clet: deterministic version handoff + flat-container poll (#5198)

The previous notify-clet.yml used `dotnet package search` to discover
the version that publish.yml just pushed. That hit NuGet's search/
registration index, which is eventually consistent. On 2026-05-05 a
develop publish triggered notify-clet two seconds after Terminal.Gui
2.0.2-develop.37 hit NuGet, but `dotnet package search` still returned
.36 — so the gui-cs/clet workflow built and published .36 a second time
(silently no-op'd by --skip-duplicate). Result: testers stuck on .36;
the markdown rendering fix shipped in .37 never reached them.

Two changes fix the race:

publish.yml writes the just-pushed version (the GitVersion SemVer it
already computes) to a `published-version` artifact. Deterministic; no
round-trip through any NuGet API.

notify-clet.yml downloads that artifact via workflow_run + actions/
download-artifact, then polls NuGet's *flat-container* API (the
endpoint `dotnet restore` actually uses, which indexes within
seconds — not the search/registration index that lags by minutes)
until the version is restorable. Cap is 10 minutes; in practice
flat-container is sub-minute. If the cap trips, the workflow fails
loudly rather than silently dispatching a stale or unbuildable version.

Channel detection (release vs develop) now derives from the SemVer
suffix on the artifact contents, so the dual on: triggers (release +
workflow_run) collapse to a single workflow_run trigger — publish.yml
already runs on both develop pushes and v* tags, so workflow_run
covers both channels. `actions: read` permission added so notify-clet
can read artifacts from the triggering run.

Repro of the bug: gui-cs/clet workflow run 25406348354 dispatched
TG_VERSION=2.0.2-develop.36 even though the triggering TG publish
(run 25406288505 on this repo) had pushed .37. The clet build that
fixed the symptom required a manual `gh workflow run` dispatch.

* Update package versions and remove nullable from tests

- Bump, add, and reorder NuGet package versions in Directory.Packages.props, including new test and utility dependencies
- Remove Solution Items reference to docfx\docs\borders.md from Terminal.sln
- Refactor ConfigurationMangerTests.cs to use non-nullable types for improved null-safety

* Fixes #3961. Replace ColorPicker TextField+autocomplete with DropDownList (#5199)

* Initial plan

* Replace ColorPicker TextField+autocomplete with DropDownList for color names

Fixes the ColorPicker to use a DropDownList control instead of a TextField
with AppendAutocomplete for selecting color names. This provides a better
user experience with a proper dropdown list of available color names.

Changes:
- Replace _tfName (TextField) with _ddlName (DropDownList)
- Use ListWrapper<string> with color names as the DropDownList source
- Set DropDownList to ReadOnly mode for selection-only behavior
- Add _syncingSubViews guard to prevent re-entrancy when syncing values
- Update tests to reflect the new DropDownList behavior

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* Fix var usage: use explicit string type per codebase conventions

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* Fix App_EnableForDesign_DrawsCorrectly test for DropDownList toggle button

The DropDownList renders a ▼ toggle button that the old TextField didn't
have. Update the expected output in TabsTests to include the arrow character
in the ColorPicker Name field rendering.

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* Fixes #5203 - Add TrySetValueFromString to IValue for IParsable-based string assignment (#5205)

* Initial plan

* Add TrySetValueFromString to IValue with default IParsable-based impl

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* polish: improve test class comment wording per code review

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* Update examples to demonstrate IValue.TrySetValueFromString

- InlineColorPicker: Add --initial <color> CLI arg with error on invalid
- InlineSelect: Add --initial <label|index> with label matching and error
- UICatalog Popovers: Add Initial Value TextField, apply via TrySetValueFromString
- PromptExample: Add Initial Value TextField, apply to all prompt views
- OptionSelector: Sync FocusedItem when Value changes via OnValueChanged

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* Refactor argument parsing to use switch statement

Refactored command-line argument parsing from if/else to a switch statement with pattern matching for better clarity and maintainability. Improved error handling for missing argument values and changed orientation variable to explicit Orientation type.

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* Fixes #4859. Render to /dev/tty when stdout is redirected (#5208)

* Initial plan

* Render to /dev/tty (Unix) / CONOUT$ (Windows) when stdio is redirected

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* Address review feedback: clarify ttyFd ownership; drop unused Windows P/Invokes

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* Address review comments with clarifying documentation

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* Fixes #5209. TableView header separator lines draw with focus attribute (#5210)

* Initial plan

* Fix TableView header separator lines drawing with focus attribute

The RenderHeaderMidline method was setting the focus/header color
attribute before drawing separator lines (│), causing the vertical
lines between column headers to be rendered with the focus scheme
instead of the normal scheme. This fix resets to Normal attribute
before drawing separators and only applies the focus attribute to
the header text content itself.

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* Fixes #5211. FlagSelector ENTER should not toggle, just accept. (#5212)

* Initial plan

* Fix FlagSelector ENTER to only accept without toggling

Add virtual ActivateOnAccept property to SelectorBase (defaults true
for OptionSelector). FlagSelector overrides it to return false so
Enter just accepts without toggling the focused item.

Fixes #4473

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* Fixes #5202 - BREAKING CHANGE- Refactor LinearRange to implement IValue<T> (#5204)

* Add design plan for LinearRange IValue<T> refactor and clet

* Refactor LinearRange to implement IValue<T> with three subclasses

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* Remove redundant with {} expression in LinearRange.SpanFromIndices

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* Address PR review: split tests, add visual tests, fix mouse drag, remove legend styling

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* Fix CI: update HardCoded cache test to new LinearRangeDefaults config key

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* Add IDesignable.EnableForDesign() to each LinearRange subclass with meaningful demo data

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* Fix mouse drag for LinearRange: anchor-based drag for Closed; set semantics for Left/Right Bounded

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* Add non-generic LinearSelector / LinearMultiSelector / LinearRange so AllViewsTester can discover them

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* Default DragChar to ContinuousMeterSegment so it matches SetChar

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* Remove redundant ClearViewport in LinearRange draw to fix drag flicker

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* Potential fix for pull request finding

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* Potential fix for pull request finding

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* Add SelectedIndex to LinearSelector for unambiguous "no selection" with value-type T

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* Use HashSet to dedupe indices in LinearMultiSelector.Value setter (O(n) instead of O(n^2))

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* Fixes #5213. Security: fix PowerShell command injection in WSLClipboard.SetClipboardDataImpl (#5218)

* Initial plan

* Fix PowerShell command injection in WSLClipboard.SetClipboardDataImpl

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* Fixes #5216. FileDialog: reject path-traversal in Rename/New and skip symlinks in search (#5222)

* Initial plan

* Fix FileDialog path-traversal in Rename/New and symlink-loop in search

- Add IsContainedIn() and ContainsInvalidNameCharacters() validation to
  DefaultFileOperations.Rename and DefaultFileOperations.New to reject
  names that would traverse outside the parent directory.
- Add reparse-point check in FileDialog.SearchState.RecursiveFind to
  prevent infinite recursion through symlink loops.
- Make FileSystemTreeBuilder.IsReparsePoint internal for reuse.
- Add fdPathTraversalError string resource.
- Add unit tests for path validation helpers.

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* Refactor: validate name characters before Path.Combine for early detection

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* Fixes #5215. Sanitize control characters to prevent terminal escape injection (#5223)

* Initial plan

* Security: Sanitize control characters in MakePrintable to prevent terminal escape injection

Fix CVE: Untrusted text containing ESC bytes (and other C0/C1 control characters)
was being emitted verbatim to the terminal, enabling terminal hijacking via
MarkdownView, Label, TextView, FileDialog, etc.

The fix strengthens MakePrintable (both string and Rune overloads) to:
- Handle multi-character graphemes containing control characters (previously
  only single-char strings were sanitized)
- Map C0 controls (U+0000-U+001F except TAB) and DEL (U+007F) to Unicode
  Control Pictures (U+2400-U+247F)
- Map C1 controls (U+0080-U+009F) to space (no standard pictures exist)
- Preserve TAB (U+0009) which is handled by higher layers

Also fixes FillRect path in OutputBufferImpl which bypassed MakePrintable
entirely.

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* Address code review: fix ternary formatting and test comment style

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* Fix TAB passthrough, restore C1 control pictures, remove per-char scan

- TAB no longer passes through raw (maps to U+2409 like all C0 controls)
- C1 controls (U+0080-U+009F) map via +U+2400 offset (distinct visuals)
- Remove per-char loop scan for multi-char graphemes: per UAX #29, controls
  are always grapheme cluster boundaries, so only first char needs checking
- Rune.MakePrintable reverted to original one-liner (all controls: +0x2400)

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* Fixes #5214. Security: restrict Link.OpenUrl to safe URI schemes; replace cmd /c start with ShellExecute on Windows (#5220)

* Initial plan

* Fix: Link.OpenUrl - scheme allowlist + Windows ShellExecute instead of cmd /c start

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* Fix: wrap Process.Start calls in try/catch in OpenUrl; log failures via Logging.Warning

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* docs: expand SafeSchemes XML docs with file:// migration path guidance

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* Fixes #5215. Bound ANSI parser held content to prevent memory DoS (#5221)

* Initial plan

* Security: Bound held content in ANSI parser to prevent memory DoS

Add MaxHeldLength (8 KiB) cap to AnsiResponseParserBase that releases
held content when exceeded, preventing unbounded memory growth from
malformed/unterminated escape sequences.

Add MaxMouseSequenceLength (64) guard to AnsiMouseParser to prevent
regex evaluation against pathologically large inputs.

Add MaxKeyboardSequenceLength (64) guard to AnsiKeyboardParser to
prevent pattern evaluation against oversized inputs.

Fixes gui-cs/Terminal.Gui#5268

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* Address review: add model name to test file comment

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* Fixes #5227. Make links inside markdown table cells fully interactive (#5228)

* Initial plan

* Fix links inside markdown table cells not being clickable

Add OnActivated handler and HitTestLink method to MarkdownTable that
detects clicks on link segments within table cells. Wire up table
LinkClicked events to parent Markdown.RaiseLinkClicked during layout.

Add Link Shortcut to MarkdownTester and Deepdives scenario status bars
that displays the URL when a link is clicked.

Fixes #4194

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* Apply guard clause pattern in table link event handler

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* Remove Link shortcut from status bars; update EnableForDesign with link in table and opt-in pattern

- Revert MarkdownTester and Deepdives scenario status bar changes
- Update MarkdownTable.EnableForDesign: "Markdown" feature is now a link
  to the API docs URL
- Update Markdown.EnableForDesign: opt-in to links (e.Handled = true)
- Update DefaultMarkdownSample table to include a Markdown link
- Add LinkClicked opt-in handler in MarkdownTester scenario

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* Add OSC8 rendering, Tab navigation, and focus support for links in MarkdownTable

- Set Driver.CurrentUrl when drawing link segments for OSC8 hyperlink support
- Add link region tracking and Tab/Shift-Tab cycling through table links
- Make table focusable when it contains links (CanFocus/TabStop)
- Highlight active link with reversed colors when focused
- Add OnAdvancingFocus, OnHasFocusChanged, and Command.Accept handler
- Refactor link activation into RaiseLinkClicked helper

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* Enhance Markdown sample and UI Catalog docs

Updated README to link UI Catalog to Terminal.Gui repo. Improved MarkdownTester preview layout and link handling. Expanded DefaultMarkdownSample with a TOC and richer markdown feature examples for better demonstration and testing.

* Expand [!INCLUDE] in Deepdives Markdown viewer

Added support for expanding Markdown [!INCLUDE] directives in the Deepdives scenario by fetching, caching, and substituting include files from the GitHub API. Introduced async loading of includes and updated document rendering to process includes before display.

* Fix link region dedup: track by position (row/col), not just URL

- TableLinkRegion now stores RowIndex and ColIndex for unique identification
- BuildLinkRegions deduplicates within a cell only (same URL in different cells
  creates separate navigable entries)
- IsActiveLinkAt checks position + URL so only the focused link highlights
- HitTestLinkIndex maps click position to exact link region index
- Active highlight no longer gated on absolute-URI (relative URLs and anchors
  now render reversed when focused)
- Deepdives scenario sets e.Handled=true to prevent Link.OpenUrl from firing

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* Add unit tests for Tab/Shift-Tab link navigation and Enter activation in MarkdownTable

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* Fix style: use explicit List<string> type instead of var

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* Fix anchor links in table cells not scrolling to headings

Table links with #anchor URLs now call ScrollToAnchor on the parent
MarkdownView, matching the behavior of paragraph anchor links.
Also prevent Link.OpenUrl from being called for anchor URLs (meaningless).

Added tests proving:
- Issue 1 (anchor links don't navigate): confirmed and fixed
- Issue 2 (duplicate URL dedup): confirmed false - the dedup is
  correctly scoped per-cell only; same URL in different cells creates
  separate navigable entries

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* Revise security policy for supported versions (#5235)

Updated the supported versions and reporting instructions.

* Fixes #5206. Add IValue<int> support to ScrollSlider (#5229)

* Initial plan

* Add IValue<int> support to ScrollSlider

ScrollSlider now implements IValue<int> with Value as an alias for Position.
Raises ValueChanging, ValueChanged, and ValueChangedUntyped events.
Position property remains for backwards compatibility.
ScrollBar already implements IValue<int> - no changes needed.

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* Improve XML docs on ScrollSlider.Value property

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* Fixes #5153. Make Markdown work like Label (#5231)

* Fixes #5153. Make Markdown forward HotKey to next peer like Label

When CanFocus is false and a valid HotKey is set, Markdown now forwards
Command.HotKey to the next peer in SuperView.SubViews — mirroring the
existing Label behavior. This lets a non-focusable Markdown view describe
a focusable peer (e.g. a TextField) and move focus there when its hotkey
is pressed, addressing the inline-clickable-link use case from #5153
without adding new markup.

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* Fix Markdown text-derived hotkeys

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* Document Markdown.HotKeySpecifier divergence from Label

Add <remarks> noting that Markdown derives HotKey from Text (raw
markdown) rather than Title — because Markdown.Text doesn't flow
through Title the way Label.Text does.

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* Fixes #5140. TableView: support CollectionNavigator = null to disable type-to-search (#5232)

The CollectionNavigator property doc says "Set to null to disable this feature,"
but the property type was non-nullable and CycleToNextTableEntryBeginningWith
dereferenced it without a guard, so setting it to null would NRE.

Make the property nullable and add an early-return guard in
CycleToNextTableEntryBeginningWith. With CollectionNavigator = null, printable
keys not otherwise bound now bubble through normal key handling instead of
being consumed for incremental row navigation — letting apps use single-letter
shortcuts while focus remains in the table.

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* Fixes #5126. TableView: don't raise Activating when click is outside any cell (#5233)

* Fixes #5126. TableView: don't raise Activating when click is outside any cell

Override OnActivating to cancel activation when a left-click lands in the
header area or below the last data row. Previously, ScreenToCell-returned-
null was only handled inside OnActivated, by which time the Activating event
had already fired with no real selection.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* Address review: reject clicks in horizontal whitespace; expand tests

ScreenToCell maps far-right X positions onto the last rendered column (its
column lookup picks the largest X with X <= clientX, with no upper-bound
check). When ExpandLastColumn is false there is visible whitespace to the
right of the last column; without an X-bound check those clicks would still
raise Activating.

Add IsXWithinAnyRenderedColumn and apply it inside TryGetMouseCellHit so the
check runs only on the activation path; ScreenToCell's public API behavior
is unchanged.

Add tests:
- Click_RightOfLastColumn_DoesNotRaise_Activating (ExpandLastColumn=false)
- Click_OnHeader_DoesNotRaise_Activating
- Click_EmptyTable_DoesNotRaise_Activating
- Click_TableWithZeroRows_DoesNotRaise_Activating

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---------

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* Fixes #5076. Allow hiding TableView outer vertical lines (#5234)

* Fixes #5076. Allow hiding TableView outer vertical lines

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* Update TableView test scenario for outer vertical lines

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* Fixes #5230 - Markdown checklist glyph rendering (#5236)

* Initial plan

* Use glyphs for markdown checklist items

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* Document markdown list marker translation

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* Clarify markdown checkbox marker alignment

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* Tidy markdown marker review feedback

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* Refine markdown checkbox marker readability

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Co-authored-by: tig <585482+tig@users.noreply.github.com>

* Simplify markdown marker translation helper

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Co-authored-by: tig <585482+tig@users.noreply.github.com>

* Use ordinal markdown marker comparisons

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Co-authored-by: tig <585482+tig@users.noreply.github.com>

* Complete markdown marker helper docs

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