Improve table rendering: inline markdown, wrap, alignment, autolink

[jinzex]

Summary

Improve markdown table rendering in the terminal view so table cells render inline markdown, respect column alignment, wrap cleanly when the table is wider than the terminal, autolink bare URLs, and let keyboard navigation reach every link in a row. Also fixes a false-positive unsaved-changes dialog.

What's in

• Inline markdown in table cells. [link](url), **bold**, *italic*, `code`, ~~strike~~, [[wiki]] now render like they do in any other paragraph (previously cells showed raw source).
• Column alignment. :--- / ---: / :---: in the separator row drive Left/Right/Center padding.
• Wide tables wrap cleanly. Columns cap against the terminal width (shrink-widest-first with a floor); cells wrap at whitespace; row height grows to the tallest cell.
• Bare URL autolink. https://example.com pasted directly renders as a styled link and opens with Enter, inside and outside tables.
• Navigable links. Arrow-key cycling reaches every [text](url) and bare URL in a row (previously only the first one per row was navigable). "Open ↗" hint on the cursored row.
• Fix: edit-mode → Esc with no edits no longer opens the unsaved-changes dialog when the file ends with a trailing newline.

Example to reproduce

Save as any .md file and open it with ekphos:

## 1. Inline markdown inside cells

| Feature         | Status   | Notes                                                      |
| --------------- | -------- | ---------------------------------------------------------- |
| **warp decode** | `proto`  | see [docs](https://example.com), [more](https://example.com/b) |
| *MxFp8×BF16*    | `ok`     | two kernels: `gate+up`, then `down`                        |
| TRT-LLM Gen     | `stable` | tensor cores, **128 experts**                              |

## 2. Column alignment

| Name    | Value | Score |
| :------ | :---: | ----: |
| alpha   |   1   |   100 |
| beta    |  20   |  2000 |
| gamma   | 300   | 30000 |

## 3. Wide cells wrap

| Step | Action                                                                                                                      |
| ---- | --------------------------------------------------------------------------------------------------------------------------- |
| 1    | Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. |
| 2    | Pack my box with five dozen liquor jugs, then label each one carefully with the date and destination.                       |

## 4. Bare URL autolinking

| Site  | URL                                |
| ----- | ---------------------------------- |
| Plain | https://example.com                |
| Path  | https://example.com/docs?section=1 |

## 5. Newline support <br>

| Name  | Step                               |
| ----- | ---------------------------------- |
| A     | step 1 <br>step 2                  |
| B     | step b.1 <br>step b.2 <br> step b.3|

Before / after

Before	After

Test plan

• cargo test --release — 396 pass, 0 fail.
• cargo build --release and open the example above — all four tables render correctly.
• Arrow keys cycle through every link in a row; Enter opens.
• Resize terminal — wide tables reflow.
• Press e and then Esc on an unchanged note — no unsaved-changes dialog.